Fixed implicit tagging completely and switched DB to PostgreSQL

14 files changed, 172 insertions, 488 deletions

diff --git a/Controllers/MediaController.cs b/Controllers/MediaController.cs
index 3f36064..3fd716e 100644
--- a/Controllers/MediaController.cs
+++ b/Controllers/MediaController.cs
@@ -119,7 +119,7 @@ public class MediaController : Controller {
         var fileRecord = new UploadedFile() {
             Filename         = formFile.FileName,
             OriginalChecksum = hash,
-            UploadTime       = DateTime.Now,
+            UploadTime       = DateTime.UtcNow,
             LastAccessTime   = lastAccessTime,
             LastWriteTime    = lastWriteTime,
             CreateTime       = createTime
diff --git a/HBContext.cs b/HBContext.cs
index 162a2c7..04f2d1a 100644
--- a/HBContext.cs
+++ b/HBContext.cs
@@ -1,6 +1,5 @@
 using Microsoft.EntityFrameworkCore;
 using HyperBooru.Services;
-using Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage;
 
 namespace HyperBooru;
 
@@ -18,9 +17,7 @@ public class HBContext : DbContext {
 
     protected override void OnConfiguring(DbContextOptionsBuilder options) {
         options.UseLazyLoadingProxies();
-
-        var path = Path.Join(config.DataPath, "HyperBooru.db");
-        options.UseSqlite($"Data Source = {config.DbPath}");
+        options.UseNpgsql(config.DbConnectionString);
 
         #if DEBUG
         options.EnableSensitiveDataLogging();
@@ -28,17 +25,22 @@ public class HBContext : DbContext {
     }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder) {
+        // Don't use shared tables for inherited types
         modelBuilder.Entity<HBObject>().ToTable("Objects");
         modelBuilder.Entity<TagDefinition>().ToTable("TagDefinitions");
         modelBuilder.Entity<Tag>().ToTable("Tags");
         modelBuilder.Entity<Media>().ToTable("Media");
         modelBuilder.Entity<UploadedFile>().ToTable("UploadedFiles");
 
+        // Seed internal tag definitions
+        // These should NEVER change
         modelBuilder.Entity<TagDefinition>().HasData(new TagDefinition[] {
             new() { ObjectId = -1, Source = TagSource.Internal, Name = "nsfw"   },
             new() { ObjectId = -2, Source = TagSource.Internal, Name = "ingest" }
         });
 
+        // Implicit tags need some special attention to make many<->many
+        // navigations work for the same object type.
         modelBuilder.Entity<TagDefinition>()
             .HasMany(e => e.ImplicitTags)
             .WithMany();
diff --git a/Media.cs b/Media.cs
index 68ae4c4..2ff10bf 100644
--- a/Media.cs
+++ b/Media.cs
@@ -35,7 +35,7 @@ public record UploadedFile {
     public         int       UploadedFileId   { get; set; }
     public         string    OriginalChecksum { get; set; }
     public         string?   Filename         { get; set; }
-    public         DateTime  UploadTime       { get; set; } = DateTime.Now;
+    public         DateTime  UploadTime       { get; set; } = DateTime.UtcNow;
     public         DateTime? LastAccessTime   { get; set; }
     public         DateTime? LastWriteTime    { get; set; }
     public         DateTime? CreateTime       { get; set; }
diff --git a/Migrations/20230814013743_Initial.Designer.cs b/Migrations/20230814013743_Initial.Designer.cs
deleted file mode 100644
index c221c85..0000000
--- a/Migrations/20230814013743_Initial.Designer.cs
+++ /dev/null
@@ -1,234 +0,0 @@
-// <auto-generated />
-using System;
-using HyperBooru;
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Infrastructure;
-using Microsoft.EntityFrameworkCore.Migrations;
-using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
-
-#nullable disable
-
-namespace HyperBooru.Migrations
-{
-    [DbContext(typeof(HBContext))]
-    [Migration("20230814013743_Initial")]
-    partial class Initial
-    {
-        /// <inheritdoc />
-        protected override void BuildTargetModel(ModelBuilder modelBuilder)
-        {
-#pragma warning disable 612, 618
-            modelBuilder
-                .HasAnnotation("ProductVersion", "7.0.10")
-                .HasAnnotation("Proxies:ChangeTracking", false)
-                .HasAnnotation("Proxies:CheckEquality", false)
-                .HasAnnotation("Proxies:LazyLoading", true);
-
-            modelBuilder.Entity("HyperBooru.HBObject", b =>
-                {
-                    b.Property<int>("ObjectId")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("INTEGER");
-
-                    b.Property<Guid>("Guid")
-                        .HasColumnType("TEXT");
-
-                    b.HasKey("ObjectId");
-
-                    b.HasIndex("Guid");
-
-                    b.ToTable("Objects", (string)null);
-
-                    b.UseTptMappingStrategy();
-                });
-
-            modelBuilder.Entity("HyperBooru.UploadedFile", b =>
-                {
-                    b.Property<int>("UploadedFileId")
-                        .ValueGeneratedOnAdd()
-                        .HasColumnType("INTEGER");
-
-                    b.Property<DateTime?>("CreateTime")
-                        .HasColumnType("TEXT");
-
-                    b.Property<string>("Filename")
-                        .HasColumnType("TEXT");
-
-                    b.Property<DateTime?>("LastAccessTime")
-                        .HasColumnType("TEXT");
-
-                    b.Property<DateTime?>("LastWriteTime")
-                        .HasColumnType("TEXT");
-
-                    b.Property<int>("MediaObjectId")
-                        .HasColumnType("INTEGER");
-
-                    b.Property<string>("OriginalChecksum")
-                        .IsRequired()
-                        .HasColumnType("TEXT");
-
-                    b.Property<DateTime>("UploadTime")
-                        .HasColumnType("TEXT");
-
-                    b.HasKey("UploadedFileId");
-
-                    b.HasIndex("MediaObjectId");
-
-                    b.ToTable("UploadedFiles", (string)null);
-                });
-
-            modelBuilder.Entity("HyperBooru.Media", b =>
-                {
-                    b.HasBaseType("HyperBooru.HBObject");
-
-                    b.Property<string>("Checksum")
-                        .IsRequired()
-                        .HasColumnType("TEXT");
-
-                    b.Property<string>("LongDescription")
-                        .HasColumnType("TEXT");
-
-                    b.Property<string>("MimeType")
-                        .IsRequired()
-                        .HasColumnType("TEXT");
-
-                    b.Property<string>("ShortDescription")
-                        .HasColumnType("TEXT");
-
-                    b.ToTable("Media", (string)null);
-                });
-
-            modelBuilder.Entity("HyperBooru.Tag", b =>
-                {
-                    b.HasBaseType("HyperBooru.HBObject");
-
-                    b.Property<DateTime>("CreateTime")
-                        .HasColumnType("TEXT");
-
-                    b.Property<int>("TagDefinitionObjectId")
-                        .HasColumnType("INTEGER");
-
-                    b.Property<int>("TargetObjectId")
-                        .HasColumnType("INTEGER");
-
-                    b.HasIndex("TagDefinitionObjectId");
-
-                    b.HasIndex("TargetObjectId");
-
-                    b.ToTable("Tags", (string)null);
-                });
-
-            modelBuilder.Entity("HyperBooru.TagDefinition", b =>
-                {
-                    b.HasBaseType("HyperBooru.HBObject");
-
-                    b.Property<string>("Name")
-                        .IsRequired()
-                        .HasColumnType("TEXT");
-
-                    b.Property<string>("Namespace")
-                        .HasColumnType("TEXT");
-
-                    b.Property<int>("Source")
-                        .HasColumnType("INTEGER");
-
-                    b.Property<int?>("TagDefinitionObjectId")
-                        .HasColumnType("INTEGER");
-
-                    b.HasIndex("TagDefinitionObjectId");
-
-                    b.ToTable("TagDefinitions", (string)null);
-
-                    b.HasData(
-                        new
-                        {
-                            ObjectId = -1,
-                            Guid = new Guid("cbd871cb-8790-4519-9f74-90d1e13a48a0"),
-                            Name = "nsfw",
-                            Source = 0
-                        },
-                        new
-                        {
-                            ObjectId = -2,
-                            Guid = new Guid("716ac11f-135a-433c-84a7-7bdfddbec004"),
-                            Name = "ingest",
-                            Source = 0
-                        });
-                });
-
-            modelBuilder.Entity("HyperBooru.UploadedFile", b =>
-                {
-                    b.HasOne("HyperBooru.Media", "Media")
-                        .WithMany("UploadedFiles")
-                        .HasForeignKey("MediaObjectId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
-
-                    b.Navigation("Media");
-                });
-
-            modelBuilder.Entity("HyperBooru.Media", b =>
-                {
-                    b.HasOne("HyperBooru.HBObject", null)
-                        .WithOne()
-                        .HasForeignKey("HyperBooru.Media", "ObjectId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
-                });
-
-            modelBuilder.Entity("HyperBooru.Tag", b =>
-                {
-                    b.HasOne("HyperBooru.HBObject", null)
-                        .WithOne()
-                        .HasForeignKey("HyperBooru.Tag", "ObjectId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
-
-                    b.HasOne("HyperBooru.TagDefinition", "TagDefinition")
-                        .WithMany()
-                        .HasForeignKey("TagDefinitionObjectId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
-
-                    b.HasOne("HyperBooru.HBObject", "Target")
-                        .WithMany("Tags")
-                        .HasForeignKey("TargetObjectId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
-
-                    b.Navigation("TagDefinition");
-
-                    b.Navigation("Target");
-                });
-
-            modelBuilder.Entity("HyperBooru.TagDefinition", b =>
-                {
-                    b.HasOne("HyperBooru.HBObject", null)
-                        .WithOne()
-                        .HasForeignKey("HyperBooru.TagDefinition", "ObjectId")
-                        .OnDelete(DeleteBehavior.Cascade)
-                        .IsRequired();
-
-                    b.HasOne("HyperBooru.TagDefinition", null)
-                        .WithMany("ImplicitTags")
-                        .HasForeignKey("TagDefinitionObjectId");
-                });
-
-            modelBuilder.Entity("HyperBooru.HBObject", b =>
-                {
-                    b.Navigation("Tags");
-                });
-
-            modelBuilder.Entity("HyperBooru.Media", b =>
-                {
-                    b.Navigation("UploadedFiles");
-                });
-
-            modelBuilder.Entity("HyperBooru.TagDefinition", b =>
-                {
-                    b.Navigation("ImplicitTags");
-                });
-#pragma warning restore 612, 618
-        }
-    }
-}
diff --git a/Migrations/20230816233054_ImplicitTags.cs b/Migrations/20230816233054_ImplicitTags.cs
deleted file mode 100644
index 26078d6..0000000
--- a/Migrations/20230816233054_ImplicitTags.cs
+++ /dev/null
@@ -1,123 +0,0 @@
-using System;
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-
-namespace HyperBooru.Migrations
-{
-    /// <inheritdoc />
-    public partial class ImplicitTags : Migration
-    {
-        /// <inheritdoc />
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropForeignKey(
-                name: "FK_TagDefinitions_TagDefinitions_TagDefinitionObjectId",
-                table: "TagDefinitions");
-
-            migrationBuilder.DropIndex(
-                name: "IX_TagDefinitions_TagDefinitionObjectId",
-                table: "TagDefinitions");
-
-            migrationBuilder.DropColumn(
-                name: "TagDefinitionObjectId",
-                table: "TagDefinitions");
-
-            migrationBuilder.CreateTable(
-                name: "TagDefinitionTagDefinition",
-                columns: table => new
-                {
-                    ImplicitTagsObjectId = table.Column<int>(type: "INTEGER", nullable: false),
-                    TagDefinitionObjectId = table.Column<int>(type: "INTEGER", nullable: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_TagDefinitionTagDefinition", x => new { x.ImplicitTagsObjectId, x.TagDefinitionObjectId });
-                    table.ForeignKey(
-                        name: "FK_TagDefinitionTagDefinition_TagDefinitions_ImplicitTagsObjectId",
-                        column: x => x.ImplicitTagsObjectId,
-                        principalTable: "TagDefinitions",
-                        principalColumn: "ObjectId",
-                        onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_TagDefinitionTagDefinition_TagDefinitions_TagDefinitionObjectId",
-                        column: x => x.TagDefinitionObjectId,
-                        principalTable: "TagDefinitions",
-                        principalColumn: "ObjectId",
-                        onDelete: ReferentialAction.Cascade);
-                });
-
-            migrationBuilder.UpdateData(
-                table: "Objects",
-                keyColumn: "ObjectId",
-                keyValue: -2,
-                column: "Guid",
-                value: new Guid("8b9cd13c-422a-4958-b97e-b858ac9301db"));
-
-            migrationBuilder.UpdateData(
-                table: "Objects",
-                keyColumn: "ObjectId",
-                keyValue: -1,
-                column: "Guid",
-                value: new Guid("13399c38-34b8-44a1-ac42-536bd32de96a"));
-
-            migrationBuilder.CreateIndex(
-                name: "IX_TagDefinitionTagDefinition_TagDefinitionObjectId",
-                table: "TagDefinitionTagDefinition",
-                column: "TagDefinitionObjectId");
-        }
-
-        /// <inheritdoc />
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropTable(
-                name: "TagDefinitionTagDefinition");
-
-            migrationBuilder.AddColumn<int>(
-                name: "TagDefinitionObjectId",
-                table: "TagDefinitions",
-                type: "INTEGER",
-                nullable: true);
-
-            migrationBuilder.UpdateData(
-                table: "Objects",
-                keyColumn: "ObjectId",
-                keyValue: -2,
-                column: "Guid",
-                value: new Guid("716ac11f-135a-433c-84a7-7bdfddbec004"));
-
-            migrationBuilder.UpdateData(
-                table: "Objects",
-                keyColumn: "ObjectId",
-                keyValue: -1,
-                column: "Guid",
-                value: new Guid("cbd871cb-8790-4519-9f74-90d1e13a48a0"));
-
-            migrationBuilder.UpdateData(
-                table: "TagDefinitions",
-                keyColumn: "ObjectId",
-                keyValue: -2,
-                column: "TagDefinitionObjectId",
-                value: null);
-
-            migrationBuilder.UpdateData(
-                table: "TagDefinitions",
-                keyColumn: "ObjectId",
-                keyValue: -1,
-                column: "TagDefinitionObjectId",
-                value: null);
-
-            migrationBuilder.CreateIndex(
-                name: "IX_TagDefinitions_TagDefinitionObjectId",
-                table: "TagDefinitions",
-                column: "TagDefinitionObjectId");
-
-            migrationBuilder.AddForeignKey(
-                name: "FK_TagDefinitions_TagDefinitions_TagDefinitionObjectId",
-                table: "TagDefinitions",
-                column: "TagDefinitionObjectId",
-                principalTable: "TagDefinitions",
-                principalColumn: "ObjectId");
-        }
-    }
-}
diff --git a/Migrations/20230816233054_ImplicitTags.Designer.cs b/Migrations/20230817010522_Initial.Designer.cs
index 531b14c..1219beb 100644
--- a/Migrations/20230816233054_ImplicitTags.Designer.cs
+++ b/Migrations/20230817010522_Initial.Designer.cs
@@ -5,14 +5,15 @@ using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Migrations;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
 namespace HyperBooru.Migrations
 {
     [DbContext(typeof(HBContext))]
-    [Migration("20230816233054_ImplicitTags")]
-    partial class ImplicitTags
+    [Migration("20230817010522_Initial")]
+    partial class Initial
     {
         /// <inheritdoc />
         protected override void BuildTargetModel(ModelBuilder modelBuilder)
@@ -22,16 +23,21 @@ namespace HyperBooru.Migrations
                 .HasAnnotation("ProductVersion", "7.0.10")
                 .HasAnnotation("Proxies:ChangeTracking", false)
                 .HasAnnotation("Proxies:CheckEquality", false)
-                .HasAnnotation("Proxies:LazyLoading", true);
+                .HasAnnotation("Proxies:LazyLoading", true)
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
 
             modelBuilder.Entity("HyperBooru.HBObject", b =>
                 {
                     b.Property<int>("ObjectId")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("ObjectId"));
 
                     b.Property<Guid>("Guid")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("uuid");
 
                     b.HasKey("ObjectId");
 
@@ -46,29 +52,31 @@ namespace HyperBooru.Migrations
                 {
                     b.Property<int>("UploadedFileId")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("UploadedFileId"));
 
                     b.Property<DateTime?>("CreateTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.Property<string>("Filename")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<DateTime?>("LastAccessTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.Property<DateTime?>("LastWriteTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.Property<int>("MediaObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.Property<string>("OriginalChecksum")
                         .IsRequired()
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<DateTime>("UploadTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.HasKey("UploadedFileId");
 
@@ -80,10 +88,10 @@ namespace HyperBooru.Migrations
             modelBuilder.Entity("TagDefinitionTagDefinition", b =>
                 {
                     b.Property<int>("ImplicitTagsObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.Property<int>("TagDefinitionObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.HasKey("ImplicitTagsObjectId", "TagDefinitionObjectId");
 
@@ -98,17 +106,17 @@ namespace HyperBooru.Migrations
 
                     b.Property<string>("Checksum")
                         .IsRequired()
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<string>("LongDescription")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<string>("MimeType")
                         .IsRequired()
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<string>("ShortDescription")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.ToTable("Media", (string)null);
                 });
@@ -118,13 +126,13 @@ namespace HyperBooru.Migrations
                     b.HasBaseType("HyperBooru.HBObject");
 
                     b.Property<DateTime>("CreateTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.Property<int>("TagDefinitionObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.Property<int>("TargetObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.HasIndex("TagDefinitionObjectId");
 
@@ -139,13 +147,13 @@ namespace HyperBooru.Migrations
 
                     b.Property<string>("Name")
                         .IsRequired()
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<string>("Namespace")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<int>("Source")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.ToTable("TagDefinitions", (string)null);
 
@@ -153,14 +161,14 @@ namespace HyperBooru.Migrations
                         new
                         {
                             ObjectId = -1,
-                            Guid = new Guid("13399c38-34b8-44a1-ac42-536bd32de96a"),
+                            Guid = new Guid("e906ff13-ee7d-4eb2-826b-1cf880590f6b"),
                             Name = "nsfw",
                             Source = 0
                         },
                         new
                         {
                             ObjectId = -2,
-                            Guid = new Guid("8b9cd13c-422a-4958-b97e-b858ac9301db"),
+                            Guid = new Guid("bab0a0f2-b126-429c-a80e-4f339a1f4bb2"),
                             Name = "ingest",
                             Source = 0
                         });
diff --git a/Migrations/20230814013743_Initial.cs b/Migrations/20230817010522_Initial.cs
index 1390c18..c8c8221 100644
--- a/Migrations/20230814013743_Initial.cs
+++ b/Migrations/20230817010522_Initial.cs
@@ -1,5 +1,6 @@
 using System;
 using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
@@ -17,9 +18,9 @@ namespace HyperBooru.Migrations
                 name: "Objects",
                 columns: table => new
                 {
-                    ObjectId = table.Column<int>(type: "INTEGER", nullable: false)
-                        .Annotation("Sqlite:Autoincrement", true),
-                    Guid = table.Column<Guid>(type: "TEXT", nullable: false)
+                    ObjectId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    Guid = table.Column<Guid>(type: "uuid", nullable: false)
                 },
                 constraints: table =>
                 {
@@ -30,12 +31,11 @@ namespace HyperBooru.Migrations
                 name: "Media",
                 columns: table => new
                 {
-                    ObjectId = table.Column<int>(type: "INTEGER", nullable: false)
-                        .Annotation("Sqlite:Autoincrement", true),
-                    Checksum = table.Column<string>(type: "TEXT", nullable: false),
-                    MimeType = table.Column<string>(type: "TEXT", nullable: false),
-                    ShortDescription = table.Column<string>(type: "TEXT", nullable: true),
-                    LongDescription = table.Column<string>(type: "TEXT", nullable: true)
+                    ObjectId = table.Column<int>(type: "integer", nullable: false),
+                    Checksum = table.Column<string>(type: "text", nullable: false),
+                    MimeType = table.Column<string>(type: "text", nullable: false),
+                    ShortDescription = table.Column<string>(type: "text", nullable: true),
+                    LongDescription = table.Column<string>(type: "text", nullable: true)
                 },
                 constraints: table =>
                 {
@@ -52,12 +52,10 @@ namespace HyperBooru.Migrations
                 name: "TagDefinitions",
                 columns: table => new
                 {
-                    ObjectId = table.Column<int>(type: "INTEGER", nullable: false)
-                        .Annotation("Sqlite:Autoincrement", true),
-                    Source = table.Column<int>(type: "INTEGER", nullable: false),
-                    Namespace = table.Column<string>(type: "TEXT", nullable: true),
-                    Name = table.Column<string>(type: "TEXT", nullable: false),
-                    TagDefinitionObjectId = table.Column<int>(type: "INTEGER", nullable: true)
+                    ObjectId = table.Column<int>(type: "integer", nullable: false),
+                    Source = table.Column<int>(type: "integer", nullable: false),
+                    Namespace = table.Column<string>(type: "text", nullable: true),
+                    Name = table.Column<string>(type: "text", nullable: false)
                 },
                 constraints: table =>
                 {
@@ -68,26 +66,21 @@ namespace HyperBooru.Migrations
                         principalTable: "Objects",
                         principalColumn: "ObjectId",
                         onDelete: ReferentialAction.Cascade);
-                    table.ForeignKey(
-                        name: "FK_TagDefinitions_TagDefinitions_TagDefinitionObjectId",
-                        column: x => x.TagDefinitionObjectId,
-                        principalTable: "TagDefinitions",
-                        principalColumn: "ObjectId");
                 });
 
             migrationBuilder.CreateTable(
                 name: "UploadedFiles",
                 columns: table => new
                 {
-                    UploadedFileId = table.Column<int>(type: "INTEGER", nullable: false)
-                        .Annotation("Sqlite:Autoincrement", true),
-                    OriginalChecksum = table.Column<string>(type: "TEXT", nullable: false),
-                    Filename = table.Column<string>(type: "TEXT", nullable: true),
-                    UploadTime = table.Column<DateTime>(type: "TEXT", nullable: false),
-                    LastAccessTime = table.Column<DateTime>(type: "TEXT", nullable: true),
-                    LastWriteTime = table.Column<DateTime>(type: "TEXT", nullable: true),
-                    CreateTime = table.Column<DateTime>(type: "TEXT", nullable: true),
-                    MediaObjectId = table.Column<int>(type: "INTEGER", nullable: false)
+                    UploadedFileId = table.Column<int>(type: "integer", nullable: false)
+                        .Annotation("Npgsql:ValueGenerationStrategy", NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                    OriginalChecksum = table.Column<string>(type: "text", nullable: false),
+                    Filename = table.Column<string>(type: "text", nullable: true),
+                    UploadTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    LastAccessTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    LastWriteTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    CreateTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    MediaObjectId = table.Column<int>(type: "integer", nullable: false)
                 },
                 constraints: table =>
                 {
@@ -101,14 +94,37 @@ namespace HyperBooru.Migrations
                 });
 
             migrationBuilder.CreateTable(
+                name: "TagDefinitionTagDefinition",
+                columns: table => new
+                {
+                    ImplicitTagsObjectId = table.Column<int>(type: "integer", nullable: false),
+                    TagDefinitionObjectId = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_TagDefinitionTagDefinition", x => new { x.ImplicitTagsObjectId, x.TagDefinitionObjectId });
+                    table.ForeignKey(
+                        name: "FK_TagDefinitionTagDefinition_TagDefinitions_ImplicitTagsObjec~",
+                        column: x => x.ImplicitTagsObjectId,
+                        principalTable: "TagDefinitions",
+                        principalColumn: "ObjectId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_TagDefinitionTagDefinition_TagDefinitions_TagDefinitionObje~",
+                        column: x => x.TagDefinitionObjectId,
+                        principalTable: "TagDefinitions",
+                        principalColumn: "ObjectId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
                 name: "Tags",
                 columns: table => new
                 {
-                    ObjectId = table.Column<int>(type: "INTEGER", nullable: false)
-                        .Annotation("Sqlite:Autoincrement", true),
-                    TagDefinitionObjectId = table.Column<int>(type: "INTEGER", nullable: false),
-                    CreateTime = table.Column<DateTime>(type: "TEXT", nullable: false),
-                    TargetObjectId = table.Column<int>(type: "INTEGER", nullable: false)
+                    ObjectId = table.Column<int>(type: "integer", nullable: false),
+                    TagDefinitionObjectId = table.Column<int>(type: "integer", nullable: false),
+                    CreateTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: false),
+                    TargetObjectId = table.Column<int>(type: "integer", nullable: false)
                 },
                 constraints: table =>
                 {
@@ -138,17 +154,17 @@ namespace HyperBooru.Migrations
                 columns: new[] { "ObjectId", "Guid" },
                 values: new object[,]
                 {
-                    { -2, new Guid("716ac11f-135a-433c-84a7-7bdfddbec004") },
-                    { -1, new Guid("cbd871cb-8790-4519-9f74-90d1e13a48a0") }
+                    { -2, new Guid("bab0a0f2-b126-429c-a80e-4f339a1f4bb2") },
+                    { -1, new Guid("e906ff13-ee7d-4eb2-826b-1cf880590f6b") }
                 });
 
             migrationBuilder.InsertData(
                 table: "TagDefinitions",
-                columns: new[] { "ObjectId", "Name", "Namespace", "Source", "TagDefinitionObjectId" },
+                columns: new[] { "ObjectId", "Name", "Namespace", "Source" },
                 values: new object[,]
                 {
-                    { -2, "ingest", null, 0, null },
-                    { -1, "nsfw", null, 0, null }
+                    { -2, "ingest", null, 0 },
+                    { -1, "nsfw", null, 0 }
                 });
 
             migrationBuilder.CreateIndex(
@@ -157,8 +173,8 @@ namespace HyperBooru.Migrations
                 column: "Guid");
 
             migrationBuilder.CreateIndex(
-                name: "IX_TagDefinitions_TagDefinitionObjectId",
-                table: "TagDefinitions",
+                name: "IX_TagDefinitionTagDefinition_TagDefinitionObjectId",
+                table: "TagDefinitionTagDefinition",
                 column: "TagDefinitionObjectId");
 
             migrationBuilder.CreateIndex(
@@ -181,6 +197,9 @@ namespace HyperBooru.Migrations
         protected override void Down(MigrationBuilder migrationBuilder)
         {
             migrationBuilder.DropTable(
+                name: "TagDefinitionTagDefinition");
+
+            migrationBuilder.DropTable(
                 name: "Tags");
 
             migrationBuilder.DropTable(
diff --git a/Migrations/HBContextModelSnapshot.cs b/Migrations/HBContextModelSnapshot.cs
index 06712a6..aac8471 100644
--- a/Migrations/HBContextModelSnapshot.cs
+++ b/Migrations/HBContextModelSnapshot.cs
@@ -4,6 +4,7 @@ using HyperBooru;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
@@ -19,16 +20,21 @@ namespace HyperBooru.Migrations
                 .HasAnnotation("ProductVersion", "7.0.10")
                 .HasAnnotation("Proxies:ChangeTracking", false)
                 .HasAnnotation("Proxies:CheckEquality", false)
-                .HasAnnotation("Proxies:LazyLoading", true);
+                .HasAnnotation("Proxies:LazyLoading", true)
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
 
             modelBuilder.Entity("HyperBooru.HBObject", b =>
                 {
                     b.Property<int>("ObjectId")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("ObjectId"));
 
                     b.Property<Guid>("Guid")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("uuid");
 
                     b.HasKey("ObjectId");
 
@@ -43,29 +49,31 @@ namespace HyperBooru.Migrations
                 {
                     b.Property<int>("UploadedFileId")
                         .ValueGeneratedOnAdd()
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("UploadedFileId"));
 
                     b.Property<DateTime?>("CreateTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.Property<string>("Filename")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<DateTime?>("LastAccessTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.Property<DateTime?>("LastWriteTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.Property<int>("MediaObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.Property<string>("OriginalChecksum")
                         .IsRequired()
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<DateTime>("UploadTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.HasKey("UploadedFileId");
 
@@ -77,10 +85,10 @@ namespace HyperBooru.Migrations
             modelBuilder.Entity("TagDefinitionTagDefinition", b =>
                 {
                     b.Property<int>("ImplicitTagsObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.Property<int>("TagDefinitionObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.HasKey("ImplicitTagsObjectId", "TagDefinitionObjectId");
 
@@ -95,17 +103,17 @@ namespace HyperBooru.Migrations
 
                     b.Property<string>("Checksum")
                         .IsRequired()
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<string>("LongDescription")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<string>("MimeType")
                         .IsRequired()
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<string>("ShortDescription")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.ToTable("Media", (string)null);
                 });
@@ -115,13 +123,13 @@ namespace HyperBooru.Migrations
                     b.HasBaseType("HyperBooru.HBObject");
 
                     b.Property<DateTime>("CreateTime")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("timestamp with time zone");
 
                     b.Property<int>("TagDefinitionObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.Property<int>("TargetObjectId")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.HasIndex("TagDefinitionObjectId");
 
@@ -136,13 +144,13 @@ namespace HyperBooru.Migrations
 
                     b.Property<string>("Name")
                         .IsRequired()
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<string>("Namespace")
-                        .HasColumnType("TEXT");
+                        .HasColumnType("text");
 
                     b.Property<int>("Source")
-                        .HasColumnType("INTEGER");
+                        .HasColumnType("integer");
 
                     b.ToTable("TagDefinitions", (string)null);
 
@@ -150,14 +158,14 @@ namespace HyperBooru.Migrations
                         new
                         {
                             ObjectId = -1,
-                            Guid = new Guid("13399c38-34b8-44a1-ac42-536bd32de96a"),
+                            Guid = new Guid("e906ff13-ee7d-4eb2-826b-1cf880590f6b"),
                             Name = "nsfw",
                             Source = 0
                         },
                         new
                         {
                             ObjectId = -2,
-                            Guid = new Guid("8b9cd13c-422a-4958-b97e-b858ac9301db"),
+                            Guid = new Guid("bab0a0f2-b126-429c-a80e-4f339a1f4bb2"),
                             Name = "ingest",
                             Source = 0
                         });
diff --git a/Pages/TagDefinitions.razor b/Pages/TagDefinitions.razor
index 75e93f9..cb0a17c 100644
--- a/Pages/TagDefinitions.razor
+++ b/Pages/TagDefinitions.razor
@@ -73,11 +73,12 @@
     private TagDefinition? toDelete;
     private TagDefinition? toEditImplicit;
 
-    private IEnumerable<TagDefinition> tagDefinitions =>
+    private TagDefinition[] tagDefinitions =>
         dbFactory.CreateDbContext().TagDefinitions
             .Where(td => td.Source == TagSource.UserTag)
             .OrderBy(td => td.Namespace)
-            .ThenBy(td => td.Name);
+            .ThenBy(td => td.Name)
+            .ToArray();
 
     private void CreateTagDefinition() {
         if(string.IsNullOrEmpty(tagNamespace))
@@ -112,8 +113,7 @@
         if(toEditImplicit is null)
             return;
 
-        foreach(var tagDef in tagDefs)
-            tagService.AddImplicitTag(toEditImplicit, tagDef);
+        tagService.SetImplicitTags(toEditImplicit, tagDefs);
         StateHasChanged();
     }
 }
diff --git a/Server.csproj b/Server.csproj
index df0cb5e..f762884 100644
--- a/Server.csproj
+++ b/Server.csproj
@@ -27,8 +27,8 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.EntityFrameworkCore.Proxies" Version="7.0.10" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.10" />
     <PackageReference Include="Mime-Detective" Version="23.6.1" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="7.0.4" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.5.0" />
   </ItemGroup>
 
diff --git a/Services/ConfigService.cs b/Services/ConfigService.cs
index 6ba3936..814a47b 100644
--- a/Services/ConfigService.cs
+++ b/Services/ConfigService.cs
@@ -1,9 +1,9 @@
 namespace HyperBooru.Services;
 
 public interface IConfigService {
-    public string DataPath      { get; }
-    public string DbPath        { get; }
-    public string MediaBasePath { get; }
+    public string DataPath           { get; }
+    public string DbConnectionString { get; }
+    public string MediaBasePath      { get; }
 
     public string GetPath(Media media);
     public string GetPath(Media media, int width, int height);
@@ -38,8 +38,8 @@ public class ConfigService : IConfigService {
         }
     }
 
-    public string DbPath =>
-        Path.Join(DataPath, $"{AppName}.db");
+    public string DbConnectionString =>
+        config.GetConnectionString("DefaultConnection");
 
     public string MediaBasePath =>
         Path.Join(DataPath, "media");
diff --git a/Services/TagService.cs b/Services/TagService.cs
index da2bb2d..c3b8e14 100644
--- a/Services/TagService.cs
+++ b/Services/TagService.cs
@@ -1,6 +1,8 @@
 using Microsoft.AspNetCore.Components.Web;
 using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.Razor.TagHelpers;
 using Microsoft.EntityFrameworkCore;
+using System.Reflection.Metadata;
 
 namespace HyperBooru.Services;
 
@@ -9,8 +11,8 @@ public interface ITagService {
     public void AddTag(HBObject obj, TagDefinition tagDef);
     public void RemoveTag(Guid obj, Guid tagDef);
     public void RemoveTag(HBObject obj, TagDefinition tagDef);
-    public void AddImplicitTag(TagDefinition tagDef, TagDefinition implicitTagDef);
-    public void RemoveImplicitTag(TagDefinition tagDef, TagDefinition implicitTagDef);
+    public void SetImplicitTags(TagDefinition tagDef, TagDefinition[] implicitTagDefs);
+    public void SetImplicitTags(Guid tagDef, Guid[] implicitTagDefs);
     public void CreateTagDefinition(string name, string? @namespace);
     public void DeleteTagDefinition(TagDefinition tagDef);
     public (TagDefinition tagDefinition, bool isImplicit)[] GetAllTags(Guid obj);
@@ -52,28 +54,27 @@ public class TagService : ITagService {
     public void RemoveTag(HBObject obj, TagDefinition tagDef) =>
         RemoveTag(obj.Guid, tagDef.Guid);
 
-    public void AddImplicitTag(TagDefinition tagDef, TagDefinition implicitTagDef) {
+    public void SetImplicitTags(Guid tagDef, Guid[] implicitTagDefs) {
         using var db = dbFactory.CreateDbContext();
-        db.Entry(tagDef).State = EntityState.Unchanged;
-
-        if(tagDef.ImplicitTags.Select(td => td.Guid).Contains(implicitTagDef.Guid))
-            throw new ArgumentException("Tag definition already contains implicit tag");
-
-        tagDef.ImplicitTags.Add(implicitTagDef);
-        db.SaveChanges();
-    }
+        using var transaction = db.Database.BeginTransaction();
 
-    public void RemoveImplicitTag(TagDefinition tagDef, TagDefinition implicitTagDef) {
-        using var db = dbFactory.CreateDbContext();
-        db.Entry(tagDef).State = EntityState.Unchanged;
+        var tag = db.TagDefinitions.First(td => td.Guid == tagDef);
 
-        if(!tagDef.ImplicitTags.Select(td => td.Guid).Contains(implicitTagDef.Guid))
-            throw new ArgumentException("Tag definition doesn't contain implicit tag");
+        tag.ImplicitTags.RemoveAll(td => !implicitTagDefs.Contains(td.Guid));
+        tag.ImplicitTags.AddRange(
+            db.TagDefinitions
+                .Where(td => implicitTagDefs.Contains(td.Guid))
+                .Where(td => !tag.ImplicitTags
+                    .Select(td => td.Guid)
+                    .Contains(td.Guid)));
 
-        tagDef.ImplicitTags.Remove(implicitTagDef);
         db.SaveChanges();
+        transaction.Commit();
     }
 
+    public void SetImplicitTags(TagDefinition tagDef, TagDefinition[] implicitTagDefs) =>
+        SetImplicitTags(tagDef.Guid, implicitTagDefs.Select(td => td.Guid).ToArray());
+
     public void CreateTagDefinition(string name, string? @namespace) {
         using var db = dbFactory.CreateDbContext();
 
diff --git a/Tag.cs b/Tag.cs
index 810c49c..70d70c9 100644
--- a/Tag.cs
+++ b/Tag.cs
@@ -10,15 +10,15 @@ public enum TagSource {
 }
 
 public class TagDefinition : HBObject {
-    public         TagSource                  Source       { get; set; } = TagSource.Internal;
-    public         string?                    Namespace    { get; set; }
-    public         string                     Name         { get; set; }
-    public virtual List<TagDefinition>        ImplicitTags { get; set; } = new();
+    public         TagSource           Source       { get; set; } = TagSource.Internal;
+    public         string?             Namespace    { get; set; }
+    public         string              Name         { get; set; }
+    public virtual List<TagDefinition> ImplicitTags { get; set; } = new();
 }
 
 public class Tag : HBObject {
     public virtual TagDefinition TagDefinition { get; set; }
-    public         DateTime      CreateTime    { get; set; } = DateTime.Now;
+    public         DateTime      CreateTime    { get; set; } = DateTime.UtcNow;
     public virtual HBObject      Target        { get; set; }
 
     public Tag() {}
diff --git a/appsettings.json b/appsettings.json
index 10f68b8..90977fc 100644
--- a/appsettings.json
+++ b/appsettings.json
@@ -5,5 +5,8 @@
       "Microsoft.AspNetCore": "Warning"
     }
   },
+  "ConnectionStrings": {
+    "DefaultConnection": "Host=127.0.0.1;Database=HyperBooru;Username=hyperbooru;Password=password"
+  },
   "AllowedHosts": "*"
 }