fix: make usernames unique

Author: buehler

MumbleApi/Database/DataContext.cs

@@ -42,26 +42,31 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
             .WithOne(p => p.Creator)
             .OnDelete(DeleteBehavior.Cascade);
 
+        modelBuilder
+            .Entity<User>()
+            .HasIndex(u => u.Username)
+            .IsUnique();
+
         modelBuilder
             .Entity<User>()
             .ToTable(t =>
                 t.HasCheckConstraint(
                     "chk_avatar_type",
-                    @"(avatar_url is null and avatar_media_type is null) or (avatar_url is not null and avatar_media_type is not null)"));
+                    "(avatar_url is null and avatar_media_type is null) or (avatar_url is not null and avatar_media_type is not null)"));
 
         modelBuilder
             .Entity<Post>()
             .ToTable(t =>
                 t.HasCheckConstraint(
                     "chk_media_data",
-                    @"(media_url is null and media_type is null) or (media_url is not null and media_type is not null)"));
+                    "(media_url is null and media_type is null) or (media_url is not null and media_type is not null)"));
 
         modelBuilder
             .Entity<Post>()
             .ToTable(t =>
                 t.HasCheckConstraint(
                     "chk_post_content",
-                    @"(media_url is not null and media_type is not null) or text is not null"));
+                    "(media_url is not null and media_type is not null) or text is not null"));
 
         modelBuilder
             .Entity<Post>()

MumbleApi/Migrations/20240125091156_MakeUsernameUnique.Designer.cs

@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace MumbleApi.Migrations
+{
+    /// <inheritdoc />
+    public partial class MakeUsernameUnique : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateIndex(
+                name: "ix_users_username",
+                table: "users",
+                column: "username",
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "ix_users_username",
+                table: "users");
+        }
+    }
+}

MumbleApi/Migrations/20240125091156_MakeUsernameUnique.cs

@@ -17,7 +17,7 @@ protected override void BuildModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "7.0.5")
+                .HasAnnotation("ProductVersion", "8.0.1")
                 .HasAnnotation("Relational:MaxIdentifierLength", 63);
 
             NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
@@ -140,6 +140,10 @@ protected override void BuildModel(ModelBuilder modelBuilder)
                     b.HasKey("Id")
                         .HasName("pk_users");
 
+                    b.HasIndex("Username")
+                        .IsUnique()
+                        .HasDatabaseName("ix_users_username");
+
                     b.ToTable("users", null, t =>
                         {
                             t.HasCheckConstraint("chk_avatar_type", "(avatar_url is null and avatar_media_type is null) or (avatar_url is not null and avatar_media_type is not null)");