Make it work on MySQL Again

Author: linkdotnet

Directory.Packages.props

@@ -8,12 +8,12 @@
   </ItemGroup>
   <ItemGroup Label="Infrastructure">
 		<PackageVersion Include="Azure.Storage.Blobs" Version="12.22.2" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore" Version="9.0.0-rc.2.24474.1" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.0-rc.2.24474.1" />
-    <PackageVersion Include="Microsoft.EntityFrameworkCore.SqlServer" Version="9.0.0-rc.2.24474.1" />
+		<PackageVersion Include="Microsoft.EntityFrameworkCore" Version="8.0.10" />
+		<PackageVersion Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.10" />
+		<PackageVersion Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.10" />
     <PackageVersion Include="Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions" Version="9.0.0-rc.2.24474.3" />
     <PackageVersion Include="MongoDB.Driver" Version="2.30.0" />
-    <PackageVersion Include="MySql.EntityFrameworkCore" Version="9.0.0-preview" />
+    <PackageVersion Include="MySql.EntityFrameworkCore" Version="8.0.8" />
     <PackageVersion Include="RavenDB.Client" Version="6.2.1" />
   </ItemGroup>
   <ItemGroup Label="Web">
@@ -41,4 +41,4 @@
     <PackageVersion Include="xunit.v3" Version="0.5.0-pre.27" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.0.0-pre.42" />
   </ItemGroup>
-</Project>
+</Project>

src/LinkDotNet.Blog.Infrastructure/Persistence/Sql/Mapping/BlogPostConfiguration.cs

@@ -1,11 +1,20 @@
+using System;
+using System.Text.Json;
 using LinkDotNet.Blog.Domain;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using MySql.EntityFrameworkCore.Extensions;
 
 namespace LinkDotNet.Blog.Infrastructure.Persistence.Sql.Mapping;
 
 internal sealed class BlogPostConfiguration : IEntityTypeConfiguration<BlogPost>
 {
+    private readonly DatabaseFacade databaseFacade;
+
+    public BlogPostConfiguration(DatabaseFacade databaseFacade)
+        => this.databaseFacade = databaseFacade;
+
     public void Configure(EntityTypeBuilder<BlogPost> builder)
     {
         builder.HasKey(c => c.Id);
@@ -19,7 +28,14 @@ public void Configure(EntityTypeBuilder<BlogPost> builder)
         builder.Property(x => x.ShortDescription).IsRequired();
         builder.Property(x => x.Likes).IsRequired();
         builder.Property(x => x.IsPublished).IsRequired();
-        builder.Property(x => x.Tags).HasMaxLength(2096);
+
+        var tags = builder.Property(x => x.Tags).HasMaxLength(2048);
+
+        if (databaseFacade.IsMySql())
+        {
+            // MySQL EF Driver does not support arrays out of the box so we have to json serialize and deserialize them
+            tags.HasConversion<JsonArrayConverter>();
+        }
 
         builder.HasIndex(x => new { x.IsPublished, x.UpdatedDate })
             .HasDatabaseName("IX_BlogPosts_IsPublished_UpdatedDate")

src/LinkDotNet.Blog.Infrastructure/Persistence/Sql/Mapping/JsonArrayConverter.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace LinkDotNet.Blog.Infrastructure.Persistence.Sql.Mapping;
+
+internal sealed class JsonArrayConverter : ValueConverter<IList<string>, string>
+{
+    public JsonArrayConverter() : base(
+        v => JsonSerializer.Serialize(v, JsonSerializerOptions.Default),
+        v => JsonSerializer.Deserialize<string[]>(v, JsonSerializerOptions.Default) ??
+             Array.Empty<string>())
+    {
+    }
+}

src/LinkDotNet.Blog.Infrastructure/Persistence/Sql/Mapping/SimilarBlogPostConfiguration.cs

@@ -1,17 +1,33 @@
 using LinkDotNet.Blog.Domain;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using MySql.EntityFrameworkCore.Extensions;
 
 namespace LinkDotNet.Blog.Infrastructure.Persistence.Sql.Mapping;
 
 internal sealed class SimilarBlogPostConfiguration : IEntityTypeConfiguration<SimilarBlogPost>
 {
+    private readonly DatabaseFacade database;
+
+    public SimilarBlogPostConfiguration(DatabaseFacade database)
+        => this.database = database;
+
     public void Configure(EntityTypeBuilder<SimilarBlogPost> builder)
     {
         builder.HasKey(b => b.Id);
         builder.Property(b => b.Id)
             .IsUnicode(false)
             .ValueGeneratedOnAdd();
-        builder.Property(b => b.SimilarBlogPostIds).HasMaxLength(450 * 3).IsRequired();
+
+        var similarBlogPosts = builder
+            .Property(b => b.SimilarBlogPostIds)
+            .HasMaxLength(450 * 3)
+            .IsRequired();
+
+        if (database.IsMySql())
+        {
+            similarBlogPosts.HasConversion<JsonArrayConverter>();
+        }
     }
 }