myAi/Apis/myai-data/Data/MyAiDbContext.cs

using MyAi.Data.Entities;
using Microsoft.EntityFrameworkCore;

namespace MyAi.Data;

public sealed class MyAiDbContext : DbContext
{
    public const string SchemaName = "myAi";
    public const string MigrationTableName = "_Migrations";

    public MyAiDbContext(DbContextOptions<MyAiDbContext> options) : base(options) { }

    public DbSet<TemplateEntity> Templates => Set<TemplateEntity>();

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.HasDefaultSchema(SchemaName);

        modelBuilder.Entity<TemplateEntity>(entity =>
        {
            entity.ToTable("Templates");
            entity.HasKey(x => new { x.Key, x.Language });
            entity.Property(x => x.Key).HasMaxLength(128);
            entity.Property(x => x.Language).HasMaxLength(8);
            entity.Property(x => x.Value).IsRequired();
            entity.Property(x => x.Description).HasMaxLength(500).HasDefaultValue(string.Empty);
            entity.Property(x => x.UpdatedAt).HasDefaultValueSql("SYSUTCDATETIME()");
        });
    }
}