discord-bot/CompatBot/Database/PrimaryKeyConvention.cs

using System;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Internal;

namespace CompatBot.Database
{
    internal static class PrimaryKeyConvention
    {
        public static void ConfigureDefaultPkConvention(this ModelBuilder modelBuilder, string keyProperty = "Id")
        {
            if (string.IsNullOrEmpty(keyProperty))
                throw new ArgumentException(nameof(keyProperty));

            foreach (var entity in modelBuilder.Model.GetEntityTypes())
            {
                var pk = entity.GetKeys().FirstOrDefault(k => k.IsPrimaryKey());
                pk?.SetName(keyProperty);
            }
        }

        public static void ConfigureNoPkConvention(this ModelBuilder modelBuilder)
        {
            foreach (var entity in modelBuilder.Model.GetEntityTypes())
            {
                var pk = entity.GetKeys().FirstOrDefault(k => k.IsPrimaryKey());
                if (pk != null)
                    entity.RemoveKey(pk.Properties);
            }
        }
    }
}