AX.FireTrainingSys/FireTrainingSys/EntityConfigurations/ImageMarkerConfig.cs

using AX.FireTrainingSys.Models;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;

namespace AX.FireTrainingSys.EntityConfigurations
{
    public class ImageMarkerConfig : IEntityTypeConfiguration<ImageMarker>
    {
        public void Configure(EntityTypeBuilder<ImageMarker> entity)
        {
            //组合键
            entity.HasKey(key => new { key.CoursewareId, key.Id });

            entity.Property(e => e.CoursewareId)
                .IsUnicode(false)
                .IsFixedLength();

            entity.Property(e => e.Id)
                .IsUnicode(false);
        }
    }
}