FreeSql 提供使用 Fluent Api, 在外部配置实体的数据库特性,Fluent Api 的方法命名与特性名保持一致,如下:

fsql.CodeFirst
    .ConfigEntity<TestFluenttb1>(a => 
    {
        a.Name("xxdkdkdk1");
        a.Property(b => b.Id).Name("Id22").IsIdentity(true);
        a.Property(b => b.name).DbType("varchar(100)").IsNullable(true);
    })
    .ConfigEntity<TestFluenttb2>(a =>
    {
        a.Name("xxdkdkdk2");
        a.Property(b => b.Id).Name("Id22").IsIdentity(true);
        a.Property(b => b.name).DbType("varchar(100)").IsNullable(true);
    });

//以下为实体类
class TestFluenttb1 {
    public int Id { get; set; }
    public string name { get; set; } = "defaultValue";
}

[Table(Name = "cccccdddwww")]
class TestFluenttb2 {
    public int Id { get; set; }
    public string name { get; set; } = "defaultValue";
}
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fsql 是一个 IFreeSql 对象

这段配置尽量只执行一次,避免性能损耗

参考:《实体特性说明》

FreeSql.DbContext v1.4.0+ 实现了 EfCore FluentApi 99% 相似的语法

fsql.CodeFirst.Entity<Song>(eb => {
    eb.ToTable("tb_song");
    eb.Ignore(a => a.Field1);
    eb.Property(a => a.Title).HasColumnType("varchar(50)").IsRequired();
    eb.Property(a => a.Url).HasMaxLength(100);

    eb.Property(a => a.RowVersion).IsRowVersion();
    eb.Property(a => a.CreateTime).HasDefaultValueSql("current_timestamp");

    eb.HasKey(a => a.Id);
    eb.HasIndex(a => new { a.Id, a.Title }).IsUnique().HasName("idx_xxx11");

    //一对多、多对一
    eb.HasOne(a => a.Type).HasForeignKey(a => a.TypeId).WithMany(a => a.Songs);

    //多对多
    eb.HasMany(a => a.Tags).WithMany(a => a.Songs, typeof(Song_tag));
});

fsql.CodeFirst.Entity<SongType>(eb => {
    eb.HasMany(a => a.Songs).WithOne(a => a.Type).HasForeignKey(a => a.TypeId);
    eb.HasData(new[]
    {
        new SongType
        {
            Id = 1,
            Name = "流行",
            Songs = new List<Song>(new[]
            {
                new Song{ Title = "真的爱你" },
                new Song{ Title = "爱你一万年" },
            })
        },
        new SongType
        {
            Id = 2,
            Name = "乡村",
            Songs = new List<Song>(new[]
            {
                new Song{ Title = "乡里乡亲" },
            })
        },
    });
});

public class SongType {
    public int Id { get; set; }
    public string Name { get; set; }

    public List<Song> Songs { get; set; }
}
public class Song {
    [Column(IsIdentity = true)]
    public int Id { get; set; }
    public string Title { get; set; }
    public string Url { get; set; }
    public DateTime CreateTime { get; set; }

    public int TypeId { get; set; }
    public SongType Type { get; set; }

    public int Field1 { get; set; }
    public long RowVersion { get; set; }
}
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# 优先级

数据库特性 > 实体特性 > FluentApi(配置特性) > Aop(配置特性)