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🦄 dotnet ORM, Mysql orm, Postgresql orm, SqlServer orm, Oracle orm, Sqlite orm, Odbc orm, 达梦 orm, 人大金仓 orm, MsAccess orm.
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FreeSql 是功能强大的对象关系映射技术(O/RM),支持 .NETCore 2.1+ 或 .NETFramework 4.0+ 或 Xamarin

扶摇直上,至强ORM只为自由编码;鹏程万里,至简Linq可使保留黑发;横批:FreeSql(诗人:Coder)

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🐮 Features

  • 支持 CodeFirst 迁移,哪怕使用 Access 数据库也支持;
  • 支持 DbFirst 从数据库导入实体类,安装实体类生成工具
  • 支持 深入的类型映射,比如pgsql的数组类型;
  • 支持 丰富的表达式函数,以及灵活的自定义解析;
  • 支持 导航属性一对多、多对多贪婪加载,以及延时加载;
  • 支持 读写分离、分表分库、过滤器、乐观锁、悲观锁;
  • 支持 MySql/SqlServer/PostgreSQL/Oracle/Sqlite/达梦/人大金仓/Access;

📚 Documentation

《新人学习指引》 | 《Select》 | 《Update》 | 《Insert》 | 《Delete》
《表达式函数》 | 《CodeFirst》 | 《DbFirst》 | 《过滤器》
《Repository》 | 《UnitOfWork》 | 《AOP》 | 《DbContext》
《读写分离》 | 《分区分表》 | 《黑科技》 | 《常见问题》 | 更新日志

FreeSql 提供多种使用习惯,请根据实际情况选择团队合适的一种:

学习项目

🚀 Quick start

dotnet add package FreeSql.Provider.Sqlite

static IFreeSql fsql = new FreeSql.FreeSqlBuilder()
  .UseConnectionString(FreeSql.DataType.Sqlite, @"Data Source=document.db")
  .UseAutoSyncStructure(true) //自动同步实体结构到数据库
  .Build(); //请务必定义成 Singleton 单例模式

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 ICollection<Tag> Tags { get; set; }
}
class Song_tag {
  public int Song_id { get; set; }
  public Song Song { get; set; }
  
  public int Tag_id { get; set; }
  public Tag Tag { get; set; }
}
class Tag {
  [Column(IsIdentity = true)]
  public int Id { get; set; }
  public string Name { get; set; }
  
  public int? Parent_id { get; set; }
  public Tag Parent { get; set; }
  
  public ICollection<Song> Songs { get; set; }
  public ICollection<Tag> Tags { get; set; }
}

🔎 Query

//OneToOne、ManyToOne
fsql.Select<Tag>().Where(a => a.Parent.Parent.Name == "粤语").ToList();

//OneToMany
fsql.Select<Tag>().IncludeMany(a => a.Tags, then => then.Where(sub => sub.Name == "xxx")).ToList();

//ManyToMany
fsql.Select<Song>()
  .IncludeMany(a => a.Tags, then => then.Where(sub => sub.Name == "xxx"))
  .Where(s => s.Tags.AsSelect().Any(t => t.Name == "国语"))
  .ToList();

//Other
fsql.Select<Xxx>()
  .Where(a => a.IsDelete == 0)
  .WhereIf(keyword != null, a => a.UserName.Contains(keyword))
  .WhereIf(role_id > 0, a => a.RoleId == role_id)
  .Where(a => a.Nodes.AsSelect().Any(t => t.Parent.Id == t.UserId))
  .Count(out var total)
  .Page(page, size)
  .OrderByDescending(a => a.Id)
  .ToList()

More..

fsql.Select<Song>().Where(a => new[] { 1, 2, 3 }.Contains(a.Id)).ToList();

fsql.Select<Song>().Where(a => a.CreateTime.Date == DateTime.Today).ToList();

fsql.Select<Song>().OrderBy(a => Guid.NewGuid()).Limit(10).ToList();

More..

🚁 Repository

dotnet add package FreeSql.Repository

[Transactional]
public void Add() {
  var repo = ioc.GetService<BaseRepository<Tag>>();
  repo.DbContextOptions.EnableAddOrUpdateNavigateList = true;

  var item = new Tag {
    Name = "testaddsublist",
    Tags = new[] {
      new Tag { Name = "sub1" },
      new Tag { Name = "sub2" }
    }
  };
  repo.Insert(item);
}

参考:在 asp.net core 中使用 TransactionalAttribute + UnitOfWorkManager 实现多种事务传播

💪 Performance

FreeSql Query & Dapper Query

Elapsed: 00:00:00.6733199; Query Entity Counts: 131072; ORM: Dapper

Elapsed: 00:00:00.4554230; Query Tuple Counts: 131072; ORM: Dapper

Elapsed: 00:00:00.6846146; Query Dynamic Counts: 131072; ORM: Dapper

Elapsed: 00:00:00.6818111; Query Entity Counts: 131072; ORM: FreeSql*

Elapsed: 00:00:00.6060042; Query Tuple Counts: 131072; ORM: FreeSql*

Elapsed: 00:00:00.4211323; Query ToList<Tuple> Counts: 131072; ORM: FreeSql*

Elapsed: 00:00:01.0236285; Query Dynamic Counts: 131072; ORM: FreeSql*

FreeSql ToList & Dapper Query

Elapsed: 00:00:00.6707125; ToList Entity Counts: 131072; ORM: FreeSql*

Elapsed: 00:00:00.6495301; Query Entity Counts: 131072; ORM: Dapper

More..

👯 Contributors

systemhejiyongLambertWmypeng1985stulzqmovingsamALer-Rzouql、 深圳|凉茶、 densen2014LiaoLiaoWuJuhd2ytky753feijie999

(QQ群:4336577)

💕 Donation

L*y 58元、花花 88元、麦兜很乖 50元、网络来者 2000元、John 99.99元、alex 666元、bacongao 36元、无名 100元、Eternity 188元、无名 10元、⌒.Helper~..oO 66元、习惯与被习惯 100元、无名 100元、蔡易喋 88.88元、中讯科技 1000元、Good Good Work 24元、炽焰 6.6元、Nothing 100元

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