FreeSql 是一个功能强大的 .NETStandard 库，用于对象关系映射程序(O/RM)，便于开发人员能够使用 .NETStandard 对象来处理数据库，不必经常编写大部分数据访问代码。支持 .NETCore 2.1+ 或 .NETFramework 4.6.1+。

Package Name	NuGet	Downloads
FreeSql
FreeSql.Repository
FreeSql.DbContext

特性

• 支持 CodeFirst 迁移；
• 支持 DbFirst 从数据库导入实体类，支持三种模板生成器；
• 采用 ExpressionTree 高性能读取数据；
• 支持深入的类型映射，比如pgsql的数组类型，堪称匠心制作；
• 支持丰富的表达式函数；
• 支持导航属性查询，和延时加载；
• 支持同步/异步数据库操作方法，丰富多彩的链式查询方法；
• 支持读写分离、分表分库，租户设计；
• 支持多种数据库，MySql/SqlServer/PostgreSQL/Oracle/Sqlite；

入门	《Select》 | 《Update》 | 《Insert》 | 《Delete》
新手	《表达式函数》 | 《CodeFirst》 | 《DbFirst》
高手	《Repository》 | 《UnitOfWork》 | 《过滤器》 | 《DbContext》
不朽	《读写分离》 | 《分区分表》 | 《租户》 | 更新日志

Quick start

dotnet add package FreeSql

IFreeSql fsql = new FreeSql.FreeSqlBuilder()
    .UseConnectionString(FreeSql.DataType.MySql, "connectionString")
    .UseAutoSyncStructure(true) //自动同步实体结构到数据库
    .Build();

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 virtual ICollection<Tag> Tags { get; set; }
}
class Song_tag {
    public int Song_id { get; set; }
    public virtual Song Song { get; set; }

    public int Tag_id { get; set; }
    public virtual 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 virtual Tag Parent { get; set; }

    public virtual ICollection<Song> Songs { get; set; }
    public virtual ICollection<Tag> Tags { get; set; }
}

Query

//OneToOne、ManyToOne
var t0 = fsql.Select<Tag>().Where(a => a.Parent.Parent.Name == "粤语").ToList();

//OneToMany
var t1 = fsql.Select<Tag>().Where(a => a.Tags.AsSelect().Any(t => t.Parent.Id == 10)).ToList();

//ManyToMany
var t2 = fsql.Select<Song>().Where(s => s.Tags.AsSelect().Any(t => t.Name == "国语")).ToList();

更多前往Wiki：《Select 查询数据文档》

Lambda

var t3 = f.Select<Song>.Where(a => new[] { 1, 2, 3 }.Contains(a.Id)).ToList();

var t4 = select.Where(a => a.CreateTime.Date == DateTime.Now.Date).ToList();

var t5 = select.OrderBy(a => Guid.NewGuid()).Limit(1).ToList();

更多前往Wiki：《表达式函数》

Repository & UnitOfWork

dotnet add package FreeSql.Repository

using (var unitOfWork = fsql.CreateUnitOfWork()) {

    var songRepository = uow.GetRepository<Song, int>();
    var tagRepository = uow.GetRepository<Tag, int>();

    await songRepository.InsertAsync(new Song());
    await tagRepository.InsertAsync(new Tag());

    uow.Commit();
}

DbContext & DbSet

dotnet add package FreeSql.DbContext

public class SongContext : DbContext {

    public DbSet<Song> Songs { get; set; }
    public DbSet<Song> Tags { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder builder) {
        builder.UseFreeSql(fsql);
    }
}

long id = 0;
using (var ctx = new SongContext()) {
    var song = new Song { };
    await ctx.Songs.AddAsync(song);
    id = song.Id;

    var adds = Enumerable.Range(0, 100).Select(a => new Song { Title = "xxxx" + a, Url = "url222" }).ToList();
    await ctx.Songs.AddRangeAsync(adds);

    for (var a = 0; a < adds.Count; a++)
        adds[a].Title = "dkdkdkdk" + a;

    ctx.Songs.UpdateRange(adds);
    ctx.Songs.RemoveRange(adds.Skip(10).Take(20).ToList());
    ctx.Songs.Update(adds.Last());

    await ctx.SaveChangesAsync();
}

DataFilter & Tenant

public IServiceProvider ConfigureServices(IServiceCollection services) {
    services.AddSingleton<IFreeSql>(fsql);
    services.AddMvc();

    var builder = new ContainerBuilder();

    builder.RegisterFreeRepository(filter => filter
        .Apply<ISoftDelete>("SoftDelete", a => a.IsDeleted == false)
        .Apply<ITenant>("Tenant", a => a.TenantId == 1)
    );

    builder.Populate(services);
    var container = builder.Build();
    return new AutofacServiceProvider(container);
}

Temporary disable:

var songRepository = fsql.GetRepository<Song, int>();

using (songRepository.DataFilter.Disable("Tenant")) {
    //Tenant Invalid
}
//Tenant restore

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

Test code

Contributors

systemhejiyong LambertW