mirror of
https://github.com/nsnail/FreeSql.git
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7f3aa84ffe
- 优化 导航属性 ManyToOne 名称查找规则； - 增加 IFreeSql.Aop 属性，未来所有拦截方法都在这里，第一期支持如下： * 监控 ToList 返回的的数据，用于拦截重新装饰； * 监视 Where，包括 select/update/delete，返回值 true 时可使上层不被执行； * 可自定义解析表达式； - 增加 ISelect.TractToList，用于单次跟踪或审核实体； - 优化 FreeSql.DbContext SaveChanges；
204 lines
7.8 KiB
Markdown
204 lines
7.8 KiB
Markdown
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+。
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| Package Name | NuGet | Downloads |
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|--------------| ------- | ---- |
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| FreeSql | [](https://www.nuget.org/packages/FreeSql) | [](https://www.nuget.org/stats/packages/FreeSql?groupby=Version) |
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| [FreeSql.Repository](https://github.com/2881099/FreeSql/wiki/Repository) | [](https://www.nuget.org/packages/FreeSql.Repository) | [](https://www.nuget.org/stats/packages/FreeSql.Repository?groupby=Version) |
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| [FreeSql.DbContext](https://github.com/2881099/FreeSql/wiki/DbContext) | [](https://www.nuget.org/packages/FreeSql.DbContext) | [](https://www.nuget.org/stats/packages/FreeSql.DbContext?groupby=Version) |
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# 特性
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- [x] 支持 CodeFirst 迁移；
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- [x] 支持 DbFirst 从数据库导入实体类，支持三种模板生成器；
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- [x] 采用 ExpressionTree 高性能读取数据；
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- [x] 支持深入的类型映射，比如pgsql的数组类型，堪称匠心制作；
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- [x] 支持丰富的表达式函数；
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- [x] 支持导航属性查询，和延时加载；
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- [x] 支持同步/异步数据库操作方法，丰富多彩的链式查询方法；
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- [x] 支持读写分离、分表分库，租户设计；
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- [x] 支持多种数据库，MySql/SqlServer/PostgreSQL/Oracle/Sqlite；
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| - | - |
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| 入门 | [《Select》](https://github.com/2881099/FreeSql/wiki/%e6%9f%a5%e8%af%a2) \| [《Update》](https://github.com/2881099/FreeSql/wiki/%e4%bf%ae%e6%94%b9) \| [《Insert》](https://github.com/2881099/FreeSql/wiki/%e6%b7%bb%e5%8a%a0) \| [《Delete》](https://github.com/2881099/FreeSql/wiki/%e5%88%a0%e9%99%a4) |
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| 新手 | [《表达式函数》](https://github.com/2881099/FreeSql/wiki/%e8%a1%a8%e8%be%be%e5%bc%8f%e5%87%bd%e6%95%b0) \| [《CodeFirst》](https://github.com/2881099/FreeSql/wiki/CodeFirst) \| [《DbFirst》](https://github.com/2881099/FreeSql/wiki/DbFirst) |
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| 高手 | [《Repository》](https://github.com/2881099/FreeSql/wiki/Repository) \| [《UnitOfWork》](https://github.com/2881099/FreeSql/wiki/%e5%b7%a5%e4%bd%9c%e5%8d%95%e5%85%83) \| [《过滤器》](https://github.com/2881099/FreeSql/wiki/%e8%bf%87%e6%bb%a4%e5%99%a8) \| [《DbContext》](https://github.com/2881099/FreeSql/wiki/DbContext) |
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| 不朽 | [《读写分离》](https://github.com/2881099/FreeSql/wiki/%e8%af%bb%e5%86%99%e5%88%86%e7%a6%bb) \| [《分区分表》](https://github.com/2881099/FreeSql/wiki/%e5%88%86%e5%8c%ba%e5%88%86%e8%a1%a8) \| [《租户》](https://github.com/2881099/FreeSql/wiki/%e7%a7%9f%e6%88%b7) \| [更新日志](https://github.com/2881099/FreeSql/wiki/%e6%9b%b4%e6%96%b0%e6%97%a5%e5%bf%97) |
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# Quick start
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> dotnet add package FreeSql
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```csharp
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IFreeSql fsql = new FreeSql.FreeSqlBuilder()
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.UseConnectionString(FreeSql.DataType.MySql, "connectionString")
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.UseAutoSyncStructure(true) //自动同步实体结构到数据库
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.Build();
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class Song {
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[Column(IsIdentity = true)]
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public int Id { get; set; }
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public string Title { get; set; }
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public string Url { get; set; }
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public DateTime CreateTime { get; set; }
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public virtual ICollection<Tag> Tags { get; set; }
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}
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class Song_tag {
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public int Song_id { get; set; }
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public virtual Song Song { get; set; }
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public int Tag_id { get; set; }
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public virtual Tag Tag { get; set; }
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}
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class Tag {
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[Column(IsIdentity = true)]
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public int Id { get; set; }
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public string Name { get; set; }
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public int? Parent_id { get; set; }
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public virtual Tag Parent { get; set; }
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public virtual ICollection<Song> Songs { get; set; }
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public virtual ICollection<Tag> Tags { get; set; }
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}
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```
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# Query
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```csharp
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//OneToOne、ManyToOne
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var t0 = fsql.Select<Tag>().Where(a => a.Parent.Parent.Name == "粤语").ToList();
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//OneToMany
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var t1 = fsql.Select<Tag>().Where(a => a.Tags.AsSelect().Any(t => t.Parent.Id == 10)).ToList();
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//ManyToMany
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var t2 = fsql.Select<Song>().Where(s => s.Tags.AsSelect().Any(t => t.Name == "国语")).ToList();
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```
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更多前往Wiki：[《Select 查询数据文档》](https://github.com/2881099/FreeSql/wiki/%e6%9f%a5%e8%af%a2)
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# Lambda
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```csharp
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var t3 = f.Select<Song>.Where(a => new[] { 1, 2, 3 }.Contains(a.Id)).ToList();
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```
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```csharp
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var t4 = select.Where(a => a.CreateTime.Date == DateTime.Now.Date).ToList();
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```
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```csharp
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var t5 = select.OrderBy(a => Guid.NewGuid()).Limit(1).ToList();
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```
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更多前往Wiki：[《表达式函数》](https://github.com/2881099/FreeSql/wiki/%e8%a1%a8%e8%be%be%e5%bc%8f%e5%87%bd%e6%95%b0)
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# Repository & UnitOfWork
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> dotnet add package FreeSql.Repository
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```csharp
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using (var unitOfWork = fsql.CreateUnitOfWork()) {
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var songRepository = uow.GetRepository<Song, int>();
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var tagRepository = uow.GetRepository<Tag, int>();
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await songRepository.InsertAsync(new Song());
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await tagRepository.InsertAsync(new Tag());
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uow.Commit();
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}
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```
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# DbContext & DbSet
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> dotnet add package FreeSql.DbContext
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```csharp
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public class SongContext : DbContext {
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public DbSet<Song> Songs { get; set; }
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public DbSet<Song> Tags { get; set; }
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protected override void OnConfiguring(DbContextOptionsBuilder builder) {
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builder.UseFreeSql(fsql);
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}
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}
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long id = 0;
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using (var ctx = new SongContext()) {
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var song = new Song { };
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await ctx.Songs.AddAsync(song);
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id = song.Id;
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var adds = Enumerable.Range(0, 100).Select(a => new Song { Title = "xxxx" + a, Url = "url222" }).ToList();
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await ctx.Songs.AddRangeAsync(adds);
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for (var a = 0; a < adds.Count; a++)
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adds[a].Title = "dkdkdkdk" + a;
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ctx.Songs.UpdateRange(adds);
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ctx.Songs.RemoveRange(adds.Skip(10).Take(20).ToList());
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ctx.Songs.Update(adds.Last());
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await ctx.SaveChangesAsync();
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}
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```
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# DataFilter & Tenant
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```csharp
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public IServiceProvider ConfigureServices(IServiceCollection services) {
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services.AddSingleton<IFreeSql>(fsql);
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services.AddMvc();
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var builder = new ContainerBuilder();
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builder.RegisterFreeRepository(filter => filter
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.Apply<ISoftDelete>("SoftDelete", a => a.IsDeleted == false)
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.Apply<ITenant>("Tenant", a => a.TenantId == 1)
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);
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builder.Populate(services);
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var container = builder.Build();
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return new AutofacServiceProvider(container);
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}
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```
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Temporary disable:
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```csharp
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var songRepository = fsql.GetRepository<Song, int>();
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using (songRepository.DataFilter.Disable("Tenant")) {
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//Tenant Invalid
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}
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//Tenant restore
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```
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# Performance
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FreeSql Query & Dapper Query
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```shell
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Elapsed: 00:00:00.6733199; Query Entity Counts: 131072; ORM: Dapper
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Elapsed: 00:00:00.4554230; Query Tuple Counts: 131072; ORM: Dapper
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Elapsed: 00:00:00.6846146; Query Dynamic Counts: 131072; ORM: Dapper
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Elapsed: 00:00:00.6818111; Query Entity Counts: 131072; ORM: FreeSql*
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Elapsed: 00:00:00.6060042; Query Tuple Counts: 131072; ORM: FreeSql*
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Elapsed: 00:00:00.4211323; Query ToList<Tuple> Counts: 131072; ORM: FreeSql*
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Elapsed: 00:00:01.0236285; Query Dynamic Counts: 131072; ORM: FreeSql*
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```
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FreeSql ToList & Dapper Query
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```shell
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Elapsed: 00:00:00.6707125; ToList Entity Counts: 131072; ORM: FreeSql*
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Elapsed: 00:00:00.6495301; Query Entity Counts: 131072; ORM: Dapper
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```
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[Test code](FreeSql.Tests.PerformanceTests/MySqlAdoTest.cs)
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# Contributors
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[systemhejiyong](https://github.com/systemhejiyong)
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[LambertW](https://github.com/LambertW)
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