.NET中全新的MongoDb ORM框架 - SqlSugar - Powered by Discuz! Archiver

潘群峰 發表於 2025-7-1 13:02:00

.NET中全新的MongoDb ORM框架 - SqlSugar

.NET中好用的MongoDb ORM很少，选择也很少，所以我打造了一款适合SQL习惯的MongoDb ORM，让用户多一个选择。
<h2 data-first-child="">1、 MongoDB ORM教程</h2>
<h3>1.1 NUGET 安装</h3>
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<pre>SqlSugar.MongoDbCore
SqlSugarCore</pre>
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<h3>1.2 已支持功能</h3>
单表CRUD+分页+排序+简单分组+嵌套文件（类似Json类型）+简单联表
<h3>1.3 创建DB对象</h3>
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<pre>//注册DLL防止找不到DLL（扔在程序启动时）
InstanceFactory.CustomAssemblies = new System.Reflection.Assembly[] {
typeof(SqlSugar.MongoDb.MongoDbProvider).Assembly };

//db对象（用法和sqlsugar入门中一样）
var db = new SqlSugarClient(new ConnectionConfig()
{
 IsAutoCloseConnection = true,
 DbType = DbType.MongoDb,
 ConnectionString = SqlSugarConnectionString

},
it =>
{
 it.Aop.OnLogExecuting = (sql, para) =>
 { //AOP打印SQL
 Console.WriteLine(UtilMethods.GetNativeSql(sql, para));
 };
});

//字符串2种都可以
var ConnectionString = "mongodb://root:123456@222.71.212.3:27017/testDB?authSource=admin";
varConnectionString= "host=222.71.212.3;Port=27017;Database=testDB;Username= root;Password=123456;authSource=admin;replicaSet=";</pre>
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<h3>1.4 实体类定义（重点注意）</h3>
主键定义：继承MongoDbBase里面自定义好了主键
外键定义：设置 ColumnDataType =nameof(ObjectId)
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<pre> //继承的MongoDbBase里面已经有了主键，当然你也可以复制出来不用基类
public class Student:MongoDbBase
{
 //主键在基类，也可以自个复制出来不用基类
 public string Name { get; set; }

 //外键需要设置ObjectId类型不然存储会的是string

 public string SchoolId { get; set; }
}

//MongoDbBase是ORM自带的一个类，方便你不定义主键
public class MongoDbBase
{

public string Id { get; set; }
}</pre>
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<h2>2、CRUD用例</h2>
<h3>2.1 插入</h3>
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<pre>//插入无返回值
db.Insertable(data).ExecuteCommand();

//插入并将主键赋值到实体
db.Insertable(data).ExecuteCommandIdentityIntoEntity();

//插入返回IDS
var ids= db.Insertable(data).ExecuteReturnPkList<string>();</pre>
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<h3>2.2 查询</h3>
MongoDb一般是单表操作比较多，官方并不推荐联表操作一般用json做嵌套文档比较多
不过SqlSugar也支持了联表
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<pre>//简单查询
var data2 = db.Queryable<Student>().Where(it => it.Book.Price == 1).ToList();

//分页
var count = 0;
var list = db.Queryable<School>().OrderBy(it=>it.Name).ToPageList(1,2,ref count);

//json类型（实体定义isjson）
var data2 = db.Queryable<Student>().Where(it => it.Book.Price == 1).ToList();

//简单联表（目前只能支持这种基本联表）
var list = db.Queryable<Student>()
.LeftJoin<School>((x, y) => x.SchoolId == y.Id)
.LeftJoin<School>((x, y, z) => x.SchoolId == z.Id)
.Where((x, y) =>y.Name == "TestSchool")
.Select((x, y,z) => new
{
 StudentName = x.Name,
 SchoolName = y.Name,
 SchoolName2=z.Name
}).ToList();

//简单分组查询
var list14 = db.Queryable<OrderInfo>()
.GroupBy(it => new { it.Name ,it.Price })
.Select(it => new
{
 key = it.Name,
 Prie=it.Price,
 groupCount = SqlFunc.AggregateCount(it.Id),
 max = SqlFunc.AggregateMax(it.Id),
 min = SqlFunc.AggregateMin(it.Id)
}).ToList();

//目前不支持导航查询和子查询</pre>
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<h3>2.3 删除</h3>
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<pre>//根据主键岀队string [] ids= [...]
db.Deleteable<Student>().In(ids).ExecuteCommandAsync()
//根据实体删除,实体要有主键 var delrow = db.Deleteable(data).ExecuteCommand();</pre>
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<h3>2.4 更新</h3>
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<pre> var updateRow2 = db.Updateable(new List<OrderInfo>()
{
 new OrderInfo() { Id = ids.First(),Name="a31",Price=11},
 new OrderInfo() { Id = ids.Last(),Name="a41"}
})
.ExecuteCommand();

var updateRow3= db.Updateable<OrderInfo>()
.SetColumns(it=>it.Name=="xx")
.Where(it=> it.Id == id)
.ExecuteCommand();</pre>
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<h3>2.5 使用原生SQL</h3>
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<pre>db.Ado.ExecuteCommand(@"insertMany UnitSchool123131[{ ""Name"" : ""XX大学"" }]");

//C#对象构造
var documents = new[]
{
new BsonDocument { { "Name", "XX大学" } }
};
var bsonArray = new BsonArray(documents).ToJson();
var cmd = $"insertMany UnitSchool123131 {json}";
db.Ado.ExecuteCommand(cmd);

//查询
var list=db.Ado.SqlQuery<T>(cmd);
var dt=db.Ado.GetDataTable(cmd);

//sqlsugar中获取原生对象
IMongoDatabase rdb= ((MongoDbConnection)db.Ado.Connection).GetDatabase();
//IMongoDatabase 是什么东西？
//var client = new MongoClient("mongodb://localhost:27017");
//IMongoDatabase database = client.GetDatabase("TestDatabase");</pre>
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<h2>3、源码DEM</h2>
https://github.com/DotNetNext/SqlSugar 
<img src="https://img2024.cnblogs.com/blog/746906/202507/746906-20250701125746288-1798810326.png" alt="" loading="lazy">
DEMO 下载： https://github.com/DotNetNext/SqlSugar  
 
  
来源：https://www.cnblogs.com/sunkaixuan/p/18959484

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.NET中全新的MongoDb ORM框架 - SqlSugar