DapperSqlMaker 链式查询扩展
https://github.com/mumumutou/DapperSqlMaker 欢迎dalao加入来完善
Nuget安装:> Install-Package DapperSqlMaker -Version 0.1.6
Dapper-1.50.2\Dapper
Dapper-1.50.2\Dapper.Contrib
Nuget安装:> 未发布
依赖项:
Dapper (>= 1.50.0)
Dapper.Contrib (>= 1.50.0)
查询 TestsDapperSqlMaker\DapperSqlMaker.Test\ SelectDapperSqlMakerTest.cs
添加 TestsDapperSqlMaker\DapperSqlMaker.Test\ InsertDapperSqlMakerTest.cs
更新 TestsDapperSqlMaker\DapperSqlMaker.Test\ UpdateDapperSqlMakerTest.cs
删除 TestsDapperSqlMaker\DapperSqlMaker.Test\ DeleteDapperSqlMakerTest.cs
上下文类 TestsDapperSqlMaker\DbDapperSqlMaker\ LockDapperUtilsqlite.cs
public ActionResult Load(int page, int rows ,string serh)
{
serh = $"%{serh}%";
int records;
var where = PredicateBuilder.WhereStart<LockPers>();
where = where.And( m => m.IsDel != true );
if (!string.IsNullOrWhiteSpace(serh)) {
where = where.And( m => (m.Name.Contains(serh) || m.Prompt.Contains(serh) ) );
}
var query = LockDapperUtilsqlite<LockPers>
.Selec().Column(p => new { t = "datetime(a.InsertTime) as InsertTimestr"
, p.Id, p.Name, p.Content, p.Prompt, p.EditCount, p.CheckCount})
.From().Where(where).Order(m => new { m.Name });
var list = query.LoadPagelt(page, rows, out records);
var resultjson = JsonConvert.SerializeObject(new { data = list, records = records});
return Content(resultjson);
}public void 三表联表分页测试()
{
var arruser = new int[2] { 1,2 }; //
string uall = "b.*", pn1 = "%蛋蛋%", pn2 = "%m%";
LockPers lpmodel = new LockPers() { IsDel = false};
Users umodel = new Users() { UserName = "jiaojiao" };
SynNote snmodel = new SynNote() { Name = "木头" };
Expression<Func<LockPers, Users, SynNote, bool>> where = PredicateBuilder.WhereStart<LockPers, Users, SynNote>();
where = where.And((l, u, s) => ( l.Name.Contains(pn1) || l.Name.Contains(pn2) ));
where = where.And((lpw, uw, sn) => lpw.IsDel == lpmodel.IsDel);
where = where.And((l, u, s) => u.UserName == umodel.UserName);
where = where.And((l, u, s) => s.Name == snmodel.Name );
where = where.And((l, u, s) => SM.In(u.Id, arruser));
DapperSqlMaker<LockPers, Users, SynNote> query = LockDapperUtilsqlite<LockPers, Users, SynNote>
.Selec()
.Column((lp, u, s) => //null) //查询所有字段
new { lp.Name, lpid = lp.Id, x = "LENGTH(a.Prompt) as len", b = SM.Sql(uall), scontent = s.Content, sname = s.Name })
.FromJoin(JoinType.Left, (lpp, uu, snn) => uu.Id == lpp.UserId
, JoinType.Inner, (lpp, uu, snn) => uu.Id == snn.UserId)
.Where(where)
.Order((lp, w, sn) => new { lp.EditCount, x = SM.OrderDesc(lp.Name), sn.Content });
var result = query.ExcuteSelect();
WriteJson(result); // 查询结果
Tuple<StringBuilder, DynamicParameters> resultsqlparams = query.RawSqlParams();
WriteSqlParams(resultsqlparams); // 打印sql和参数
int page = 2, rows = 3, records;
var result2 = query.LoadPagelt(page, rows, out records);
WriteJson(result2); // 查询结果
}生成的sql :
select a.Name as Name, a.Id as lpid
, LENGTH(a.Prompt) as len, b.*
, c.Content as scontent, c.Name as sname
from LockPers a
left join Users b on b.Id = a.UserId
inner join SynNote c on b.Id = c.UserId
where ( a.Name like @Name0 or a.Name like @Name1 )
and a.IsDel = @IsDel2 and b.UserName = @UserName3
and c.Name = @Name4 and b.Id in @Id
order by a.EditCount, a.Name desc , c.Content public void 更新部分字段测试lt()
{
var issucs = LockDapperUtilsqlite<LockPers>.Cud.Update(
s =>
{
s.Name = "测试bool修改1";
s.Content = "update方法内赋值修改字段";
s.IsDel = true;
},
w => w.Name == "测试bool修改1" && w.IsDel == true
);
Console.WriteLine(issucs);
}注意：
- svn提交到github时 不要再解决方案内复制文件 直接当作新文件添加进来
- 调试打印dapper查询sql
方法: Dapper.SqlMapper.QueryImpl
取消注释: // Console.WriteLine(cmd.CommandText);- where条件 可空类型参数 比较时 先转成值类型
- 实体表明后缀不要是数字
- 表别名按 a,b,c... 顺序类推
- 七联表以上待扩展
只需copy已实现的 修改3个文件
DapperSqlMaker
Template_DapperSqlMaker 上下文类
PredicateBuilder 条件拼接类- 实体生成T4模板使用方法点我
.NetCore版：
- DapperSqlMakerVS2017Core 文件下为 .NetCore2.0版本的待完善 表达式解析直接可以用
- SqlMapperExtensions.cs扩展类中 991-994行(#if COREFX 附近)源码编译失败 已暂时修改为return null 待解决
- 有时间把Dapper1.50.2源码和修改过的做分离开
- t4未加入
待测：
- SM这几个方法Like In Convert 值参数为 A.B.C.val VisitExpression和JoinExpression中 Like方法用