You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
80 lines
3.3 KiB
80 lines
3.3 KiB
|
|
using SqlSugar;
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Text;
|
|
using System.Threading.Tasks;
|
|
|
|
namespace OrmTest
|
|
{
|
|
public class UCustom012
|
|
{
|
|
|
|
public static void Init()
|
|
{
|
|
var db = NewUnitTest.Db;
|
|
|
|
db.CodeFirst.InitTables<StudentA, RoomA, SchoolA>();
|
|
db.DbMaintenance.TruncateTable<StudentA>();
|
|
db.DbMaintenance.TruncateTable<RoomA>();
|
|
db.DbMaintenance.TruncateTable<SchoolA>();
|
|
|
|
db.Insertable(new RoomA() { RoomId = 1, RoomName = "北大001室", SchoolId = 1 }).ExecuteCommand();
|
|
db.Insertable(new RoomA() { RoomId = 2, RoomName = "北大002室", SchoolId = 1 }).ExecuteCommand();
|
|
db.Insertable(new RoomA() { RoomId = 3, RoomName = "北大003室", SchoolId = 1 }).ExecuteCommand();
|
|
db.Insertable(new RoomA() { RoomId = 4, RoomName = "清华001厅", SchoolId = 2 }).ExecuteCommand();
|
|
db.Insertable(new RoomA() { RoomId = 5, RoomName = "清华002厅", SchoolId = 2 }).ExecuteCommand();
|
|
db.Insertable(new RoomA() { RoomId = 6, RoomName = "清华003厅", SchoolId = 2 }).ExecuteCommand();
|
|
|
|
|
|
db.Insertable(new SchoolA() { SchoolId = 1, SchoolName = "北大" }).ExecuteCommand();
|
|
db.Insertable(new SchoolA() { SchoolId = 2, SchoolName = "清华" }).ExecuteCommand();
|
|
|
|
db.Insertable(new StudentA() { StudentId = 1, SchoolId = 1, Name = "北大jack" }).ExecuteCommand();
|
|
db.Insertable(new StudentA() { StudentId = 2, SchoolId = 1, Name = "北大tom" }).ExecuteCommand();
|
|
db.Insertable(new StudentA() { StudentId = 3, SchoolId = 2, Name = "清华jack" }).ExecuteCommand();
|
|
db.Insertable(new StudentA() { StudentId = 4, SchoolId = 2, Name = "清华tom" }).ExecuteCommand();
|
|
|
|
//先用Mapper导航映射查出第二层
|
|
var list = db.Queryable<StudentA>().Mapper(x => x.SchoolA, x => x.SchoolId).ToList();
|
|
|
|
//参数1 ：将第二层对象合并成一个集合 参数2：委托
|
|
//说明：如果2级对象是集合用SelectMany
|
|
db.ThenMapper(list.Select(it => it.SchoolA), sch =>
|
|
{
|
|
//参数1: room表关联字段 参数2: school表关联字段， 参数3: school当前记录
|
|
sch.RoomList = db.Queryable<RoomA>().SetContext(room => room.SchoolId, () => sch.SchoolId, sch).ToList();
|
|
});
|
|
|
|
|
|
}
|
|
public class StudentA
|
|
{
|
|
[SugarColumn(IsPrimaryKey = true)]
|
|
public int StudentId { get; set; }
|
|
public string Name { get; set; }
|
|
public int SchoolId { get; set; }
|
|
[SugarColumn(IsIgnore = true)]
|
|
public SchoolA SchoolA { get; set; }
|
|
}
|
|
|
|
public class SchoolA
|
|
{
|
|
[SugarColumn(IsPrimaryKey = true)]
|
|
public int SchoolId { get; set; }
|
|
public string SchoolName { get; set; }
|
|
[SugarColumn(IsIgnore = true)]
|
|
public List<RoomA> RoomList { get; set; }
|
|
}
|
|
|
|
public class RoomA
|
|
{
|
|
[SugarColumn(IsPrimaryKey = true)]
|
|
public int RoomId { get; set; }
|
|
public string RoomName { get; set; }
|
|
public int SchoolId { get; set; }
|
|
}
|
|
|
|
}
|
|
}
|
|
|