标签：obj 字段 顺序 结果 tle find lis EDA sql
mongodb中的全部数据：
db.testInfo.find({})
.sort({_id:-1})
.limit(100)
查询结果：
/* 1 createdAt:2019/10/11 下午5:12:50*/
{
"_id" : ObjectId("5da04792665cd81dc0d46d3d"),
"name" : "jim2",
"age" : 5,
"list" : [
{
"title" : "a2",
"price" : 1
},
{
"title" : "a1",
"price" : 5
}
]
},
/* 2 createdAt:2019/10/11 下午5:01:55*/
{
"_id" : ObjectId("5da04503665cd81dc0d46d3c"),
"name" : "leo",
"age" : 4,
"list" : [
{
"title" : "a1",
"price" : 3
},
{
"title" : "d2",
"price" : 2
}
]
},
/* 3 createdAt:2019/10/11 下午5:01:55*/
{
"_id" : ObjectId("5da04503665cd81dc0d46d3b"),
"name" : "jason",
"age" : 3,
"list" : [
{
"title" : "a1",
"price" : 2
},
{
"title" : "c2",
"price" : 1
}
]
},
/* 4 createdAt:2019/10/11 下午5:01:55*/
{
"_id" : ObjectId("5da04503665cd81dc0d46d3a"),
"name" : "mark",
"age" : 2,
"list" : [
{
"title" : "a1",
"price" : 3
},
{
"title" : "b2",
"price" : 4
}
]
},
/* 5 createdAt:2019/10/11 下午5:00:12*/
{
"_id" : ObjectId("5da0449c665cd81dc0d46d39"),
"name" : "jim",
"age" : 1,
"list" : [
{
"title" : "a1",
"price" : 1
},
{
"title" : "a2",
"price" : 2
}
]
}
通过嵌入文档中查询指定title的数据，然后根据price排序，注意需要排序时将查询的title也一并作为排序字段，否则顺序会错乱。
db.testInfo.find({"list.title":"a1"})
.sort({
"list.title":1,
"list.price":1
});
查询结果：
/* 1 createdAt:2019/10/11 下午5:00:12*/
{
"_id" : ObjectId("5da0449c665cd81dc0d46d39"),
"name" : "jim",
"age" : 1,
"list" : [
{
"title" : "a1",
"price" : 1
},
{
"title" : "a2",
"price" : 2
}
]
},
/* 2 createdAt:2019/10/11 下午5:01:55*/
{
"_id" : ObjectId("5da04503665cd81dc0d46d3b"),
"name" : "jason",
"age" : 3,
"list" : [
{
"title" : "a1",
"price" : 2
},
{
"title" : "c2",
"price" : 1
}
]
},
/* 3 createdAt:2019/10/11 下午5:01:55*/
{
"_id" : ObjectId("5da04503665cd81dc0d46d3a"),
"name" : "mark",
"age" : 2,
"list" : [
{
"title" : "a1",
"price" : 3
},
{
"title" : "b2",
"price" : 4
}
]
},
/* 4 createdAt:2019/10/11 下午5:01:55*/
{
"_id" : ObjectId("5da04503665cd81dc0d46d3c"),
"name" : "leo",
"age" : 4,
"list" : [
{
"title" : "a1",
"price" : 3
},
{
"title" : "d2",
"price" : 2
}
]
},
/* 5 createdAt:2019/10/11 下午5:12:50*/
{
"_id" : ObjectId("5da04792665cd81dc0d46d3d"),
"name" : "jim2",
"age" : 5,
"list" : [
{
"title" : "a2",
"price" : 1
},
{
"title" : "a1",
"price" : 5
}
]
}
标签：obj 字段 顺序 结果 tle find lis EDA sql
原文地址：https://www.cnblogs.com/yangyuping/p/11655752.html
