通过MongoDB实现分页？
您可以在limit()和的帮助下实现分页skip()。
为了理解这个概念，让我们用文档创建一个集合。使用文档创建集合的查询如下-
> db.paginationDemo.insertOne({"CustomerName":"Chris","CustomerAge":23});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c949de44cf1f7a64fa4df52")
}
> db.paginationDemo.insertOne({"CustomerName":"Robert","CustomerAge":26});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c949df14cf1f7a64fa4df53")
}
> db.paginationDemo.insertOne({"CustomerName":"David","CustomerAge":24});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c949dfc4cf1f7a64fa4df54")
}
> db.paginationDemo.insertOne({"CustomerName":"Carol","CustomerAge":28});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c949e3e4cf1f7a64fa4df55")
}
> db.paginationDemo.insertOne({"CustomerName":"Bob","CustomerAge":29});
{
"acknowledged" : true,
"insertedId" : ObjectId("5c949e474cf1f7a64fa4df56")
}在find()method的帮助下显示集合中的所有文档。查询如下-
> db.paginationDemo.find().pretty();
以下是输出-
{
"_id" : ObjectId("5c949de44cf1f7a64fa4df52"),
"CustomerName" : "Chris",
"CustomerAge" : 23
}
{
"_id" : ObjectId("5c949df14cf1f7a64fa4df53"),
"CustomerName" : "Robert",
"CustomerAge" : 26
}
{
"_id" : ObjectId("5c949dfc4cf1f7a64fa4df54"),
"CustomerName" : "David",
"CustomerAge" : 24
}
{
"_id" : ObjectId("5c949e3e4cf1f7a64fa4df55"),
"CustomerName" : "Carol",
"CustomerAge" : 28
}
{
"_id" : ObjectId("5c949e474cf1f7a64fa4df56"),
"CustomerName" : "Bob",
"CustomerAge" : 29
}这是与MongoDB分页的查询-
> db.paginationDemo.find().skip(0).limit(3);
以下是输出-
{ "_id" : ObjectId("5c949de44cf1f7a64fa4df52"), "CustomerName" : "Chris", "CustomerAge" : 23 }
{ "_id" : ObjectId("5c949df14cf1f7a64fa4df53"), "CustomerName" : "Robert", "CustomerAge" : 26 }
{ "_id" : ObjectId("5c949dfc4cf1f7a64fa4df54"), "CustomerName" : "David", "CustomerAge" : 24 }