执行MongoDB全文搜索
要在MongoDB中进行全文搜索，请使用$text。$text对字段的内容执行文本搜索。让我们创建一个包含文档的集合-
> db.demo654.createIndex({Name:"text"});
{
"createdCollectionAutomatically" : true,
"numIndexesBefore" : 1,
"numIndexesAfter" : 2,
"ok" : 1
}
> db.demo654.insertOne({"Name":"John Doe"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea04e924deddd72997713c8")
}
> db.demo654.insertOne({"Name":"Chris Brown"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea04e9d4deddd72997713c9")
}
> db.demo654.insertOne({"Name":"John Smith"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea04ea54deddd72997713ca")
}
> db.demo654.insertOne({"Name":"David Miller"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea04eb24deddd72997713cb")
}在find()方法的帮助下显示集合中的所有文档-
> db.demo654.find();
这将产生以下输出-
{ "_id" : ObjectId("5ea04e924deddd72997713c8"), "Name" : "John Doe" }
{ "_id" : ObjectId("5ea04e9d4deddd72997713c9"), "Name" : "Chris Brown" }
{ "_id" : ObjectId("5ea04ea54deddd72997713ca"), "Name" : "John Smith" }
{ "_id" : ObjectId("5ea04eb24deddd72997713cb"), "Name" : "David Miller" }以下是在MongoDB中执行全文本搜索的查询-
> db.demo654.find({ $text: { $search: "John" } } );这将产生以下输出-
{ "_id" : ObjectId("5ea04ea54deddd72997713ca"), "Name" : "John Smith" }
{ "_id" : ObjectId("5ea04e924deddd72997713c8"), "Name" : "John Doe" }