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Legal StudiesMongoDB：查找与正则表达式输入类似的名称？
在 MongoDB 中使用 $regex 发送名称以查找与输入类似的名称。让我们创建一个包含文档的集合 -
> db.demo514.insertOne({"Information":{"FullName":"John Doe"}});{
"acknowledged" : true,
"insertedId" : ObjectId("5e885116987b6e0e9d18f58c")
}
> db.demo514.insertOne({"Information":{"FullName":"John Smith"}});{
"acknowledged" : true,
"insertedId" : ObjectId("5e88515e987b6e0e9d18f58d")
}
> db.demo514.insertOne({"Information":{"FullName":"john doe"}});{
"acknowledged" : true,
"insertedId" : ObjectId("5e885169987b6e0e9d18f58e")
}
> db.demo514.insertOne({"Information":{"FullName":"Chris Brown"}});{
"acknowledged" : true,
"insertedId" : ObjectId("5e88516f987b6e0e9d18f58f")
}使用 find() 方法从集合中显示所有文档 -
> db.demo514.find();
这将产生以下输出 -
{ "_id" : ObjectId("5e885116987b6e0e9d18f58c"), "Information" : { "FullName" : "John Doe" } }
{ "_id" : ObjectId("5e88515e987b6e0e9d18f58d"), "Information" : { "FullName" : "John Smith" } }
{ "_id" : ObjectId("5e885169987b6e0e9d18f58e"), "Information" : { "FullName" : "john doe" } }
{ "_id" : ObjectId("5e88516f987b6e0e9d18f58f"), "Information" : { "FullName" : "Chris Brown" } }以下是查找与输入类似名称的查询 -
> db.demo514.find({'Information.FullName': {$regex: "John Doe", $options: 'i'}});这将产生以下输出 -
{ "_id" : ObjectId("5e885116987b6e0e9d18f58c"), "Information" : { "FullName" : "John Doe" } }
{ "_id" : ObjectId("5e885169987b6e0e9d18f58e"), "Information" : { "FullName" : "john doe" } }
更新于：13-May-2020
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