在MongoDB中构建（转义）正则表达式？
为此，请find()与//i一起使用。让我们创建一个包含文档的集合-
> db.demo696.insertOne({Message:"/Good/"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea6d664551299a9f98c9391")
}
> db.demo696.insertOne({Message:"(good)"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea6d67a551299a9f98c9392")
}
> db.demo696.insertOne({Message:"/Bye/"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea6d68b551299a9f98c9393")
}
> db.demo696.insertOne({Message:"(GOOD)"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5ea6d693551299a9f98c9394")
}在find()方法的帮助下显示集合中的所有文档-
> db.demo696.find();
这将产生以下输出-
{ "_id" : ObjectId("5ea6d664551299a9f98c9391"), "Message" : "/Good/" }
{ "_id" : ObjectId("5ea6d67a551299a9f98c9392"), "Message" : "(good)" }
{ "_id" : ObjectId("5ea6d68b551299a9f98c9393"), "Message" : "/Bye/" }
{ "_id" : ObjectId("5ea6d693551299a9f98c9394"), "Message" : "(GOOD)" }以下是转义regexp的查询-
> db.demo696.find({Message:/good/i});这将产生以下输出-
{ "_id" : ObjectId("5ea6d664551299a9f98c9391"), "Message" : "/Good/" }
{ "_id" : ObjectId("5ea6d67a551299a9f98c9392"), "Message" : "(good)" }
{ "_id" : ObjectId("5ea6d693551299a9f98c9394"), "Message" : "(GOOD)" }