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How to trim spaces from field in MongoDB query?
To trim spaces from field, use $trim in MongoDB. Let us create a collection with documents −
> db.demo217.insertOne({"FullName":" Chris Brown"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e3e5d1e03d395bdc213470f")
}
> db.demo217.insertOne({"FullName":" David Miller"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e3e5d2503d395bdc2134710")
}
> db.demo217.insertOne({"FullName":" John Doe"});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e3e5d2b03d395bdc2134711")
}Display all documents from a collection with the help of find() method −
> db.demo217.find();
This will produce the following output −
{ "_id" : ObjectId("5e3e5d1e03d395bdc213470f"), "FullName" : " Chris Brown" }
{ "_id" : ObjectId("5e3e5d2503d395bdc2134710"), "FullName" : " David Miller" }
{ "_id" : ObjectId("5e3e5d2b03d395bdc2134711"), "FullName" : " John Doe" }Following is the query to trim spaces from field in MongoDB −
> db.demo217.aggregate([
... { $project: { Name: { $trim: { input: "$FullName" } } } }
... ])This will produce the following output −
{ "_id" : ObjectId("5e3e5d1e03d395bdc213470f"), "Name" : "Chris Brown" }
{ "_id" : ObjectId("5e3e5d2503d395bdc2134710"), "Name" : "David Miller" }
{ "_id" : ObjectId("5e3e5d2b03d395bdc2134711"), "Name" : "John Doe" }
Updated on: 30-Mar-2020
1K+ Views
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