How to insert a boolean field in MongoDB?

To insert a boolean field in MongoDB, use the true or false keywords directly in your document. MongoDB natively supports boolean data types, making it simple to store yes/no, on/off, or enabled/disabled states.

Syntax

db.collection.insertOne({
    "fieldName": true,
    "anotherField": false
});

Sample Data

Let us create a collection with employee documents containing boolean fields −

db.demo215.insertMany([
    {"EmployeeDetails": [{"EmployeeName": "David", "isMarried": false, "Salary": 56000}]},
    {"EmployeeDetails": [{"EmployeeName": "Bob", "isMarried": true, "Salary": 60000}]},
    {"EmployeeDetails": [{"EmployeeName": "Chris", "isMarried": false, "Salary": 78000}]},
    {"EmployeeDetails": [{"EmployeeName": "Mike", "isMarried": true, "Salary": 17000}]}
]);

{
    "acknowledged": true,
    "insertedIds": [
        ObjectId("5e3e344003d395bdc2134708"),
        ObjectId("5e3e344d03d395bdc2134709"),
        ObjectId("5e3e345a03d395bdc213470a"),
        ObjectId("5e3e346f03d395bdc213470b")
    ]
}

Verify the Data

Display all documents from the collection with the find() method −

db.demo215.find();

{"_id": ObjectId("5e3e344003d395bdc2134708"), "EmployeeDetails": [{"EmployeeName": "David", "isMarried": false, "Salary": 56000}]}
{"_id": ObjectId("5e3e344d03d395bdc2134709"), "EmployeeDetails": [{"EmployeeName": "Bob", "isMarried": true, "Salary": 60000}]}
{"_id": ObjectId("5e3e345a03d395bdc213470a"), "EmployeeDetails": [{"EmployeeName": "Chris", "isMarried": false, "Salary": 78000}]}
{"_id": ObjectId("5e3e346f03d395bdc213470b"), "EmployeeDetails": [{"EmployeeName": "Mike", "isMarried": true, "Salary": 17000}]}

Key Points

• Use true and false keywords without quotes for boolean values.
• Boolean fields are useful for flags, status indicators, and conditional logic.
• You can query boolean fields directly: {"isMarried": true}

Conclusion

MongoDB natively supports boolean data types using true and false keywords. Simply include these values in your documents without quotes to create boolean fields for storing binary state information.