Articles → MONGODB → Validations In MongoDB

Validations In MongoDB

In this article, we will discuss validations in MongoDB.

Purpose

Validations mean enforcing the rules on the data stored in the collection.

Scenario

Consider a scenario where we have a users collection. Inside the collection, we have 2 fields i.e., name and age. The rules that we want to enforce are: -

Name should be mandatory
Age should be non-negative

Creating A Collection With Validation

For creating the collection, we will use the following command: -

db.createCollection("users", {
  validator: {
    $jsonSchema: {
      bsonType: "object",
      required: ["name", "age"],
      properties: {
        name: {
          bsonType: "string",
          description: "must be a string and is required"
        },
        age: {
          bsonType: "int",
          minimum: 0,
          description: "must be a positive integer and is required"
        }
      }
    }
  }
})

Inserting Data

First, insert non-valid data in the collection.

Picture showing inserting the invalid data in the users table

Click to Enlarge

Insert the valid data in the collection.

Picture showing inserting the valid data in the users table

Click to Enlarge

Posted By -	Karan Gupta

Posted On -	Friday, July 28, 2023

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