What is a MongoDB document schema?

document schema defines the structure, rules, and validations for documents in a

collection. MongoDB is schema-less by default, but you can enforce schema validation rules

using MongoDB schema validation.

Example:

db.createCollection("users", {

validator: {

$jsonSchema: {

bsonType: "object",

required: ["name", "email"],

properties: {

name: { bsonType: "string" },

email: { bsonType: "string" }

}
}
}

});