Schema Validation in MongoDB
From the MongoDB cheat sheet · Schema Design & Validation · verified Jul 2026
Schema Validation
Enforce document structure and data types
javascript
// Create collection with validation
db.createCollection("users", {
validator: {
$jsonSchema: {
bsonType: "object",
required: ["name", "email", "age"],
properties: {
name: {
bsonType: "string",
description: "must be a string"
},
email: {
bsonType: "string",
pattern: "^[a-z0-9+_.-]+@[a-z0-9.-]+$"
},
age: {
bsonType: "int",
minimum: 18,
maximum: 120
}
}
}
}
})🟢 Essential - Ensure data integrity
💡 JSON Schema provides rich validation
📌 validationLevel controls when to validate
⚠️ Validation adds small performance overhead
🔗 Related: Mongoose for application-level validation
schemavalidation