Скачать или смотреть mongoose schema validation not working

Mongoose methods do not run validators by default for:

1. updateOne()
2. updateMany()
3. findOneAndUpdate()
4. findByIdAndUpdate()

Because, by default, Mongoose's direct update these methods by bypass schema validation for performance reasons.

These methods send the update command directly to the MongoDB database without first retrieving the document and running it through your schema. This makes the operation much faster and more efficient, as it avoids the extra step of fetching the document.

For better understanding, When you use .save(), Mongoose first fetches the entire document into memory, applies your changes, runs all validators on the complete document, and then saves it back. This is slow but safe.

But, When you use these(i.e. updateOne ...), Mongoose sends the update command directly to the database. It's an atomic operation that just changes the specified fields. This is fast but bypasses validation.

To force Mongoose to run your schema validators during an update, you must explicitly add the { runValidators: true } option to your query.

------ Except for these 4 methods, you don't have to explicitly add { runValidators: true } since Mongoose always checks schema before storing the data