@validate

Use the @validate directive to validate the content of a field.

You can use all "baked-in validations" specified in this library.

Scope of Validation Statements

The only restriction for this directive is that you cannot perform validations based on other fields.

Example

We want to check if the email is a valid email address and if it is lowercase. This is the first option to achieve this:

user.graphql

type User @upsertOn(...) {
    email: String! @validate(tags: ["email"]) @validate(tags: ["lowercase"])
}

As you can see, the @validate directive can be used multiple times to specify multiple validations.

Another option is to use the tags parameter to specify multiple validations:

user.graphql

type User @upsertOn(...) {
    email: String! @validate(tags: ["email", "lowercase"])
}

Both examples will validate the email field with the email and lowercase tags.