AddValidationRules

This extension allows you add custom validation rules.

See graphql.validation.rules.custom for some custom rules that can be added from GraphQl-core.

Usage example:

import strawberry
from strawberry.extensions import AddValidationRules
from graphql import ValidationRule
class MyCustomRule(ValidationRule):
...
schema = strawberry.Schema(
Query,
extensions=[
AddValidationRules(MyCustomRule),
]
)

API reference:

class AddValidationRules(validation_rules)

validation_rules: List[Type[ASTValidationRule]]

List of GraphQL validation rules.

More examples:

Adding a custom rule
import strawberry
from strawberry.extensions import AddValidationRules
from graphql import ValidationRule
class CustomRule(ValidationRule):
def enter_field(self, node, *args) -> None:
if node.name.value == "example":
self.report_error(GraphQLError("Can't query field 'example'"))
schema = strawberry.Schema(
Query,
extensions=[
AddValidationRules([CustomRule]),
]
)
result = schema.execute_sync("{ example }")
assert str(result.errors[0]) == "Can't query field 'example'"
Adding the `NoDeprecatedCustomRule` from GraphQL-core
import strawberry
from strawberry.extensions import AddValidationRules
from graphql.validation import NoDeprecatedCustomRule
schema = strawberry.Schema(
Query,
extensions=[
AddValidationRules([NoDeprecatedCustomRule]),
]
)
Adding the `NoSchemaIntrospectionCustomRule` from GraphQL-core
import strawberry
from strawberry.extensions import AddValidationRules
from graphql.validation import NoSchemaIntrospectionCustomRule
schema = strawberry.Schema(
Query,
extensions=[
AddValidationRules([NoSchemaIntrospectionCustomRule]),
]
)

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