forked from STI/Astroport.ONE
41 lines
1.3 KiB
Python
41 lines
1.3 KiB
Python
from typing import Any, Dict
|
|
|
|
from ...error import GraphQLError
|
|
from ...language import NameNode, FragmentDefinitionNode, VisitorAction, SKIP
|
|
from . import ASTValidationContext, ASTValidationRule
|
|
|
|
__all__ = ["UniqueFragmentNamesRule"]
|
|
|
|
|
|
class UniqueFragmentNamesRule(ASTValidationRule):
|
|
"""Unique fragment names
|
|
|
|
A GraphQL document is only valid if all defined fragments have unique names.
|
|
|
|
See https://spec.graphql.org/draft/#sec-Fragment-Name-Uniqueness
|
|
"""
|
|
|
|
def __init__(self, context: ASTValidationContext):
|
|
super().__init__(context)
|
|
self.known_fragment_names: Dict[str, NameNode] = {}
|
|
|
|
@staticmethod
|
|
def enter_operation_definition(*_args: Any) -> VisitorAction:
|
|
return SKIP
|
|
|
|
def enter_fragment_definition(
|
|
self, node: FragmentDefinitionNode, *_args: Any
|
|
) -> VisitorAction:
|
|
known_fragment_names = self.known_fragment_names
|
|
fragment_name = node.name.value
|
|
if fragment_name in known_fragment_names:
|
|
self.report_error(
|
|
GraphQLError(
|
|
f"There can be only one fragment named '{fragment_name}'.",
|
|
[known_fragment_names[fragment_name], node.name],
|
|
)
|
|
)
|
|
else:
|
|
known_fragment_names[fragment_name] = node.name
|
|
return SKIP
|