forked from STI/Astroport.ONE
49 lines
1.7 KiB
Python
49 lines
1.7 KiB
Python
from typing import Any, Dict
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from ...error import GraphQLError
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from ...language import NameNode, TypeDefinitionNode, VisitorAction, SKIP
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from . import SDLValidationContext, SDLValidationRule
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__all__ = ["UniqueTypeNamesRule"]
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class UniqueTypeNamesRule(SDLValidationRule):
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"""Unique type names
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A GraphQL document is only valid if all defined types have unique names.
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"""
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def __init__(self, context: SDLValidationContext):
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super().__init__(context)
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self.known_type_names: Dict[str, NameNode] = {}
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self.schema = context.schema
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def check_type_name(self, node: TypeDefinitionNode, *_args: Any) -> VisitorAction:
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type_name = node.name.value
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if self.schema and self.schema.get_type(type_name):
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self.report_error(
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GraphQLError(
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f"Type '{type_name}' already exists in the schema."
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" It cannot also be defined in this type definition.",
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node.name,
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)
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)
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else:
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if type_name in self.known_type_names:
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self.report_error(
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GraphQLError(
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f"There can be only one type named '{type_name}'.",
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[self.known_type_names[type_name], node.name],
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)
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)
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else:
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self.known_type_names[type_name] = node.name
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return SKIP
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return None
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enter_scalar_type_definition = enter_object_type_definition = check_type_name
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enter_interface_type_definition = enter_union_type_definition = check_type_name
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enter_enum_type_definition = enter_input_object_type_definition = check_type_name
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