graphql/validation/rules/UniqueFieldDefinitionNamesRule.mjs.map

A Query Language and Runtime which can target any service.

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[];\n\n    for (const fieldDef of fieldNodes) {\n      const fieldName = fieldDef.name.value;\n\n      if (hasField(existingTypeMap[typeName], fieldName)) {\n        context.reportError(\n          new GraphQLError(\n            `Field \"${typeName}.${fieldName}\" already exists in the schema. It cannot also be defined in this type extension.`,\n            { nodes: fieldDef.name },\n          ),\n        );\n        continue;\n      }\n\n      const knownFieldName = fieldNames.get(fieldName);\n      if (knownFieldName != null) {\n        context.reportError(\n          new GraphQLError(\n            `Field \"${typeName}.${fieldName}\" can only be defined once.`,\n            { nodes: [knownFieldName, fieldDef.name] },\n          ),\n        );\n      } else {\n        fieldNames.set(fieldName, fieldDef.name);\n      }\n    }\n\n    return false;\n  }\n}\n\nfunction hasField(type: GraphQLNamedType, fieldName: string): boolean {\n  if (isObjectType(type) || isInterfaceType(type) || isInputObjectType(type)) {\n    return type.getFields()[fieldName] != null;\n  }\n  return false;\n}\n"]}