graphql
Version:
A Query Language and Runtime which can target any service.
42 lines (40 loc) • 1.52 kB
JavaScript
/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* strict
*/
import inspect from '../../jsutils/inspect';
import { GraphQLError } from '../../error/GraphQLError';
import { getNamedType, isLeafType } from '../../type/definition';
export function noSubselectionAllowedMessage(fieldName, type) {
return "Field \"".concat(fieldName, "\" must not have a selection since ") + "type \"".concat(type, "\" has no subfields.");
}
export function requiredSubselectionMessage(fieldName, type) {
return "Field \"".concat(fieldName, "\" of type \"").concat(type, "\" must have a ") + "selection of subfields. Did you mean \"".concat(fieldName, " { ... }\"?");
}
/**
* Scalar leafs
*
* A GraphQL document is valid only if all leaf fields (fields without
* sub selections) are of scalar or enum types.
*/
export function ScalarLeafs(context) {
return {
Field: function Field(node) {
var type = context.getType();
var selectionSet = node.selectionSet;
if (type) {
if (isLeafType(getNamedType(type))) {
if (selectionSet) {
context.reportError(new GraphQLError(noSubselectionAllowedMessage(node.name.value, inspect(type)), [selectionSet]));
}
} else if (!selectionSet) {
context.reportError(new GraphQLError(requiredSubselectionMessage(node.name.value, inspect(type)), [node]));
}
}
}
};
}