35 lines
1.3 KiB
JavaScript
35 lines
1.3 KiB
JavaScript
import inspect from '../../jsutils/inspect';
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import { GraphQLError } from '../../error/GraphQLError';
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import { getNamedType, isLeafType } from '../../type/definition';
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export function noSubselectionAllowedMessage(fieldName, type) {
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return "Field \"".concat(fieldName, "\" must not have a selection since type \"").concat(type, "\" has no subfields.");
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}
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export function requiredSubselectionMessage(fieldName, type) {
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return "Field \"".concat(fieldName, "\" of type \"").concat(type, "\" must have a selection of subfields. Did you mean \"").concat(fieldName, " { ... }\"?");
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}
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/**
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* Scalar leafs
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*
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* A GraphQL document is valid only if all leaf fields (fields without
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* sub selections) are of scalar or enum types.
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*/
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export function ScalarLeafs(context) {
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return {
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Field: function Field(node) {
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var type = context.getType();
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var selectionSet = node.selectionSet;
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if (type) {
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if (isLeafType(getNamedType(type))) {
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if (selectionSet) {
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context.reportError(new GraphQLError(noSubselectionAllowedMessage(node.name.value, inspect(type)), selectionSet));
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}
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} else if (!selectionSet) {
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context.reportError(new GraphQLError(requiredSubselectionMessage(node.name.value, inspect(type)), node));
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}
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}
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}
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};
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}
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