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31 lines
831 B
JavaScript
31 lines
831 B
JavaScript
import { GraphQLError } from "../../error/GraphQLError.mjs";
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/**
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* Unique argument names
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*
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* A GraphQL field or directive is only valid if all supplied arguments are
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* uniquely named.
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*/
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export function UniqueArgumentNamesRule(context) {
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var knownArgNames = Object.create(null);
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return {
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Field: function Field() {
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knownArgNames = Object.create(null);
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},
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Directive: function Directive() {
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knownArgNames = Object.create(null);
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},
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Argument: function Argument(node) {
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var argName = node.name.value;
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if (knownArgNames[argName]) {
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context.reportError(new GraphQLError("There can be only one argument named \"".concat(argName, "\"."), [knownArgNames[argName], node.name]));
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} else {
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knownArgNames[argName] = node.name;
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}
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return false;
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}
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};
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}
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