60 lines
2.3 KiB
JavaScript
60 lines
2.3 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* strict
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*/
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import inspect from '../../jsutils/inspect';
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import { GraphQLError } from '../../error/GraphQLError';
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import { doTypesOverlap } from '../../utilities/typeComparators';
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import { typeFromAST } from '../../utilities/typeFromAST';
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import { isCompositeType } from '../../type/definition';
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export function typeIncompatibleSpreadMessage(fragName, parentType, fragType) {
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return "Fragment \"".concat(fragName, "\" cannot be spread here as objects of ") + "type \"".concat(parentType, "\" can never be of type \"").concat(fragType, "\".");
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}
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export function typeIncompatibleAnonSpreadMessage(parentType, fragType) {
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return 'Fragment cannot be spread here as objects of ' + "type \"".concat(parentType, "\" can never be of type \"").concat(fragType, "\".");
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}
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/**
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* Possible fragment spread
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*
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* A fragment spread is only valid if the type condition could ever possibly
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* be true: if there is a non-empty intersection of the possible parent types,
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* and possible types which pass the type condition.
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*/
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export function PossibleFragmentSpreads(context) {
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return {
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InlineFragment: function InlineFragment(node) {
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var fragType = context.getType();
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var parentType = context.getParentType();
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if (isCompositeType(fragType) && isCompositeType(parentType) && !doTypesOverlap(context.getSchema(), fragType, parentType)) {
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context.reportError(new GraphQLError(typeIncompatibleAnonSpreadMessage(inspect(parentType), inspect(fragType)), [node]));
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}
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},
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FragmentSpread: function FragmentSpread(node) {
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var fragName = node.name.value;
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var fragType = getFragmentType(context, fragName);
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var parentType = context.getParentType();
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if (fragType && parentType && !doTypesOverlap(context.getSchema(), fragType, parentType)) {
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context.reportError(new GraphQLError(typeIncompatibleSpreadMessage(fragName, inspect(parentType), inspect(fragType)), [node]));
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}
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}
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};
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}
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function getFragmentType(context, name) {
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var frag = context.getFragment(name);
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if (frag) {
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var type = typeFromAST(context.getSchema(), frag.typeCondition);
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if (isCompositeType(type)) {
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return type;
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}
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}
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} |