96 lines
2.6 KiB
JavaScript
96 lines
2.6 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, '__esModule', {
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value: true,
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});
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exports.PossibleFragmentSpreadsRule = PossibleFragmentSpreadsRule;
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var _inspect = require('../../jsutils/inspect.js');
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var _GraphQLError = require('../../error/GraphQLError.js');
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var _definition = require('../../type/definition.js');
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var _typeComparators = require('../../utilities/typeComparators.js');
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var _typeFromAST = require('../../utilities/typeFromAST.js');
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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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function PossibleFragmentSpreadsRule(context) {
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return {
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InlineFragment(node) {
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const fragType = context.getType();
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const parentType = context.getParentType();
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if (
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(0, _definition.isCompositeType)(fragType) &&
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(0, _definition.isCompositeType)(parentType) &&
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!(0, _typeComparators.doTypesOverlap)(
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context.getSchema(),
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fragType,
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parentType,
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)
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) {
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const parentTypeStr = (0, _inspect.inspect)(parentType);
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const fragTypeStr = (0, _inspect.inspect)(fragType);
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context.reportError(
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new _GraphQLError.GraphQLError(
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`Fragment cannot be spread here as objects of type "${parentTypeStr}" can never be of type "${fragTypeStr}".`,
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{
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nodes: 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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FragmentSpread(node) {
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const fragName = node.name.value;
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const fragType = getFragmentType(context, fragName);
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const parentType = context.getParentType();
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if (
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fragType &&
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parentType &&
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!(0, _typeComparators.doTypesOverlap)(
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context.getSchema(),
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fragType,
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parentType,
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)
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) {
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const parentTypeStr = (0, _inspect.inspect)(parentType);
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const fragTypeStr = (0, _inspect.inspect)(fragType);
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context.reportError(
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new _GraphQLError.GraphQLError(
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`Fragment "${fragName}" cannot be spread here as objects of type "${parentTypeStr}" can never be of type "${fragTypeStr}".`,
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{
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nodes: 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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};
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}
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function getFragmentType(context, name) {
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const frag = context.getFragment(name);
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if (frag) {
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const type = (0, _typeFromAST.typeFromAST)(
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context.getSchema(),
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frag.typeCondition,
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);
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if ((0, _definition.isCompositeType)(type)) {
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return type;
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}
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}
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}
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