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64 lines
2.4 KiB
64 lines
2.4 KiB
"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 = _interopRequireDefault(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 _typeFromAST = require("../../utilities/typeFromAST.js");
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var _typeComparators = require("../../utilities/typeComparators.js");
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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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: function InlineFragment(node) {
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var fragType = context.getType();
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var parentType = context.getParentType();
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if ((0, _definition.isCompositeType)(fragType) && (0, _definition.isCompositeType)(parentType) && !(0, _typeComparators.doTypesOverlap)(context.getSchema(), fragType, parentType)) {
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var parentTypeStr = (0, _inspect.default)(parentType);
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var fragTypeStr = (0, _inspect.default)(fragType);
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context.reportError(new _GraphQLError.GraphQLError("Fragment cannot be spread here as objects of type \"".concat(parentTypeStr, "\" can never be of type \"").concat(fragTypeStr, "\"."), 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 && !(0, _typeComparators.doTypesOverlap)(context.getSchema(), fragType, parentType)) {
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var parentTypeStr = (0, _inspect.default)(parentType);
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var fragTypeStr = (0, _inspect.default)(fragType);
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context.reportError(new _GraphQLError.GraphQLError("Fragment \"".concat(fragName, "\" cannot be spread here as objects of type \"").concat(parentTypeStr, "\" can never be of type \"").concat(fragTypeStr, "\"."), 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 = (0, _typeFromAST.typeFromAST)(context.getSchema(), frag.typeCondition);
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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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