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Contents
import { GraphQLError } from '../../error/GraphQLError.mjs';
import { print } from '../../language/printer.mjs';
import { isCompositeType } from '../../type/definition.mjs';
import { typeFromAST } from '../../utilities/typeFromAST.mjs';
/**
* Fragments on composite type
*
* Fragments use a type condition to determine if they apply, since fragments
* can only be spread into a composite type (object, interface, or union), the
* type condition must also be a composite type.
*
* See https://spec.graphql.org/draft/#sec-Fragments-On-Composite-Types
*/
export function FragmentsOnCompositeTypesRule(context) {
return {
InlineFragment(node) {
const typeCondition = node.typeCondition;
if (typeCondition) {
const type = typeFromAST(context.getSchema(), typeCondition);
if (type && !isCompositeType(type)) {
const typeStr = print(typeCondition);
context.reportError(
new GraphQLError(
`Fragment cannot condition on non composite type "${typeStr}".`,
{
nodes: typeCondition,
},
),
);
}
}
},
FragmentDefinition(node) {
const type = typeFromAST(context.getSchema(), node.typeCondition);
if (type && !isCompositeType(type)) {
const typeStr = print(node.typeCondition);
context.reportError(
new GraphQLError(
`Fragment "${node.name.value}" cannot condition on non composite type "${typeStr}".`,
{
nodes: node.typeCondition,
},
),
);
}
},
};
}
Version data entries
26 entries across 26 versions & 1 rubygems