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- import inspect from '../../jsutils/inspect';
- import { GraphQLError } from '../../error/GraphQLError';
- import { type FieldNode } from '../../language/ast';
- import { type ASTVisitor } from '../../language/visitor';
- import { getNamedType, isLeafType } from '../../type/definition';
- import { type ValidationContext } from '../ValidationContext';
- export function noSubselectionAllowedMessage(
- fieldName: string,
- type: string,
- ): string {
- return `Field "${fieldName}" must not have a selection since type "${type}" has no subfields.`;
- }
- export function requiredSubselectionMessage(
- fieldName: string,
- type: string,
- ): string {
- return `Field "${fieldName}" of type "${type}" must have a selection of subfields. Did you mean "${fieldName} { ... }"?`;
- }
- export function ScalarLeafs(context: ValidationContext): ASTVisitor {
- return {
- Field(node: FieldNode) {
- const type = context.getType();
- const selectionSet = node.selectionSet;
- if (type) {
- if (isLeafType(getNamedType(type))) {
- if (selectionSet) {
- context.reportError(
- new GraphQLError(
- noSubselectionAllowedMessage(node.name.value, inspect(type)),
- selectionSet,
- ),
- );
- }
- } else if (!selectionSet) {
- context.reportError(
- new GraphQLError(
- requiredSubselectionMessage(node.name.value, inspect(type)),
- node,
- ),
- );
- }
- }
- },
- };
- }
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