@graphql-tools/graphql/esm/validation/rules/VariablesAreInputTypesRule.js

Fork of GraphQL.js

import { GraphQLError } from '../../error/GraphQLError.js';
import { print } from '../../language/printer.js';
import { isInputType } from '../../type/definition.js';
import { typeFromAST } from '../../utilities/typeFromAST.js';
/**
 * Variables are input types
 *
 * A GraphQL operation is only valid if all the variables it defines are of
 * input types (scalar, enum, or input object).
 *
 * See https://spec.graphql.org/draft/#sec-Variables-Are-Input-Types
 */
export function VariablesAreInputTypesRule(context) {
    return {
        VariableDefinition(node) {
            const type = typeFromAST(context.getSchema(), node.type);
            if (type !== undefined && !isInputType(type)) {
                const variableName = node.variable.name.value;
                const typeName = print(node.type);
                context.reportError(new GraphQLError(`Variable "$${variableName}" cannot be non-input type "${typeName}".`, { nodes: node.type }));
            }
        },
    };
}