graphql/validation/rules/ScalarLeafs.js

A Query Language and Runtime which can target any service.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.noSubselectionAllowedMessage = noSubselectionAllowedMessage;
exports.requiredSubselectionMessage = requiredSubselectionMessage;
exports.ScalarLeafs = ScalarLeafs;

var _inspect = _interopRequireDefault(require("../../jsutils/inspect"));

var _GraphQLError = require("../../error/GraphQLError");

var _definition = require("../../type/definition");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 *  strict
 */
function noSubselectionAllowedMessage(fieldName, type) {
  return "Field \"".concat(fieldName, "\" must not have a selection since ") + "type \"".concat(type, "\" has no subfields.");
}

function requiredSubselectionMessage(fieldName, type) {
  return "Field \"".concat(fieldName, "\" of type \"").concat(type, "\" must have a ") + "selection of subfields. Did you mean \"".concat(fieldName, " { ... }\"?");
}
/**
 * Scalar leafs
 *
 * A GraphQL document is valid only if all leaf fields (fields without
 * sub selections) are of scalar or enum types.
 */


function ScalarLeafs(context) {
  return {
    Field: function Field(node) {
      var type = context.getType();
      var selectionSet = node.selectionSet;

      if (type) {
        if ((0, _definition.isLeafType)((0, _definition.getNamedType)(type))) {
          if (selectionSet) {
            context.reportError(new _GraphQLError.GraphQLError(noSubselectionAllowedMessage(node.name.value, (0, _inspect.default)(type)), [selectionSet]));
          }
        } else if (!selectionSet) {
          context.reportError(new _GraphQLError.GraphQLError(requiredSubselectionMessage(node.name.value, (0, _inspect.default)(type)), [node]));
        }
      }
    }
  };
}