graphql-paper/validations/validators/scalar-field.js

A flexible in-memory store based on a GraphQL Schema

'use strict';

var graphql = require('graphql');
var fieldReturnTypeMismatch = require('../errors/field-return-type-mismatch.js');
const scalarFieldValidator = {
  skipConnectionValue: false,
  skipNullValue: true,
  validate({
    field,
    fieldValue
  }) {
    const jsScalars = ['boolean', 'number', 'string', 'float'];
    if (graphql.isScalarType(field.type) && !jsScalars.includes(typeof fieldValue)) {
      throw new fieldReturnTypeMismatch.FieldReturnTypeMismatch({
        field: field,
        expected: 'boolean, number, string',
        actual: typeof fieldValue
      });
    }
  }
};
exports.scalarFieldValidator = scalarFieldValidator;
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