Vision is not a constructor

I’m using the current release, and tried:

const {Vision} = require('@google-cloud/vision');

const token = {} //json for the google application credential

const vision = new Vision(token);

But it yields error that vision is not a constructor. What am I missing?

[alexander-fenster]

@bcoe @JustinBeckwith FYI - the codelab example is out of date

[bpkennedy]

Ah, I inspected the ImageAnnotatorClient export and see where the credential can be passed in as an option of that class constructor:

  /**
   * Construct an instance of ImageAnnotatorClient.
   *
   * @param {object} [options] - The configuration object. See the subsequent
   *   parameters for more details.
   * @param {object} [options.credentials] - Credentials object.
   * @param {string} [options.credentials.client_email]
   * @param {string} [options.credentials.private_key]
   * @param {string} [options.email] - Account email address. Required when
   *     using a .pem or .p12 keyFilename.
   * @param {string} [options.keyFilename] - Full path to the a .json, .pem, or
   *     .p12 key downloaded from the Google Developers Console. If you provide
   *     a path to a JSON file, the projectId option below is not necessary.
   *     NOTE: .pem and .p12 require you to specify options.email as well.
   * @param {number} [options.port] - The port on which to connect to
   *     the remote host.
   * @param {string} [options.projectId] - The project ID from the Google
   *     Developer's Console, e.g. 'grape-spaceship-123'. We will also check
   *     the environment variable GCLOUD_PROJECT for your project ID. If your
   *     app is running in an environment which supports
   *     {@link https://developers.google.com/identity/protocols/application-default-credentials Application Default Credentials},
   *     your project ID will be detected automatically.
   * @param {function} [options.promise] - Custom promise module to use instead
   *     of native Promises.
   * @param {string} [options.servicePath] - The domain name of the
   *     API remote host.
   */

So, I implemented as thus which seems to work fine:

import Vision from '@google-cloud/vision';

new Vision.ImageAnnotatorClient({
    credentials: token
  });

This seems to work fine, but it does go against some documentation I read earlier (see the Passing the path to the service account key in code). It describes:

// Imports the Google Cloud client library.
const {Storage} = require('@google-cloud/storage');

// Instantiates a client. Explicitly use service account credentials by
// specifying the private key file. All clients in google-cloud-node have this
// helper, see https://github.com/GoogleCloudPlatform/google-cloud-node/blob/master/docs/authentication.md
const storage = new Storage({
  projectId: 'project-id',
  keyFilename: '/path/to/keyfile.json'
});

Event though it describes the storage API, I took this to mean that vision also exported a “vision” class which accepts a credential object just like storage, but this is not the case and had me confused.

I suggest changing the wording of “All clients in google-cloud-node have this” for clarity.