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Creating a Tweet Field Type

Getting the code

The code created in this tutorial is available on GitHub: (

This tutorial covers the creation and development of a custom eZ Platform Field Type. Field Types are the smallest building blocks of content. eZ Platform comes with about 30 native types that cover most common needs (Text line, Rich text, Email, Author list, Content relation, Map location, Float, etc.)

Field Types are responsible for:

  • Storing data, either using the native storage engine mechanisms or specific means
  • Validating input data
  • Making the data searchable (if applicable)
  • Displaying Fields of this type

Custom Field Types are a very powerful type of extension, since they allow you to hook deep into the content model.

You can find the in-depth documentation about Field Types and their best practices here. It describes how each component of a Field Type interacts with the various layers of the system, and how to implement those.

Intended audience

This tutorial is aimed at developers who are familiar with eZ Platform and are comfortable with operating in PHP and Symfony.

Content of the tutorial

This tutorial will demonstrate how to create a Field Type on the example of a Tweet Field Type. It will:


To start the tutorial, you need to make a clean eZ Platform installation. Follow the guide for your system from Install eZ Platform. Remember to install using the dev environment.


The tutorial will lead you through the following steps:

1. The bundle

Field Types, like any other eZ Platform plugin, must be provided as Symfony2 bundles. This chapter covers the creation and organization of this bundle. Read more about creating the bundle.

2. API

This part covers the implementation of the eZ Platform API elements required to implement a custom Field Type. Read more about implementing the Tweet\Value class and the Tweet\Type class.

3. Converter

Storing data from any Field Type in the Legacy Storage Engine requires that your custom data is mapped to the data model. Read more about implementing the Legacy Storage Engine Converter.

4. Templating

Displaying a Field Type's data is done through a Twig template. Read more about implementing the Field Type template.

5. PlatformUI integration

Viewing and editing values of the Field Type in PlatformUI requires that you extend PlatformUI, using mostly JavaScript.

You should ideally read the general extensibility documentation for PlatformUI. You can find information about view templates in the next tutorial. Edit templates are not documented at the time of writing, but Netgen has published a tutorial that covers the topic: (

Final result of the tutorial

Start the tutorial

Read the Docs