How to add a custom model?
==========================

In some cases you may be needing to add new models to your application in order to cover unique business needs.
The process of extending Sylius with new entities is simple and intuitive.

As an example we will take a **Supplier entity**, which may be really useful for shop maintenance.

1. Define your needs
--------------------

A Supplier needs three essential fields: ``name``, ``description`` and ``enabled`` flag.

2. Generate the entity
----------------------

Symfony, the framework Sylius uses, provides the `SensioGeneratorBundle <http://symfony.com/doc/current/bundles/SensioGeneratorBundle/index.html>`_,
that simplifies the process of adding a model, or the `SymfonyMakerBundle <https://symfony.com/doc/current/bundles/SymfonyMakerBundle/index.html>`_ for Symfony 4.

.. warning::

    Remember to have the ``SensioGeneratorBundle`` (or SymfonyMakerBundle depending on your Symfony version) imported in the AppKernel, as it is not there by default.

You need to use such a command in your project directory.

With the Generator Bundle

.. code-block:: bash

    php bin/console generate:doctrine:entity

With the Maker Bundle

.. code-block:: bash

    php bin/console make:entity

The generator will ask you for the entity name and fields. See how it should look like to match our assumptions.

.. image:: ../../_images/generating_entity.png
    :align: center

3. Update the database using migrations
---------------------------------------

Assuming that your database was up-to-date before adding the new entity, run:

.. code-block:: bash

    php bin/console doctrine:migrations:diff

This will generate a new migration file which adds the Supplier entity to your database.
Then update the database using the generated migration:

.. code-block:: bash

    php bin/console doctrine:migrations:migrate

4. Add ResourceInterface to your model class
--------------------------------------------

Go to the generated class file and make it implement the ``ResourceInterface``:

.. code-block:: php

    <?php

    namespace App\Entity;

    use Sylius\Component\Resource\Model\ResourceInterface;

    class Supplier implements ResourceInterface
    {
        // ...
    }

5. Register your entity as a Sylius resource
--------------------------------------------

If you don't have it yet, create a file ``config/packages/sylius_resource.yaml``.

.. code-block:: yaml

    # config/packages/sylius_resource.yaml
    sylius_resource:
        resources:
            app.supplier:
                driver: doctrine/orm # You can use also different driver here
                classes:
                    model: App\Entity\Supplier

To check if the process was run correctly run such a command:

.. code-block:: bash

    php bin/console debug:container | grep supplier

The output should be:

.. image:: ../../_images/container_debug_supplier.png
    :align: center

6. Optionally try to use Sylius API to create new resource
----------------------------------------------------------

See how to work with API in :doc:`the separate cookbook here </cookbook/api/api>`.

.. note::

    Using API is not mandatory. It is just a nice moment for you to try it out. If you are not interested go to the next point of this cookbook.

7. Define grid structure for the new entity
-------------------------------------------

To have templates for your Entity administration out of the box you can use Grids. Here you can see how to configure a grid for the Supplier entity.

.. code-block:: yaml

    # config/packages/_sylius.yaml
    sylius_grid:
        grids:
            app_admin_supplier:
                driver:
                    name: doctrine/orm
                    options:
                        class: App\Entity\Supplier
                fields:
                    name:
                        type: string
                        label: sylius.ui.name
                    description:
                        type: string
                        label: sylius.ui.description
                    enabled:
                        type: twig
                        label: sylius.ui.enabled
                        options:
                            template: "@SyliusUi/Grid/Field/enabled.html.twig"
                actions:
                    main:
                        create:
                            type: create
                    item:
                        update:
                            type: update
                        delete:
                            type: delete

8. Define routing for entity administration
-------------------------------------------

Having a grid prepared we can configure routing for the entity administration:

.. code-block:: yaml

    # config/routes.yaml
    app_admin_supplier:
        resource: |
            alias: app.supplier
            section: admin
            path: admin
            templates: SyliusAdminBundle:Crud
            redirect: update
            grid: app_admin_supplier
            vars:
                all:
                    subheader: app.ui.supplier
                index:
                    icon: 'file image outline'
        type: sylius.resource

9. Add entity administration to the admin menu
----------------------------------------------

.. tip::

    See :doc:`how to add links to your new entity administration in the administration menu </customization/menu>`.

9. Check the admin panel for your changes
-----------------------------------------

.. tip::

    To see what you can do with your new entity access the ``http://localhost:8000/admin/suppliers/`` url.

Learn more
----------

* `GridBundle documentation <https://github.com/Sylius/SyliusGridBundle/blob/master/docs/index.md>`_
* `ResourceBundle documentation <https://github.com/Sylius/SyliusResourceBundle/blob/master/docs/index.md>`_
* :doc:`Customization Guide </customization/index>`
