1. Creates a custom content entity name Movie with the fields title and release date
2. Create a taxonomy vocabulary named Genre with the following terms: Comedy, Drama, and Action.
3. Add a genre field to the movie entity that is a reference to the Genre vocabulary.
4. Add validation to the movie entity’s add and edit forms so that the release_date field is required and that it cannot be in the future.
5. Expose a REST export for all the Movie entities.

Download and install as any other drupal module.

1. Add david4lim/custom_movies to your composer.json repositories:

    "repositories": [
        {
            "type": "composer",
            "url": "https://packages.drupal.org/8"
        },
        {
            "type": "package",
            "package": {
                "name": "david4lim/custom_movies",
                "version": "dev-master",
                "type":"drupal-custom-module",
                "source": {
                    "url": "https://github.com/david4lim/custom_movies",
                    "type": "git",
                    "reference": "master"
                }
            }
        }
    ]

2. Add the composer package:

composer require david4lim/custom_movies:dev-master

3. Install the module using drush:

drush en custom_movies

All the CRUD action can be found in /admin/content/movie.

The movies export is accessible from the path /movies?_format=json, only json format is enabled, so it can also be accessed using only/movies and json format will be used.

1. The movie entity was generated using the drush command drush gen entity:content.
2. The release date validation was done by creating a new field constraint plugin, and adding it to the release_date field definition.
3. All javascript alterations were done in the library custom_movies/movies.admin_form.