django-js-choices

Overview

Django JS Choices makes handling of model field choices in javascript easy.

For example, given the model...

# models.py:

class Student(models.Model):
    FRESHMAN = 'FR'
    SOPHOMORE = 'SO'
    JUNIOR = 'JR'
    SENIOR = 'SR'
    YEAR_IN_SCHOOL_CHOICES = (
        (FRESHMAN, 'Freshman'),
        (SOPHOMORE, 'Sophomore'),
        (JUNIOR, 'Junior'),
        (SENIOR, 'Senior'),
    )
    year_in_school = models.CharField(
        max_length=2,
        choices=YEAR_IN_SCHOOL_CHOICES,
        default=FRESHMAN,
    )

...the choices are accesible in javascript.

Choices.pairs("year_in_school");

Result:

[
    {value: "FR", label: "Freshman"},
    {value: "SO", label: "Sophomore"},
    {value: "JR", label: "Junior"},
    {value: "SR", label: "Senior"}
]

Display values are also accesible.

Choices.display("year_in_school", "FR")
Choices.display("year_in_school", {"year_in_school": "FR"})

In both cases the result is

"Freshman"

Installation

Install using pip...

pip install django-js-choices

...or clone the project from GitHub.

git clone https://github.com/lorinkoz/django-js-choices.git

Add 'django_js_choices' to your INSTALLED_APPS setting.

INSTALLED_APPS = (
    ...
    'django_js_choices',
)

Usage as static file

First generate static file by

python manage.py collectstatic_js_choices

If you add apps, models, or change some existing choices, you may update the choices.js file by running the command again.

The choices files is created with the locale prefix defined in your settings, but you can pass any locale to the command...

python manage.py collectstatic_js_choices --locale es

In this case, the generated file will be choices-es.js.

After this add the file to your template.

<script src="{% static 'choices-es.js' %}"></script>

Usage with views

Include non-cached view...

from django_js_choices.views import choices_js

urlpatterns = [
    path("jschoices/", choices_js, name="js_choices"),
]

...or use cache to save some bandwith.

from django_js_choices.views import choices_js

urlpatterns = [
    path("jschoices/", cache_page(3600)(choices_js), name="js_choices"),
]

Include javascript in your template.

<script src="{% url 'js_choices' %}" type="text/javascript"></script>

Usage as template tag

If you want to generate the javascript code inline, use the template tag.

{% load js_choices %}
<script type="text/javascript" charset="utf-8">
    {% js_choices_inline %}
</script>

Use the choices in javascript

For every model field with choices, they will be available by the following names.

Choices.pairs("<app_label>_<model_name>_<field_name>")
Choices.pairs("<model_name>_<field_name>")
Choices.pairs("<field_name>")

If any of these names conflict with other model fields, the conflicting names won't be accessible to prevent ambiguity.

Register other choices not in models

If you have some choices you want to expose to javascript, and they don't fit into any model, lets say for example, a list of actions, you can add those too:

from django_js_choices.core import register_choice

POSSIBLE_ACTIONS = (
    ("go_down", "Go down"),
    ("go_top", "Go top"),
    ("nothing", "Stay")
)
...
# register_choice(name: string, choices: list)
register_choice("possible_actions", POSSIBLE_ACTIONS)

• If any of the names of a manually registered choice conflicts with some model fields, the one you manually registered will be the one you'll access.
• The 2nd argument is the same type that you'd pass to a CharField choices argument.

You can only access the POSSIBLE_ACTIONS choices through the name possible_actions

PLEASE NOTE: You must ensure the file where you are registering your choice is been processed by django

Choices.pairs("possible_actions")

Options

Optionally, you can overwrite the default javascript variable 'Choices' used to access the choices by Django setting.

JS_CHOICES_JS_VAR_NAME = 'Choices'

Optionally, you can change the name of the global object the javascript variable used to access the choices is attached to. Default is this.

JS_CHOICES_JS_GLOBAL_OBJECT_NAME = 'window'

Optionally, you can disable the minfication of the generated javascript file by Django setting.

JS_CHOICES_JS_MINIFY = False

Contributing

• PRs are welcome!
• To run the test suite run make or make coverage. The tests for this project live inside a small django project called djsc_sandbox.

Credits

Inspired by (and conceptually forked from) django-js-reverse