[django-angular](https://github.com/jrief/django-angular)

([project examples website](https://django-angular.awesto.com/classic_form/))

is a library with helper code to make it easier to use

[Angular](/angular.html) as the front-end to [Django](/django.html) projects.

The code for django-angular is

[open source under the MIT license](https://github.com/jrief/django-angular/blob/master/LICENSE.txt).

The following example shows how to check if an Django app is specified

under `INSTALLED_APPS` and if not, throw an exception to let the developer

know their project is not properly configured.

[**django-angular / djng / forms / fields.py**](https://github.com/jrief/django-angular/blob/master/djng/forms/fields.py)

from __future__ import unicode_literals

import re

import mimetypes

~~from django.conf import settings

from django.contrib.staticfiles.storage import staticfiles_storage

from django.core import signing

from django.core.exceptions import ImproperlyConfigured, ValidationError

from django.core.files.storage import default_storage

from django.core.files.uploadedfile import InMemoryUploadedFile, TemporaryUploadedFile

from django.urls import reverse_lazy

from django.forms import fields, models as model_fields, widgets

from django.utils.html import format_html

from django.utils.module_loading import import_string

from django.utils.safestring import mark_safe

from django.utils.translation import ugettext_lazy as _, ungettext_lazy

class ImageField(FileFieldMixin, fields.ImageField):

storage = app_settings.upload_storage

signer = signing.Signer()

def __init__(self, *args, **kwargs):

~~ if 'easy_thumbnails' not in settings.INSTALLED_APPS:

~~ raise ImproperlyConfigured("'djng.forms.fields.ImageField' \

~~ requires 'easy-thubnails' to be installed")

accept = kwargs.pop('accept', 'image/*')

fileupload_url = kwargs.pop('fileupload_url',

reverse_lazy('fileupload'))

area_label = kwargs.pop('area_label',

_("Drop image here or click to upload"))

attrs = {

'accept': accept,

'ngf-pattern': accept,

}

kwargs.update(widget=DropImageWidget(area_label,

fileupload_url,

attrs=attrs))

super(ImageField, self).__init__(*args, **kwargs)