EZDjangoCommon

ez_django_common is a Django package designed to simplify and standardize common tasks in Django projects. It provides a set of utilities, custom responses, admin enhancements, and other reusable components that can be easily integrated into any Django project. This package aims to reduce boilerplate code and improve consistency across your Django applications.

Features

• Custom Admin Enhancements: Enhanced Django admin interface with custom widgets, inline models, and improved form handling.
• Custom Responses: Standardized API responses with support for pagination, error handling, and success messages.
• JWT Utilities: Custom JWT token views for authentication.
• Model Mixins: Reusable mixins for common CRUD operations in Django viewsets.
• Permissions: Customizable Django model permissions with support for additional permissions.
• Utilities: Helper functions for logging, SMS, and file uploads.

Installation

You can install ez_django_common via pip:

pip install ez-django-common

Or if you want to install from source, you can run this command to install the package:

pip install git+https://github.com/ezhoosh/EZDjangoCommon.git

Optional Features

Watchlog (OpenTelemetry Integration)

If you want to use the watchlog feature for distributed tracing with OpenTelemetry, install with the watchlog extra:

pip install ez-django-common[watchlog]

Or from source:

pip install "ez-django-common[watchlog] @ git+https://github.com/ezhoosh/EZDjangoCommon.git"

This will install the required OpenTelemetry packages:

• opentelemetry-api
• opentelemetry-sdk
• opentelemetry-exporter-otlp
• opentelemetry-instrumentation
• opentelemetry-instrumentation-django

Then add these packages to INSTALLED_APPS:

INSTALLED_APPS = [
    'ez_django_common',
    'image_uploader_widget',
    'tinymce',
    ...
]

Usage

Custom Admin Enhancements

BaseModelAdmin

The BaseModelAdmin class provides a set of default configurations for Django admin models, including custom widgets for text and file fields.

from ez_django_common.admin import BaseModelAdmin
from django.contrib import admin
from .models import MyModel

@admin.register(MyModel)
class MyModelAdmin(BaseModelAdmin):
    list_display = ('name', 'created_at')

Custom Inlines

The package provides custom inline classes (TabularInline, StackedInline, NonrelatedTabularInline, NonrelatedStackedInline) that can be used to organize inline models in the admin interface.

from ez_django_common.admin import TabularInline
from django.contrib import admin
from .models import MyModel, RelatedModel

class RelatedModelInline(TabularInline):
    model = RelatedModel

@admin.register(MyModel)
class MyModelAdmin(BaseModelAdmin):
    inlines = [RelatedModelInline]

Unfold

To use unfold for panel admin, first add unfold to INSTALLED_APPS:

INSTALLED_APPS = [
    'unfold', # before django.admin.contrib
    ...
]

then use BaseModelAdmin instead of admin.ModelAdmin in admin classes:

from ez_django_common.admin import BaseModelAdmin

@admin.register(ModelName)
class ModelNameAdmin(BaseModelAdmin):
    ...

Custom Responses

The enveloper function wraps your serializers in a standardized response format, including fields for data, error, and message.

from ez_django_common.custom_responses.enveloper import enveloper

@extend_schema(
    responses=enveloper(SampleRetrieveSerializer, many=False),
)
def retrieve(self, request, *args, **kwargs):
    return super().retrieve(request, *args, **kwargs)

Or if your response is a list of objects:

from ez_django_common.custom_responses.enveloper import enveloper_pagination

@extend_schema(
    ...
    responses=enveloper_pagination(SampleRetrieveSerializer, many=True),
)
def list(self, request, *args, **kwargs):
    return super().list(request, *args, **kwargs)

Custom Exception Handler

The custom_exception_handler provides a standardized way to handle exceptions in your Django REST Framework views.

REST_FRAMEWORK = {
    ...
    "EXCEPTION_HANDLER": "ez_django_common.custom_responses.exception.custom_exception_handler",
    ...
}

JWT Utilities

• CustomTokenViewBase

The CustomTokenViewBase class provides a base for custom JWT token views, including token refresh and verification.

from ez_django_common.custom_responses.jwt import CustomTokenRefreshView, CustomTokenVerifyView
from rest_framework_simplejwt.views import TokenRefreshView, TokenVerifyView

urlpatterns = [
    path('token/refresh/', CustomTokenRefreshView.as_view(), name='token_refresh'),
    path('token/verify/', CustomTokenVerifyView.as_view(), name='token_verify'),
]

Model Mixins

The package includes several mixins for common CRUD operations in Django viewsets.

from ez_django_common.custom_responses.viewsets import CustomModelViewSet
from .models import MyModel
from .serializers import MySerializer

class MyModelViewSet(CustomModelViewSet):
    queryset = MyModel.objects.all()
    serializer_class = MySerializer

Permissions

• CustomDjangoModelPermissions

The CustomDjangoModelPermissions class extends Django's default model permissions, allowing you to add additional permissions.

from ez_django_common.permissions import get_custom_model_permissions
from rest_framework.permissions import IsAuthenticated

permission_classes = [IsAuthenticated, get_custom_model_permissions(['myapp.view_mymodel'])]

Auto-Translation (Optional)

The BaseModel includes automatic translation functionality for Django models with django-modeltranslation. To enable this feature:

1. Install the required dependencies:

pip install googletrans==4.0.0rc1 django-modeltranslation

2. Add to your Django settings:

# Enable auto-translation
AUTO_TRANSLATE_ENABLED = True

# Configure languages (required for translation)
LANGUAGES = [
    ('en', 'English'),
    ('fa', 'Persian'),
    ('ar', 'Arabic'),
]
LANGUAGE_CODE = 'en'  # Default language

3. Use the BaseModel in your models:

from ez_django_common.models import BaseModel

class MyModel(BaseModel):
    title = models.CharField(max_length=200)
    description = models.TextField()

# When you save an instance, missing translations will be automatically generated

Note: Auto-translation only works if:

• AUTO_TRANSLATE_ENABLED = True in settings
• django-modeltranslation is installed and configured
• googletrans library is available
• Your model is registered with modeltranslation

Watchlog (OpenTelemetry Integration)

The watchlog feature provides distributed tracing capabilities using OpenTelemetry. To use this feature:

1. Install with the watchlog extra:

pip install ez-django-common[watchlog]

2. Add to your Django settings:

# Enable watchlog
USE_WATCHLOG = True

# Configure Watchlog service
WATCHLOG_SERVICE_NAME = 'my-django-service'
WATCHLOG_SERVICE_ENDPOINT = 'http://watchlog-agent:3774/apm/YOUR_APP_NAME/v1/traces'

3. The package will automatically instrument your Django application with OpenTelemetry when USE_WATCHLOG = True.

4. (Optional) To add request/response tracing middleware, add it to your Django settings:

MIDDLEWARE = [
    # ... other middleware
    'ez_django_common.middleware.OpenTelemetryMiddleware',  # Only if watchlog extra is installed
    # ... other middleware
]

Important:

• The OpenTelemetry dependencies are only installed when you use the [watchlog] extra.
• If you don't need distributed tracing, you can install the base package without these dependencies.
• If you set USE_WATCHLOG = True or try to use OpenTelemetryMiddleware without installing the watchlog extra, you will get a helpful error message telling you to install it.

Utilities

• Upload_to

The upload_to function provides a standardized way to handle file uploads in Django models.

from ez_django_common.storages import upload_to
from django.db import models

def upload_to_path(instance, filename):
    return upload_to(instance, filename, folder="path")

class MyModel(models.Model):
    file = models.FileField(upload_to=upload_to_path)