Django Duplicator 🔁

A lightweight mixin for Django Admin that adds object duplication functionality, both in bulk (via an Admin Action) and for single objects (via a "Duplicate and continue editing" button on the change form).

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✨ Key Features

• Single Object Duplication: A "Duplicate and continue editing" button appears on the object detail page.
• Bulk Duplication (Admin Action): An Admin Action is provided to duplicate selected objects from the changelist page.
• Data Control: Easily exclude specific fields from duplication to ensure data integrity (e.g., unique fields, timestamps).
• DRY and Flexible: Uses simple model and Admin mixins that are easy to integrate into any Django model.

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💻 Installation

  pip install django-duplicator

Add duplicator to your INSTALLED_APPS in settings.py:

# settings.py
INSTALLED_APPS = [
    # ...
    'django.contrib.admin',
    # ...
    'duplicator',
]

🚀 Usage

1. Model (Enabling Duplication)

To make your model duplicatable, you must inherit from DuplicatorMixin.

# models.py
from django.db import models
from duplicator import DuplicatorMixin


class Customer(DuplicatorMixin, models.Model):
    name = models.CharField(max_length=255)

    # ... other fields ...

    def __str__(self):
        return self.name

2. Admin (Enabling Buttons and Actions)

To enable both the single duplication button and the bulk duplication Admin Action, inherit from DuplicatorAdminMixin.

# admin.py
from django.contrib import admin
from duplicator import DuplicatorAdminMixin
from .models import Customer


@admin.register(Customer)
class CustomerAdmin(DuplicatorAdminMixin, admin.ModelAdmin):
    list_display = ('name', 'id')
    # ... other admin configurations ...

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⚙️ Customization: Excluding Fields (Safety Feature)

By default, the duplicator performs a shallow copy of all fields. You can prevent specific fields (like unique fields, slugs, or timestamps) from being copied by defining the DUPLICATOR_EXCLUDE_FIELDS list in your model.

Fields in this list will be ignored during the copy process and will revert to their model's default value or None ( behaving like a new record).

# models.py
from duplicator import DuplicatorMixin


class Product(DuplicatorMixin, models.Model):
    # 🛡️ EXCLUDE FIELDS: Use this list to prevent certain fields from being copied.
    DUPLICATOR_EXCLUDE_FIELDS = [
        'sku',  # Assuming 'sku' must be unique or has a default
        'created_at',  # Should be set to the current time by Django
        'last_modified',  # Should be updated by Django
    ]

    name = models.CharField(max_length=255)
    sku = models.CharField(max_length=100, unique=True)
    created_at = models.DateTimeField(auto_now_add=True)
    # ...

📸 Feature Demonstration

A. Bulk Duplication (Admin Action)

The duplication option appears in the Actions dropdown menu on the changelist page.

B. Single Duplication (Change Form Button)

The "Duplicate and continue editing" button is prominently placed on the object detail page.

🤝 Contributing

We welcome all contributions! If you find a bug or have a feature suggestion, please open an Issue or submit a Pull Request.

📄 License

This project is licensed under the [Your License Type, e.g., MIT License]. See the LICENSE file for full details.