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django-model-signals-0.4.2
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Django Model Signals makes it easier to keep model related business logic in your Django models by allowing them to become transceivers of their own signals, including bulk signals.
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | django-model-signals-0.4.2 |
| نام | django-model-signals |
| نسخه کتابخانه | 0.4.2 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | - |
| ایمیل نویسنده | Digital Valley <techteam@digitalvalley.nl> |
| آدرس صفحه اصلی | - |
| آدرس اینترنتی | https://pypi.org/project/django-model-signals/ |
| مجوز | - |
# Django Model Signals
Django Model Signals makes it easier to keep business logic in your Django
models by allowing them to become transceivers of their own signals, including
bulk signals.
## Installation
```
pip install django-model-signals
```
## Configuration
Add the `django_model_signals` app to your `INSTALLED_APPS`:
```
INSTALLED_APPS = [
# ...
'django_model_signals',
]
```
## Usage
- Add a `ModelSignalsMeta` inner class to your Django model and specify which
signals you want to connect.
- To enable the `pre_bulk_save` and `post_bulk_save` signals, add the
`ModelSignalsManager` to your Django model's `objects` property.
- To enable the `pre_full_clean`, `post_full_clean` and `post_full_clean_error`
signals, inherit from the `FullCleanSignalsMixin` in your Django model.
- To enable the `post_save_error` signal, inherit from the
`PostSaveErrorSignalMixin` in your Django model.
- Implement the receiver methods for the connected signals in your Django
model.
## Example
```python
from django.db.models import Model
from django_model_signals.manager import ModelSignalsManager
from django_model_signals.models import (
FullCleanSignalsMixin,
PostSaveErrorSignalMixin
)
class MyModel(
FullCleanSignalsMixin,
PostSaveErrorSignalMixin,
Model
):
@classmethod
def pre_init(cls, **kwargs):
pass
def post_init(self, **kwargs):
pass
def pre_full_clean(self, **kwargs):
pass
def post_full_clean(self, **kwargs):
pass
def post_full_clean_error(self, **kwargs):
raise kwargs['error']
def pre_save(self, **kwargs):
pass
def post_save(self, **kwargs):
pass
def post_save_error(self, **kwargs):
raise kwargs['error']
def pre_delete(self, **kwargs):
pass
def post_delete(self, **kwargs):
pass
def m2m_changed(self, **kwargs):
pass
@classmethod
def pre_bulk_save(cls, **kwargs):
pass
@classmethod
def post_bulk_save(cls, **kwargs):
pass
objects = ModelSignalsManager()
class ModelSignalsMeta:
signals = [
'pre_init',
'post_init',
'pre_full_clean',
'post_full_clean',
'post_full_clean_error',
'pre_save',
'post_save',
'post_save_error',
'pre_delete',
'post_delete',
'm2m_changed',
'pre_bulk_save',
'post_bulk_save'
]
```
## Notes
- The following actions are supported for triggering the implemented signals:
- Creating or loading an model instance from the database will trigger the
`pre_init` and `post_init` signals.
- Calling `Model.full_clean` will trigger the `pre_full_clean` and
`post_full_clean` signals.
- An error during `Model.full_clean` will trigger the `post_full_clean_error`
signal.
- Calling `Model.save` will trigger the `pre_save` and `post_save` signals.
- An error during `Model.save` will trigger the `post_save_error` signal.
- Calling `Model.delete` will trigger the `pre_delete` and `post_delete`
signals.
- Calling `Model.objects.create` will trigger the `pre_save` and `post_save`
signals.
- Calling `Model.objects.get_or_create` will trigger the `pre_save` and
`post_save` signals.
- Calling `Model.objects.update_or_create` will trigger the `pre_save` and
`post_save` signals.
- Calling `Model.objects.bulk_create` will trigger the `pre_bulk_save` and
`post_bulk_save` signals.
- Calling `Model.objects.bulk_update` will trigger the `pre_bulk_save` and
`post_bulk_save` signals.
- Calling `QuerySet.delete` will trigger the `pre_delete` and `post_delete`
signals.
- To implement the `pre_full_clean` and `post_full_clean`,
`post_full_clean_error` and `post_save_errors` signals, this library
overrides the `full_clean` and `save` methods of Django models and calls the
original method in a backwards compatible way. However, make sure the order
of the classes inherited from is the same as the above example to ensure the
proper method resolution order.
- The `post_full_clean_error` and `post_save_error` signals are not actually
called as signals, but the receiver methods are called directly. This allows
you to suppress, change or re-raise the error.
## Resources
- Django: https://www.djangoproject.com/
نیازمندی
| مقدار | نام |
|---|---|
| - | django |
زبان مورد نیاز
| مقدار | نام |
|---|---|
| >=3.7 | Python |
نحوه نصب
نصب پکیج whl django-model-signals-0.4.2:
pip install django-model-signals-0.4.2.whl
نصب پکیج tar.gz django-model-signals-0.4.2:
pip install django-model-signals-0.4.2.tar.gz