معرفی شرکت ها
django-property-filter-1.1.2
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشترتوضیحات
Django Filter extension to support filtering by Properties
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | django-property-filter-1.1.2 |
| نام | django-property-filter |
| نسخه کتابخانه | 1.1.2 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Eric Ziethen |
| ایمیل نویسنده | ericziethen@gmail.com |
| آدرس صفحه اصلی | - |
| آدرس اینترنتی | https://pypi.org/project/django-property-filter/ |
| مجوز | MIT |
# Django Property Filter
Django-property-filter is an extension to [django-filter](https://pypi.org/projhttps://pypi.org/project/django-filter/ect/django-filter/) and provides functionality to filter querysets by class properties.
It does so by providing sub-classes for Filters and Filtersets to keep existing django-filter functionality.
<table>
<tr>
<td>License</td>
<td><img src='https://img.shields.io/pypi/l/django-property-filter.svg'></td>
<td>Version</td>
<td><img src='https://img.shields.io/pypi/v/django-property-filter.svg'></td>
</tr>
<tr>
<td>Github Action</td>
<td><img src='https://github.com/ericziethen/django-property-filter/workflows/CI/badge.svg'></td>
<td>Coverage</td>
<td><img src='https://codecov.io/gh/ericziethen/django-property-filter/branch/master/graph/badge.svg'></td>
</tr>
<tr>
<td>Wheel</td>
<td><img src='https://img.shields.io/pypi/wheel/django-property-filter.svg'></td>
<td>Implementation</td>
<td><img src='https://img.shields.io/pypi/implementation/django-property-filter.svg'></td>
</tr>
<tr>
<td>Status</td>
<td><img src='https://img.shields.io/pypi/status/django-property-filter.svg'></td>
<td>Downloads</td>
<td><img src='https://img.shields.io/pypi/dm/django-property-filter.svg'></td>
</tr>
<tr>
<td>Supported versions</td>
<td><img src='https://img.shields.io/pypi/pyversions/django-property-filter.svg'></td>
</tr>
</table>
For more details and examples check the [documentation](https://django-property-filter.readthedocs.io/en/stable/).
## Requirements
* Python: 3.7, 3.8, 3.9, 3.10, 3.11
* Django: 3.2, 4.0, 4.1
* Django-filter: 2.3+
## Limitations
### Performance
Because this app preserved Django Filtersets and filters them agains fields that are not Database fields all filtering happens in memory.
Compared with direct sql optimized queries that might be slower and more memory intensive.
### Limit on returned results
In theory there is no limit for most databases how many results can be returned from a filter query unless the database implements a limit which will impact how many results django-property-filter can return.
Sqlite3 defines different limits depending on the version used.
For further details see the documentation for [limitations](https://django-property-filter.readthedocs.io/en/stable/guide/overview.html#limitations)
## Installation
Install using pip:
```python
pip install django-property-filter
```
Then add 'django_property_filter' to your INSTALLED_APPS.
```python
INSTALLED_APPS = [
...
'django_property_filter',
]
```
## Usage
### Example Model
Our Model
```python
from django.db import models
class BookSeries(models.Model):
name = models.CharField(max_length=255)
@property
def book_count(self):
return Book.objects.filter(series=self).count()
class Book(models.Model):
title = models.CharField(max_length=255)
price = models.DecimalField()
discount_percentage = models.IntegerField()
author = models.TextField()
series = models.ForeignKey(BookSeries)
@property
def discounted_price(self):
return self.price * self.discount_percentage \ 100
```
### Implicit Filter Creation
If we want to filter by discounted price as well as number of books in a series,
which both are properties and not fields in the database, we would do the
following.::
```python
from django_property_filter import PropertyFilterSet, PropertyNumberFilter
class BookFilterSet(PropertyFilterSet):
class Meta:
model = Book
exclude = ['price']
property_fields = [
('discounted_price', PropertyNumberFilter, ['lt', 'exact']),
('series.book_count.', PropertyNumberFilter, ['gt', 'exact']),
]
```
This will create 4 Filters
1.) A "less than" and an "exact" filter for the "discounted_price" property
of the Book Model
2.) A "greater than" and an "exact" filter for the "book_count" property
of the related Model "series".
The order in which the property filters are applied are in the same order as
they are defined. In the above filter will be in order of
1.) discounted_price: lt
2.) discounted_price: exact
3.) series.book_count: gt
4.) series.book_count: exact
This can be usefull to speed up the filtering by property filters if filters
are defined first that are likely to filter a large number of values.
E.g. a boolean field might be filtering an average of half the values, while a
field representing a name will likely filter fewer.
Since PropertyFilterSet is and extension to django-filter's Filterset which
requires either the Meta attribute "fields" or "exclude" to be set we excluded
the "price" field. If we had instead used::
fields = ['price']
It would also have created an "exact" filter for the book price.
The only difference to using a normal FilterSet from django-filter is the
"property_fields" field.
The "property_fields" is a list of tuples with 3 values.
1.) The property name.
If the property is on a related Model it should be separated by "__",
and can span multiple levels e.g. fk__fk__fk__property
2.) The specific Property Filter to use.
This is necessary since it can't be determined what the return type
of the property will be in all cases
3.) The list of lookup expressions.
### Explicit Filter Creation
It is also possible to create Filters explicitely.
```python
from django_property_filter import PropertyNumberFilter, PropertyFilterSet
class BookFilterSet(PropertyFilterSet):
prop_number_gte = PropertyNumberFilter(field_name='discounted_price', lookup_expr='gte')
prop_number_lt = PropertyNumberFilter(field_name='discounted_price', lookup_expr='lt')
class Meta:
model = NumberClass
fields = ['prop_number_gte', 'prop_number_lt']
```
This creates a "greater than or equel" and a "less than" filter for the
discounted_price property.
The order in which the property filters are applied are in the same order as
they are defined. In the above filter will be in order of
1.) prop_number_gte
2.) prop_number_lt
This can be usefull to speed up the filtering by property filters if filters
are defined first that are likely to filter a large number of values.
E.g. a boolean field might be filtering an average of half the values, while a
field representing a name will likely filter fewer.
## Development
# Run the Django Test Project to see the filters in action
* go to "tests\django_test_proj"
* run "python manage.py makemigrations"
* run "python manage.py migrate"
* run "python manage.py setup_data"
* run "python manage.py runserver"
## Issue Raising ##
Raising bugs, feature requests and questions is possible via the public repository <a href="https://github.com/ericziethen/django-property-filter-issue-reporting" target="_blank">django-property-filter-issue-reporting</a>
نیازمندی
| مقدار | نام |
|---|---|
| >=3.2 | Django |
| >=2.3.0 | django-filter |
زبان مورد نیاز
| مقدار | نام |
|---|---|
| >=3.7 | Python |
نحوه نصب
نصب پکیج whl django-property-filter-1.1.2:
pip install django-property-filter-1.1.2.whl
نصب پکیج tar.gz django-property-filter-1.1.2:
pip install django-property-filter-1.1.2.tar.gz