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توضیحات

Neat QuerySet filter for django apps with filterforms based on django forms

ویژگی	مقدار
سیستم عامل	-
نام فایل	datafilters-0.3.3
نام	datafilters
نسخه کتابخانه	0.3.3
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	Nikolay Zakharov
ایمیل نویسنده	nikolay@desh.su
آدرس صفحه اصلی	https://github.com/freevoid/django-datafilters
آدرس اینترنتی	https://pypi.org/project/datafilters/
مجوز	MIT

.. image:: https://secure.travis-ci.org/freevoid/django-datafilters.png?branch=master :target: http://travis-ci.org/freevoid/django-datafilters Abstract ======== Library to implement reusable queryset filtering for django-powered websites. This library provides a way to declaratively define filter specifications in a django-forms manner. Such forms can be used as ordinary django forms and they also provides a method ``filter`` to perform filtering of arbitrary querysets. This approach is somewhat differs from one in django-admin, but it looks more intuitive and straightforward for the author. Main features: * forms-based declaration and usage; * simple API; * easy to implement and reuse abstract filter specs of any complexity (from standard lookups to ``QuerySet.extra`` calls); * runtime-aware filtering; * a number of builtin specs for simple cases. Usage ===== For concrete usage example, see ``sample_proj/polls/views.py``. To perform filtering one must define a subclass of ``datafilters.filterform.FilterForm`` (base class for filter forms). The typical declaration consists of class attributes declaring filter specifications, subclasses of ``datafilters.filterspec.FilterSpec``. This tandem is very much like the ``Form`` and ``Field`` pair. ``FilterSpec`` subclass defines a corresponding form field that will be used to render and validate a django form and it also defines a method to get lookup conditions based on user input (``to_lookup``). There is a bunch of builtin specs so typicaly it is not necessary to implement your own filter specs for simple filtering. For example purposes we will use models from django tutorial: ``Choice`` and ``Question``. The typical filter form looks like that:: from datafilters.filterform import FilterForm from datafilters.specs import ContainsFilterSpec, \ SelectBoolFilterSpec class ChoicesFilterForm(FilterForm): choice_text = ContainsFilterSpec('choice', label='Choice contains text') question_text = ContainsFilterSpec('poll__question', label='Question contains text') has_votes = GreaterThanZeroFilterSpec('votes') Direct usage of filter form --------------------------- Defined form can be used directly:: from django.shortcuts import render_to_response from polls.models import Choice def choice_list(request): choices = Choice.objects.all() filterform = ChoicesFilterForm(request.GET) if filterform.is_valid(): choices = filterform.filter(choices) return render_to_response('polls/choice_list.html', { 'choices': choices, 'filterform': filterform, }) ``filter_powered`` decorator ---------------------------- There is a decorator to remove bottlenecks when using filtering extensively:: from django.template.response import TemplateResponse from datafilters.decorators import filter_powered @filter_powered(ChoicesFilterForm, queryset_name='choices') def choice_list(request): choices = Choice.objects.all() return TemplateResponse('polls/choice_list.html', {'choices': choices}) View mixin ---------- If you are using django class-based views there is another option to take: a view mixin ``FilterFormMixin``. Example:: from django.views.generic import ListView class ChoiceListView(FilterFormMixin, ListView): model = Choice filter_form_cls = ChoicesFilterForm choice_list = ChoiceListView.as_view() Usage in templates ------------------ In our template we can use new context variable ``filterform`` as an ordinary django form:: <form class="filter" method="get" action=""> {{ filterform.as_p }} <input type="submit" value="Apply filter" /> </form> Requirements ============ * Django >= 1.3; * `django-forms-extras <http://github.com/freevoid/django-forms-extras>`_ for some of builtin specifications (optional). Copyright ========= 2010-2013, Nikolay Zakharov.

نحوه نصب

نصب پکیج whl datafilters-0.3.3:

pip install datafilters-0.3.3.whl

نصب پکیج tar.gz datafilters-0.3.3:

pip install datafilters-0.3.3.tar.gz