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TemplateTag to call a method / function WITH arguments

**Callmethod** - TemplateTag to call a method on an object with arguments from within a template {% callmethod hotel.room_price_for_night night_date="2018-01-02" room_type=room_type_context_var %} ## equals ## >>> hotel.room_price_for_night(night_date="2018-01-02", room_type="standard") #Assuming "standard" is the value of room_type_context_var Django doesn't allow calling a method with arguments in the template to ensure good separation of design and code logic. However, sometimes you will be in situations where it is more maintainable to pass an argument to a method in the template than build an iterable (with the values already resolved) in a view. Furthermore, Django doesn't strictly follow its own ideology: the {% url "url:scheme" arg, kwarg=var %} templatetag readily accepts variables as parameters!! This template tag allows you to call a method on an object, with the specified arguments. Usage: {% callmethod object_var.method_name "arg1_is_a_string" arg2_is_a_var kwarg1="a string" kwarg2=another_contect_variable %} e.g. {% callmethod hotel.room_price_for_night date="2018-01-02" room_type="standard" %} {% callmethod hotel.get_booking_tsandcs "standard" %} NB: If for whatever reason you've ended up with a template context variable with the same name as the method you want to call on your object, you will need to force the template tag to regard that method as a string by putting it in quotes: {# Ensure we call hotel.room_price_for_night() even though there's a template var called {{ room_price_for_night }}! #} {% callmethod hotel."room_price_for_night" date="2018-01-02" room_type="standard" %} * **@author:** Dr Michael J T Brooks * **@version:** 2018-01-05 * **@copyright:** Onley Group 2018 (Onley Technical Consulting Ltd) [http://www.onleygroup.com](http://www.onleygroup.com) * **@license:** MIT (use as you wish, AS IS, no warranty on performance, no liability for losses, please retain the notice) * **@write_code_GET_PAID:** Want to work from home as a Django developer? Earn £30-£50 per hour ($40-$70) depending on experience for helping Onley Group develop its clients' Django-based web apps. E-mail your CV and some sample portfolio code to: [email protected] Copyright 2018 Onley Group Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice, credits, and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

  • template
  • tag
  • templatetag
  • function
  • template-tag
  • args
  • kwargs
  • methods
  • argument
  • template-arguments
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Do Not Escape Characters When Using dumpdata Command (Tested in Django 1.11)

Adds `--pretty` option to django `./manage.py dumpdata` command, which produces pretty utf-8 strings instead of ugly unicode-escaped s**t: > $ ./manage.py dumpdata app.pricingplan --indent=1 <pre> <code>[ { "pk": 1, "model": "app.pricingplan", "fields": { "name": "\u0411\u0430\u0437\u043e\u0432\u044b\u0439", } }, { "pk": 2, "model": "app.pricingplan", "fields": { "name": "\u0425\u0443\u044f\u0437\u043e\u0432\u044b\u0439", } } ] </code> </pre> > ./manage.py dumpdata app.pricingplan --indent=1 --pretty <pre> <code>[ { "pk": 1, "model": "app.pricingplan", "fields": { "name": "Базовый", } }, { "pk": 2, "model": "app.pricingplan", "fields": { "name": "Хуязовый", } } ] </code> </pre> Forked from an [old versions snippet](https://djangosnippets.org/snippets/2258/)

  • pretty
  • dumpdata
  • pretty-print
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Reset Postgres Sequences On Every Migrate

If you create alot of data via fixtures or by inserting the pk you will more than likely see alot of issues with the sequences being out in postgres when creating new records. Similar to: Foo with the pk(x) already exists This you have to fix by updating the postgres sequences to start at the correct number. The below will ensure after every migrate all sequences in predefined apps get reset.

  • postgres
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Login Required Middleware with Next Parameter

Based on [onecreativenerd](http://djangosnippets.org/users/onecreativenerd/) code. Sometimes it's a real pain to use the @login_required decorator all over the views of a complicated site. This middleware requires login on every page by default and supports a list of regular expression to figure out the exceptions. This way you don't have to worry about forgetting to decorate a view. This snippet requires LOGIN_URL to be set in settings.py, and optionally allows you fill out LOGIN_EXEMPT_URLS, a tuple of regular expressions (similar to urls.py) that lists your exceptions. Example: LOGIN_EXEMPT_URLS = ( r'^about\.html$', r'^legal/', # allow the entire /legal/* subsection )

  • middleware
  • django
  • login
  • login_required
  • next
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Generic CBV Permissions Helper

A permission helper that can be included in any generic CBV, it uses the model attribute of the class to load all the permissions and tests a user can perform that action before dispatching the view.

  • permissions
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Dynamically create Django admin actions

With this snippet, I made a set of admin actions for assigning `Quality` objects to `Package` objects. The Django docs for [ModelAdmin.get_actions][1] explain the dictionary of tuples that is returned. [1]: http://docs.djangoproject.com/en/1.1/ref/contrib/admin/actions/#django.contrib.admin.ModelAdmin.get_actions

  • admin
  • admin-actions
  • closures
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AvaliabilityAtDateListFilter

If your model have two dates, start and end of something, you may want to have filter which allow you to show objects which last on specific day.

  • filter
  • admin
  • changelist
  • list_filter
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CBV decorator from view function decorator

The Mixin approach for applying permissions to CBV views suffers from 3 issues: 1. you need to read the code to see what permissions are being applied to a View 2. multiple bits of disparate code required to specify, e.g., a simple permission check 3. permissions set on a base class are overridden by permission set on sub-class, unless special care is taken Here's a nice trick, using only built-in django machinery, apply a decorator intended to decorate a django view function to a CBV view. https://docs.djangoproject.com/en/1.11/topics/class-based-views/intro/#decorating-the-class This approach works for any function decorators with arguments - simply wrap it in a function that takes the same arguments: def my_cbv_decorator(*args **kwargs): return method_decorator(a_view_function_decorator(*args, **kwargs), name='dispatch') Use your new CBV decorator to decorate View sub-classes: @my_cbv_decorator('some_parameter') class MyCBView(django.views.generic.TemplateView): pass # dispatch method for this view is now wrapped by a_view_function_decorator Note: you can also pass decorator parameter directly to method_decorator, but wrapping it up like this makes the code read nicer.

  • view
  • decorator
  • permissions
  • cbv
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Smart Spaceless

This 'smart_spaceless' template tag is a replacement for Django's built-in 'spaceless'. If settings.DEBUG = True, spaces will not be removed to make debugging your template code easier. When DEBUG = False, spaces will be removed. Happy coding!

  • template
  • spaceless
  • template tag
  • remove spaces
  • template tags
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Convert tab indented string to dictionary

output: ``` {u'Ogrenci': [u'Tum okullar', u'Lisans', u'Onlisans', u'Yuksek Lisans / Doktora', u'Ingilizce Hazirlik'], u'Ogretim Elemani': [u'Tum okullar', u'Lisans', u'Onlisans', u'Yuksek Lisans / Doktora', u'Ingilizce Hazirlik']} ```

  • python
  • tab
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Facebook Authentication Backend

Authentication through Facebook's Graph API. See [http://developers.facebook.com/docs/authentication/](http://developers.facebook.com/docs/authentication/) [http://developers.facebook.com/docs/authentication/permissions](http://developers.facebook.com/docs/authentication/permissions) [http://developers.facebook.com/docs/api](http://developers.facebook.com/docs/api) [http://github.com/facebook/python-sdk/blob/master/examples/oauth/facebookoauth.py](http://github.com/facebook/python-sdk/blob/master/examples/oauth/facebookoauth.py) Define the facebook tokens in settings.py and replace <app_name> with the name of your app. You will probably want to modify the scope on the authorize link in the template, see the authentication permissions link. This updates the user model every time the user logs in but I think that it is okay so the data is always correct. I have tested this but not rigorously. If there is a hole and everyone gets admin rights to your site don't say I didn't warn you :). Comments are appreciated. 16 June 2010 Added missing imports. Cleaned up the template. Shouts out to @obeattie and @whalesalad

  • graph
  • authentication
  • login
  • auth
  • facebook
  • oauth
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Automigrate, autocreatesuperuser if not User.count() in runserver and use manage.py:main as entrypoint

With this awesome manage.py, it will try to migrate first when called with runserver. Also, this manege.py has super power to be used in your entry point as such: entry_points = { 'console_scripts': [ # u haz a setup.py -> u haz importable module :) 'yourcommand = yourproject.manage:main', ], }, Example output: $ yourcommand runserver Operations to perform: Apply all migrations: auth, contenttypes, admin, sessions Running migrations: Rendering model states... DONE Applying contenttypes.0001_initial... OK Applying auth.0001_initial... OK Applying admin.0001_initial... OK Applying admin.0002_logentry_remove_auto_add... OK Applying contenttypes.0002_remove_content_type_name... OK Applying auth.0002_alter_permission_name_max_length... OK Applying auth.0003_alter_user_email_max_length... OK Applying auth.0004_alter_user_username_opts... OK Applying auth.0005_alter_user_last_login_null... OK Applying auth.0006_require_contenttypes_0002... OK Applying auth.0007_alter_validators_add_error_messages... OK Applying sessions.0001_initial... OK Operations to perform: Apply all migrations: admin, auth, contenttypes, sessions Running migrations: No migrations to apply. Performing system checks... Username (leave blank to use 'jpic'): Email address: [email protected] Password: Password (again): Superuser created successfully. Welcome in 2017, where automation is king System check identified no issues (0 silenced). September 17, 2017 - 21:21:41 Django version 1.9.10, using settings 'crudlfap_example.settings' Starting development server at http://127.0.0.1:8000/ Quit the server with CONTROL-C. Extra note: it doesn't matter if migrate crashes for now, since django runserver doesn't support not being able to connect to database. So most of the time I hope to shouldn't need to disable this hack.

  • django
  • manage
  • managepy
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