07 Jun, 14

Stop PIP from re-downloading same packages over and over again

PIP has a habit of re-downloading same packages every time you hit pip install package_name. That's not so cool, especially, when you deploy packages from requirements.txt and one of the packages failed to build, restarting pip install -r requirements.txt would lead pip to redownload all the packages again ...

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01 Jun, 14

Cleanup Files (and Images) On Model Delete in Django

In Django, if your model has Filefield / Imagefield, when it's get deleted it doesn't delete attached files by default. To fix that you need to do two steps: 1) Add filecleanup function, that'll take care of deleting files attached to a model:

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20 May, 14

Adding a custom extra field to entity / node display

I had a case recently, where I needed to add custom data to the node display and wanted this data to behave like a field, however the data itself didn't belong to a field. By "behaving like a field" I mean you can that field at node display settings and ...

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29 Apr, 14

Run Multiple Django Apps With Celery On One Server With Rabbitmq VHosts

Very often we can have multiple Django apps each running celery and all this is installed on a single server. How do we isolate these separate app's celery workers? The answer is: Simple, if you use Rabbitmq as your broker. Rabbitmq lets us to add multiple virtualhosts, so we can ...

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25 Apr, 14

ERROR: must be owner of extension plpgsql

Today while moving Django/PostgreSQL site between servers and importing an SQL dump into the new location I got a surprising error "ERROR: must be owner of extension plpgsql". I'm already used to PostgreSQL quirks so after a quick search I came to the following solution: Login as postgres user ...

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23 Mar, 14

Pass request object to the form: CBV and Form Mixins

If you want to access data from request object in your model form these two mixins will help you to do it easily: 1) You'll need a View mixin like this:

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  1. class RequestFormKwargsMixin(object):
  2. """
  3. CBV mixin which puts ...
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23 Mar, 14

Sorting on chardfields in Haystack and Elasticsearch

Current version on Haystack (2.10) combined with Elasticsearch produces weird results when you want to sort search results on charfield, the issue has been reported here https://github.com/toastdriven/django-haystack/issues/866 and here: https://github.com/toastdriven/django-haystack/issues/569 Long story short, to fix the problem ...

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18 Mar, 14

Replacing Menu Item Visibility module with custom "in code" solution

I'm a big fan of fighting with Drupal's inefficiencies and bottlenecks. Most of these come from contrib modules. Everytime we install a contrib module we should be ready for surprises which come on board with the module.

One of the latest examples is Menu item visibility (https://drupal.org/project ...

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06 Mar, 14

Haystack Search Pager

To make haystack search pager place nicelly with other get parameters, we can do something like this: 1) Create a templatetag:

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  1. @register.simple_tag
  2. def get_search_pager_link(request):
  3. params = []
  4. link = '?'
  5. for key, value in request.GET.items():
  6. if key ...
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28 Feb, 14

Django Messages and Bootstrap 3

To make Django messages look nice in your bootstrap 3 template you need two things:

1. Create a custom template tag to define css name for a message:

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  1. @register.assignment_tag
  2. def get_bootstrap_alert_msg_css_name(tags):
  3. return 'danger' if tags == 'error' else tags

2. Add this snippet to your base ...

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