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  • blog-category-djagno
  • blog-category-python
  • blog-category-mongodb
  • blog-categorya-ws

Django Generic many to many field implementation

Django application has a GM2MField that combines the features of the standard Django "ManyToManyField" and "GenericForeignKey".

Installation:
pip install django-gm2m


Daemonizing any command with SUPERVISOR

Daemonizing a command means to make it run as a background process.

so when we have a command that we want to daemonize there are many ways to do it, most common methods are:

1. using upstart
2. adding it to /etc/rc.local
3. creating a script in /etc/init.d and adding them to runlevel folders manually (i.e. incase you want to start, stop a command)


Django Subdomains to do advanced things

We always struggle to give users customization's even before they login to the system like abc.micropyramid.com and django don't know how to handle that out of the box.

We can do it by writing simple middle ware. Django Middle ware have access to request and responses, so, we can get hold on to request and pass it on to django views for further process. Here we will add new property to request and can render pages by seeing at the subdomain property.


Using Django's built in signals and writing custom signals.

Django has a beautiful feature of signals which will record all the actions performed on particular model. In the current blog post we’ll learn how to use django’s built in signals and how to create custom signal.

Django has lot of built in signals like pre_save, post_save, pre_delete and post_delete and etc. Now we’ll learn how to use django’s pre_delete signal with a simple example. In the way we use pre_delete in the present blog post we can use other signals also in the same way.


Publishing Python Modules with PIP via PyPi

We'll install so many packages in our day to day python development. Now in this blog post, we'll try to know how to create our own python module installable with PIP. PyPI is the default Package Index for the Python community. In this post will explain about how to develop and publish python packages to make those available to every one with develop pip install python packages.


Django Custom Management Command

In Django project, We could manage by executing some commands which could be invoked through the manage.py.

For example:
# Sync database
python manage.py syncdb

# Start the webserver
python manage.py runserver


Understanding 'GenericForeignKey' in Django

In some cases the we might want to store generic model object, rather a particular specific model as 'ForeignKey'. Generic model object means adding a foreign key from one of your own models to ContentType allows your model to effectively tie itself to another model class


Basics of Django messages framework

In any web application we need to display notification messages to the end user after processing a form or some other types of his requests. To make this messaging system simple, django provided full support to cookie and session based messaging for both anonymous and authenticated users.

This messages framework is capable of storing messages in one request and retrieving those messages in the subsequent request. Every message has a tag based on its priority(info,warning and error).


Understanding Django's model fromsets in detail and their advanced usage.

Silmilar to the regular formsets, django also provide model formset that make it easy to work with django models. Django model formsets provide a way to edit or create multiple model instances within a single form. Model Formsets are created by factory method. The default factory method is modelformset_factory(). It wraps formset factory to model forms.


Django Raw Sql Queries

When your model query API don't go well or you want more performance, you can use raw sql queries in django. The Django Object Relational Mapper (ORM) helps bridge the gap between the database and our code Performing raw queries.


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