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.
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.
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
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).
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.
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.
Using Facebook integration, we can get the user verified email id, general information, friends, pages, groups and you can post on his profile, facebook pages, groups with out user entering a details in a less span of time.
Django model is the single, definitive source of data about your data. It contains the essential fields and behaviors of the data you’re storing. Generally, each model maps to a single database table. And an instance of that class represents a particular record in the database table. Django Manager is the interface through which database query operations are provided to Django models.By default, Django adds a Manager with the name "objects" to every Django model class.