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 template engine comes as part of django framework and its very easy, extensible and handy to develop complex web applications with simplest efforts. Lets see basics of django template engine.
A template is a text document, or a normal Python string, that is marked-up using the Django template language. Template system in Python can be used in the following way:
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.
Python-reCaptcha is a pythonic and well-documented reCAPTCHA client that supports all the features of the remote API to generate and verify CAPTCHA challenges. To add into your django project, you need captcha public, private keys are required.
Python decorators supports aspect-oriented programming. It is used to add or modify code in functions or classes. Using decorators will provide security, tracing, looking ..etc Let see an example:
print "This is my function"
Having a good environment setup is important for effective, fast and easy coding. We have different IDE's like eclipse, pycharm, sublime etc.. which are powerful and easy to use.
IDE's like eclipse, pycharm, sublime etc.. are resource intensive as they run many features, this is not a problem if you have really great system with powerfull resources.
Python Properties is a class for managing class attributes in Python. Property( ) is a built-in function that creates and returns a property object
attribute_name = property(get_Attribute, set_Attribute,del_Attribute(Optional), doc_Attribue(Optional))
where, get_Attritube is function to get value of the attribute,