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Inheritance: Extending Model Classes in a sub-file

To add on additional methods to a model class, you need to set proxy=True:

from apps.main.models import Catalog

 class CatalogMasterTitleCreation(Catalog):
     class Meta:
        proxy = True
    def print_hello(self):
        print 'hello!!'

Categories : Python

Related to : Inheritance: Extending Model Classes in a sub-file
Multiple inheritance with Qt classes
You can use QGraphicsObject instead of QGraphicsItem, which provides the required signals / slots mechanism for you, without the need for multiple inheritance. You also mention in your comment:- [inheriting] Line from QgraphicsLineItem and Text from QgraphicsTextItem Rather than extending QGraphicsLineItem and QGraphicsTextItem, it would be better if you inherit from QGraphicsItem or QGrap

Categories : C++
Extending Magento Model Not Working
Your config.xml is not set properly. Magento is case sensitive in reading the xml files. So your config.xml file should be like this, <?xml version="1.0"?> <config> <modules> <KNG_M2eProMods> <version>0.1.0</version> </KNG_M2eProMods> </modules> <global> <models> <m2epromods> <class>KNG_

Categories : PHP
how does inheritance work with abstract classes in java
Just change private to protected. private means that your subclasses don't have access to variables or methods, whereas protected allows this access.

Categories : Java
Child classes not saved in database in ASP.Net MVC Identity Model
I suspect UserManager.Create() is expecting an ApplicationUser object rather than a Person and, as such, just treats it as a ApplicationUser. You should just add your application-specific properties to the ApplicationUser class rather than inheriting from it. A tutorial describing the process is here In a nutshell you simply need to add properties inside this class definition in the /Models/iden

Categories : C#
Where do constructors go for classes that extend or implement other classes
There's no change to the constructor required. What is required is that you implement the methods prescribed by the interface. That is to say, you could have the same constructor you're using (provided that you provide types for your parameters, which you are not, but you must), but you are required to implement compareTo(Student other) somewhere in your class.

Categories : Java
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