Django: Web Development with Python

Advanced usage of models

We studied the basics of the models that allow us to create simple applications. Sometimes, it is necessary to define more complex structures.

Using two relationships for the same model

Sometimes, it is useful to store two foreign keys (or more) in a single model. For example, if we want two developers to work in parallel on the same task, we must use the related_name property in our models. For example, our Task model contains two relationships with the following lines:

developer1 = models.ForeignKey (Developer , verbose_name = "User" , related_name = "dev1" )
developer2 = models.ForeignKey (Developer , verbose_name = "User" , related_name = "dev2" )

Further in this book, we will not use these two relationships. To effectively ...