Python Django - models.Model subclass's constructor

Question

I just started to learn Django and relatively new to Python.

I'm trying to understand Django's overview here

from django.db import models

class Reporter(models.Model):
    full_name = models.CharField(max_length=70)

    def __str__(self):              # __unicode__ on Python 2
        return self.full_name

class Article(models.Model):
    pub_date = models.DateField()
    headline = models.CharField(max_length=200)
    content = models.TextField()
    reporter = models.ForeignKey(Reporter)

    def __str__(self):              # __unicode__ on Python 2
        return self.headline

I wonder how could they do something like this:

# Create a new Reporter.
>>> r = Reporter(full_name='John Smith')

and

>>> a = Article(pub_date=date.today(), headline='Django is cool',
...     content='Yeah.', reporter=r)

Can somebody point out where are the constructors defined in the example classes above?

Daniel Roseman · Accepted Answer · 2015-01-04 16:36:21Z

1

Python classes don't need explicit constructors. However, in this case they are constructed by the metaclass, django.db.models.base.BaseModel, which they inherit from models.Model.

answered Jan 4, 2015 at 16:36

Daniel Roseman

602k68 gold badges911 silver badges924 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Python Django - models.Model subclass's constructor

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related