Printing Objects in Django

Question

So I\'ve connected Django to a pre-existing database successfully (inspect, validate and sync) and I\'ve created an app and a project and all that (I\'m reading the Django b

Answer 1

UPDATE: In Python 3.x, use __str__ instead of __unicode__

What you are seeing is a list of Artist model instances. Your values are in a python object. If you would like to make the representation of those instances more helpful, you should define the __unicode__ method for them to print something useful:

https://docs.djangoproject.com/en/dev/ref/models/instances/?from=olddocs#unicode

Its not a placeholder, its the actual object's representation, converted to unicode.

Answer 2

Django uses an ORM (Object-Relational Mapper) that translates data back and forth between Python objects and database rows. So when you use it to get an item from the database, it converts it into a Python object.

If that object doesn't define how to display itself as text, Django does it for you. Python does the same thing:

>>> class MyObject(object):
...     pass
... 
>>> [MyObject(), MyObject()]
[<__main__.MyObject object at 0x0480E650>,
 <__main__.MyObject object at 0x0480E350>]

---

If you want to see all of the actual values for the row for each object, use values.

Here is the example from the docs:

# This list contains a Blog object.
>>> Blog.objects.filter(name__startswith='Beatles')
[<Blog: Beatles Blog>]

# This list contains a dictionary.
>>> Blog.objects.filter(name__startswith='Beatles').values()
[{'id': 1, 'name': 'Beatles Blog', 'tagline': 'All the latest Beatles news.'}]

Answer 3

if you want to use print method ovveride the unicode method in the model itself

 def __unicode__(self):
    return u'%s' % (self.id)

here an example model

class unit(models.Model):
id = models.AutoField(primary_key=True)
name = models.CharField(max_length=255)
def __unicode__(self):
    return u'%s' % (self.name)

print(unit.objects.all())
[unit: KG, unit: PCs]