TangoWithDjango Population Script does not work as expected - django

Question

When I run python populate_rango.py it gives this
Starting Rango population script...
- Python - Page object
- Python - Page object
- Python - Page object
- Django - Page object
- Django - Page object
- Django - Page object
- Other Frameworks - Page object
- Other Frameworks - Page object
Why it does not read the titles correctly like this?
Starting Rango population script...
- Python - Official Python Tutorial
- Python - How to Think like a Computer Scientist
- Python - Learn Python in 10 Minutes
- Django - Official Django Tutorial
- Django - Django Rocks
- Django - How to Tango with Django
- Other Frameworks - Bottle
- Other Frameworks - Flask
So it does not work. my populate_rango.py is:
import os
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'sarpedon33.settings')
import django
django.setup()
from rango.models import Category, Page
def populate():
python_cat = add_cat('Python')
add_page(cat=python_cat,
title="Official Python Tutorial",
url="http://docs.python.org/2/tutorial/")
add_page(cat=python_cat,
title="How to Think like a Computer Scientist",
url="http://www.greenteapress.com/thinkpython/")
add_page(cat=python_cat,
title="Learn Python in 10 Minutes",
url="http://www.korokithakis.net/tutorials/python/")
django_cat = add_cat("Django")
add_page(cat=django_cat,
title="Official Django Tutorial",
url="https://docs.djangoproject.com/en/1.5/intro/tutorial01/")
add_page(cat=django_cat,
title="Django Rocks",
url="http://www.djangorocks.com/")
add_page(cat=django_cat,
title="How to Tango with Django",
url="http://www.tangowithdjango.com/")
frame_cat = add_cat("Other Frameworks")
add_page(cat=frame_cat,
title="Bottle",
url="http://bottlepy.org/docs/dev/")
add_page(cat=frame_cat,
title="Flask",
url="http://flask.pocoo.org")
# Print out what we have added to the user.
for c in Category.objects.all():
for p in Page.objects.filter(category=c):
print "- {0} - {1}".format(str(c), str(p))
def add_page(cat, title, url, views=0):
p = Page.objects.get_or_create(category=cat, title=title)[0]
p.url=url
p.views=views
p.save()
return p
def add_cat(name):
c = Category.objects.get_or_create(name=name)[0]
return c
# Start execution here!
if __name__ == '__main__':
print "Starting Rango population script..."
populate()
my project folder name is sarpedon33 that is why it is like that.
Models:
from django.db import models
# Create your models here.
class Category(models.Model):
name = models.CharField(max_length=128, unique=True)
def __unicode__(self): #For Python 2, use __str__ on Python 3
return self.name
class Page(models.Model):
category = models.ForeignKey(Category)
title = models.CharField(max_length=128)
url = models.URLField()
views = models.IntegerField(default=0)
def __unicode__(self):
return self.name
class Ox(models.Model):
horn_length = models.IntegerField()
class Meta:
ordering = ["horn_length"]
verbose_name_plural = "categories"
def __unicode__(self): #For Python 2, use __str__ on Python 3
return self.title
Ok I have added Page Model however this time I get AttributeError: 'Page' object has no attribute 'name'.
Here is my settings.py :
import os
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
STATIC_PATH = os.path.join(BASE_DIR,'static')
STATIC_URL = '/static/' # You may find this is already defined as such.
STATICFILES_DIRS = (STATIC_PATH,)
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media') # Absolute path to the media directory
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = '&9(_icx1*u8l0ulfa_vx1d0=oq9%*1jjw-1zl3t8b20_)5-nny'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = (
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rango'
)
MIDDLEWARE_CLASSES = (
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware',
)
ROOT_URLCONF = 'sarpedon33.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(BASE_DIR, 'templates')],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'sarpedon33.wsgi.application'
# Database
# https://docs.djangoproject.com/en/1.8/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
}
}
# Internationalization
# https://docs.djangoproject.com/en/1.8/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.8/howto/static-files/
STATIC_URL = '/static/'

Answer 1

Your models most likely lack the
def __unicode__(self):
return self.name
functions. When printing it calls these functions, which you override in the models. Refer to 5.3. Creating Models in http://www.tangowithdjango.com/book/chapters/models.html.

Answer 2

As the error message says, the Page model does not have an attribute called name, but you are trying to access it in the __unicode__ method. Change the method definition like this:
def __unicode__(self):
return self.title