返回INT（值）ValueError异常：对于int（）与底座10无效字面：“”

Question

我的新djnago.When我即将运行命令

python manage.py migrate

上述的错误是coming.I不知道我错在哪里。 我populate_rango.py文件

import os 
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'tango_with_django_project.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): 
    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,views,likes): 
    c = Category.objects.get_or_create(name=name)[0] 
    c.views=views 
    c.likes=likes 
    c.save() 
    return c 

# Start execution here! 
if __name__ == '__main__': 
    print "Starting Rango population script..." 
    populate() 

误差

Applying rango.0002_auto_20151102_1020...Traceback (most recent call last): 
File "manage.py", line 10, in <module> 
execute_from_command_line(sys.argv) 
File "/usr/local/lib/python2.7/dist-packages/django/core/management /__init__.py", line 351, in execute_from_command_line 
utility.execute() 
File "/usr/local/lib/python2.7/dist-packages/django/core/management/__init__.py", line 343, in execute 
self.fetch_command(subcommand).run_from_argv(self.argv) 
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 394, in run_from_argv 
self.execute(*args, **cmd_options) 
File "/usr/local/lib/python2.7/dist-packages/django/core/management/base.py", line 445, in execute 
output = self.handle(*args, **options) 
File "/usr/local/lib/python2.7/dist-packages/django/core/management/commands/migrate.py", line 222, in handle 
executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial) 
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 110, in migrate 
self.apply_migration(states[migration], migration, fake=fake, fake_initial=fake_initial) 
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/executor.py", line 148, in apply_migration 
state = migration.apply(state, schema_editor) 
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/migration.py", line 115, in apply 
operation.database_forwards(self.app_label, schema_editor, old_state, project_state) 
File "/usr/local/lib/python2.7/dist-packages/django/db/migrations/operations/fields.py", line 62, in database_forwards 
field, 
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/sqlite3/schema.py", line 179, in add_field 
self._remake_table(model, create_fields=[field]) 
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/sqlite3/schema.py", line 77, in _remake_table 
self.effective_default(field) 
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/base/schema.py", line 211, in effective_default 
default = field.get_db_prep_save(default, self.connection) 
File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 710, in get_db_prep_save 
prepared=False) 
File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 702, in get_db_prep_value 
value = self.get_prep_value(value) 
File "/usr/local/lib/python2.7/dist-packages/django/db/models/fields/__init__.py", line 1868, in get_prep_value 
return int(value) 
ValueError: invalid literal for int() with base 10: '' 

0002_auto_20151102_1020文件

from __future__ import unicode_literals 

from django.db import migrations, models 


class Migration(migrations.Migration): 

    dependencies = [ 
     ('rango', '0001_initial'), 
    ] 

    operations = [ 
     migrations.AddField(
      model_name='category', 
      name='likes', 
      field=models.IntegerField(default=1), 
      preserve_default=False, 
     ), 
     migrations.AddField(
      model_name='category', 
      name='views', 
      field=models.IntegerField(default=''), 
      preserve_default=False, 
    ), 
] 

models.py是

from django.db import models 

# Create your models here. 
class Category(models.Model): 
    name = models.CharField(max_length=128, unique=True) 
    views=models.IntegerField() 
    likes=models.IntegerField() 
    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() 

    def __unicode__(self):  #For Python 2, use __str__ on Python 3 
     return self.title 

请帮助me.Thank S代表花费你的时间......

Answer 1

你有

migrations.AddField(
     model_name='category', 
     name='views', 
     field=models.IntegerField(default=''), # <---- problem line 
     preserve_default=False, 
), 

IntegerField需求整数，而不是字符串;）在您的Category模型

，你需要

views = models.IntegerField(default=0) 

，然后运行该命令再次：

makemigrations 
migrate