Django syncdb - NameError: name '*********' is not defined - django

Question

I am new to Django & Python and have been following a tutorial, but I have an error that has me stumped.
I am attempting to build my django models / database.
When I attempt to run python manage.py syncdb I receive the following error in my command line prompt:
C:\Users\6233114\Django-Projects\GlobalX>python manage.py syncdb
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line
443, in execute_from_command_line
utility.execute()
File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line
382, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Python27\lib\site-packages\django\core\management\base.py", line 196,
in run_from_argv
self.execute(*args, **options.__dict__)
File "C:\Python27\lib\site-packages\django\core\management\base.py", line 231,
in execute
self.validate()
File "C:\Python27\lib\site-packages\django\core\management\base.py", line 266,
in validate
num_errors = get_validation_errors(s, app)
File "C:\Python27\lib\site-packages\django\core\management\validation.py", lin
e 30, in get_validation_errors
for (app_name, error) in get_app_errors().items():
File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 158, in
get_app_errors
self._populate()
File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 64, in
_populate
self.load_app(app_name, True)
File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 88, in
load_app
models = import_module('.models', app_name)
File "C:\Python27\lib\site-packages\django\utils\importlib.py", line 35, in im
port_module
__import__(name)
File "C:\Users\6233114\Django-Projects\GlobalX\app_data\models.py", line 15, i
n <module>
class LanguageCode(models.Model):
File "C:\Users\6233114\Django-Projects\GlobalX\app_data\models.py", line 27, i
n LanguageCode
languageDirectionID = models.ForeignKey(languageDirection, default=1, db_col
umn="languageDirectionID")
NameError: name 'languageDirection' is not defined
C:\Users\6233114\Django-Projects\GlobalX>
This is a cut down version of my models.py file (lines 1 - 29):
from django.db import models
from django.contrib.auth.models import User
class LanguageDirection(models.Model):
languageDirectionID = models.AutoField(primary_key=True, db_column="languageDirectionID")
languageDirectionDescription = models.CharField(max_length=20, db_column="languageDirectionDescription")
languageDirDescription = models.CharField(max_length=20, db_column="languageDirDescription")
textAlign = models.CharField(max_length=20, db_column="textAlign")
oppositeLanguageDirectionDescription = models.CharField(max_length=20, db_column="oppositeLanguageDirectionDescription")
oppositeLanguageDirDescription = models.CharField(max_length=20, db_column="oppositeLanguageDirDescription")
oppositeTextAlign = models.CharField(max_length=20, db_column="oppositeTextAlign")
class Meta:
db_table="languageDirection"
class LanguageCode(models.Model):
languagecodeID = models.AutoField(primary_key=True, db_column="languageCodeID")
languageCodeDescription = models.CharField(max_length=10, db_column="languageCodeDescription")
baseLanguageCode = models.CharField(max_length=10, db_column="baseLanguageCode")
languageNameEng = models.CharField(max_length=255, db_column="languageNameEng")
altLanguageNameEng = models.CharField(max_length=255, blank=True, null=True, db_column="altLanguageNameEng")
languageNameNative = models.CharField(max_length=255, db_column="languageNameNative")
altLanguageNameNative = models.CharField(max_length=255, blank=True, null=True, db_column="altLanguageNameNative")
iso639_1 = models.CharField(max_length=10, blank=True, null=True, db_column="iso639_1")
iso639_2T = models.CharField(max_length=10, db_column="iso639_2T")
iso639_2B = models.CharField(max_length=10, db_column="iso639_2B")
iso639_X = models.CharField(max_length=10, db_column="iso639_X")
languageDirectionID = models.ForeignKey(languageDirection, default=1, db_column="languageDirectionID")
class Meta:
db_table="languageCode"
The relationship between LanguageDirection & LangaugeCode is a one-to-many, where LanguageDirection.LanguageDirectionID (one) and LanguageCode.LanguageDirectionID (many).
Any suggestions as to what is causing this error and how I can fix this?

Answer 1

This is the meat of the error:
languageDirectionID = models.ForeignKey(languageDirection, default=1, db_col
umn="languageDirectionID")
NameError: name 'languageDirection' is not defined
The line should be:
languageDirectionID = models.ForeignKey(LanguageDirection, default=1, db_column="languageDirectionID")
Since the ForeignKey takes a class, or the name of a class in quotes such as "LanguageDirection".
NameError, for the future, means you're attempting to use a variable that is either not in scope, or does not exist.

Answer 2

Something that happened to me a few times is that when defining the models in Django, the Foreign key field relates to a model that´s defined further down in the same document.
This gives me no warnings in Pycharm 2.7 which I consider somewhat odd. Anyways, to solve this just put '' around the class name.
models.ForeignKey('SomeModel')

Answer 3

languageDirectionID = models.ForeignKey(languageDirection, default=1, db_column="languageDirectionID") should be languageDirectionID = models.ForeignKey(LanguageDirection, default=1, db_column="languageDirectionID"). The error refers to the issue that languageDirection, which should refer to the class name and not the DB table name for the foreign key target, is not capitalized correctly.