--------------------------------------------MODELS.PY--------------------------------------------
class Artist(models.Model):name = models.CharField("artist", max_length=50) #will display "artist" in front of artist-nameyear_formed = models.PositiveIntegerField()# Initialization Example
# newArtist = Artist(name = 'Artist Name', year_formed = 2015);
# newArtist.save();# Album will be a foreign key
# Many to 1 relation ie (Single artist -> many albums)
class Album(models.Model):name = models.CharField("album", max_length=50) #will display "album" in front of album-nameartist = models.ForeignKey(Artist)
-----------------------------SHELL--------------------------------
newArtist = Artist(name = 'GBA',year_formed = 1990)
newArtist.save()
album1 = Album(name = 'a',artist = newArtist)
album2 = Album(name = 'b',artist = newArtist)
album3 = Album(name = 'c',artist = newArtist)
album1.save()
album2.save()
album3.save()
allAlbums = Album.objects.all()for e in allAlbums:print(e.artist.name)
--------------------#Results in error-------------------------
Traceback (most recent call last):File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py", line 170, in __get__rel_obj = getattr(instance, self.cache_name)
AttributeError: 'Album' object has no attribute '_artist_cache'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):File "<input>", line 2, in <module>File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py", line 179, in __get__rel_obj = qs.get()File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/query.py", line 385, in getself.model._meta.object_name
DB_start.models.DoesNotExist: Artist matching query does not exist.
I am following the correct syntax as documentation yet results in error. How can I successfully access the foreign key fields? Have tried print (e__name) as well.