Django: ValueError exception when assigning one-to-many member variable -
i have 2 django models, team , player, player has many-to-one relationship team:
class team(models.model): name = models.charfield(max_length=20) class player(models.model): name = models.charfield(max_length=20) team = models.foreignkey(team) i have created team object, , saved in sql database:
my_team = team(name = 'django_fc') my_team.save() now, want create player object, my_player, team my_team object created. outside scope of created my_team, must load database in order assign my_player's team. have therefore tried following:
the_team = team.objects.filter(name = 'django_fc') my_player = player(name = 'mr_python', team = the_team) however, following valueerror exception:
cannot assign "[<team: django_fc>]": "player.team" must "team" instance. please can explain doing wrong? thank you.
use get() instead of filter():
the_team = team.objects.get(name='django_fc') quote docs:
filter()givequeryset, if single object matches query - in case, queryset containing single element.if know there 1 object matches query, can use
get()method on manager returns object directly.
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