[英]Django ValueError - add user to userteam
我正在創建一個Django表單,您可以在其中將用戶添加到UserTeam(下面的UserTeams模型)。 “邀請”頁面(如下)查詢團隊模型以獲取當前團隊的ID,然后將其分配給“團隊ID”,因此您只能將用戶添加到當前團隊中。 (我已禁用此字段,因此用戶無法更改團隊。)然后,用戶選擇要添加的用戶,然后提交表單。 我正在嘗試使用“ Kate FC”團隊,並添加玩家“ steven”。 但是,當我提交表單時,出現此錯誤:
位於/ teams / 1 / invite /的ValueError
無法分配“'Kate FC'”:“ UserTeams.teamID”必須是“ Team”實例。
這個錯誤是什么意思??
class UserTeams(models.Model):
userID = models.ForeignKey(User,on_delete=models.CASCADE)
teamID = models.ForeignKey(Team,on_delete=models.CASCADE)
class Team(models.Model):
name = models.CharField(max_length=100)
venue = models.CharField(max_length=100)
countryID = models.ForeignKey(Countries, on_delete=models.CASCADE)
owner = models.ForeignKey(User)
def invite(request, teamID):
try:
query = Team.objects.get(id=teamID)
except:
raise Http404()
if request.method == 'POST':
form = InvitePlayerForm(request.POST or None, initial={'teamID': query})
if form.is_valid():
userteam = form.save(commit=False)
userteam.save()
return redirect('teammanager/teams.html')
else:
form = InvitePlayerForm(initial={'teamID': query})
query = Team.objects.get(id=teamID)
return render(request, 'teammanager/invite.html', {
"team": query,
"form": form
})
表格:
class InvitePlayerForm(forms.ModelForm):
teamID = forms.CharField(disabled=True)
class Meta:
model = UserTeams
fields = ['teamID','userID']
teamID
是一個外鍵,因此您應該使用模型選擇字段而不是CharField:
class InvitePlayerForm(forms.ModelForm):
teamID = forms.ModelChoiceField(queryset=Team.objects.all(), disabled=True)
...
或者您可以在__init__
方法中禁用該字段。
class InvitePlayerForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(InvitePlayerForm, self).__init__(*args, **kwargs)
self.fields['teamID'].disabled = True
...
或者,您可以將teamID
字段保留在teamID
之外,並在保存表單時設置值:
if form.is_valid():
userteam = form.save(commit=False)
userteam.teamID = query
userteam.save()
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