我有一个 ModelForm ( EditGoalForm
),我用它来编辑模型 ( Goal
) 的实例。在保存表单数据之前必须满足一些条件。我使用 if 语句来检查这些条件,它仍然保存,而不是给出错误 - 就像 if 语句什么都不做。
我有以下内容:
models.py
class Goal(models.Model):
goal_name = models.CharField(max_length=250)
goal_status = models.ForeignKey(GoalStatus, on_delete=models.CASCADE, related_name='goal_status')
user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='scrumy_goal_user')
class GoalStatus(models.Model):
status_name = models.CharField(max_length=250)
forms.py
class EditGoalForm(forms.ModelForm):
goal_status = forms.ModelChoiceField(queryset=GoalStatus.objects.all(), empty_label="Select Goal Status")
class Meta:
model = Goal
fields = ('goal_status',)
views.py
def move_goal(request, goal_id):
goal_instance = Goal.objects.get(goal_id=goal_id)
ERROR_MESSAGE = '''BlahBlahBlah'''
has_perm_cannot_move_to_done = request.user.has_perm('application.cannot_move_to_done')
has_perm_can_move_goal_anywhere = request.user.has_perm('application.can_move_goal_anywhere')
has_perm_can_move_someones_goal_from_verify_to_done = request.user.has_perm('application.can_move_someones_goal_from_verify_to_done')
has_perm_can_move_anybodys_goal_to_any_column = request.user.has_perm('application.can_move_anybodys_goal_to_any_column')
if request.method == 'POST':
form = EditGoalForm(request.POST, instance=goal_instance)
if form.is_valid():
if (has_perm_cannot_move_to_done and form.cleaned_data['goal_status'] != 'Done Goal'):
form.save()
messages.success(request, 'Goal Update Successful')
return redirect('home')
else:
messages.error(request, ERROR_MESSAGE)
else:
form = EditGoalForm(instance=goal_instance)
return render(request, 'move_goal.html', {'form': form})
之后if form.is_valid
,我检查了经过身份验证的用户是否具有权限以及该goal_status
字段是否未设置为Done Goal
. 如果两者都为真,则保存。但是,如果我将该goal_status
字段设置为Done Goal
,它仍然会保存而不是显示错误消息。有什么问题?