在将表单数据提交到数据库之前，请在View Django中更改一些字段数据

Question

嗨，我的表单是这样的，当我提交它时，它转到我附加的视图，我想更改例如在提交之前在名称字段中的字符串之间添加破折号。那么在我看来，我该如何做到这一点呢？

形式.html

name = models.CharField(max_length=255, help_text='The name of this map.')
subtitle = models.CharField(max_length=255, null=True, blank=True,
help_text='If(unbolded)')

当我提交时，它会转到那个观点

View.py

def save_form_if_appropriate(self, attr):
if self.request.method == 'POST':
if self.site_acl >= self.acl.ADMIN or self.is_modifying_self(attr):
if self.form.is_valid():
if attr == 'user':
obj = self.form.save(commit=False)
# this way we can keep record of the users creator.
obj.parent_id = self.request.user
if hasattr(obj, 'user_type') and obj.user_type != 'pro':
obj.sub_users_allowed = 0
obj.save()
else:
self.form.save()
messages.success(self.request, 'Thing saved.')
return True
else:
messages.warning(self.request, self.form.errors)
# messages.warning(self.request, 'Thing was invalid, and couldn't be saved.')
else:
messages.warning(self.request, 'You dont have permission to save that thing.')
return False

Answer 1

def save_form_if_appropriate(self, attr):
if not self.request.method == 'POST':
return False
if not (self.site_acl >= self.acl.ADMIN or self.is_modifying_self(attr)):
messages.warning(self.request, 'You dont have permission to save that thing.')
return False
if not self.form.is_valid():
messages.warning(self.request, self.form.errors)
return False
obj = self.form.save(commit=False)
if attr == 'user':
# this way we can keep record of the users creator.
obj.parent_id = self.request.user
if hasattr(obj, 'user_type') and obj.user_type != 'pro':
obj.sub_users_allowed = 0
# Here you can do whatever you want on the object
# For example joining string in names
obj.name = '-'.join(obj.name.split(' '))
obj.save()
messages.success(self.request, 'Thing saved.')
return True