forms.py 文件源码

def clean(self):
        cleaned_data = super(TeamInvitationForm, self).clean()
        email = cleaned_data.get("email")

        if email is None:
            raise forms.ValidationError("valid email address required")

        try:
            user = User.objects.get(email=email)
        except User.DoesNotExist:
            # eventually we can invite them but for now assume they are
            # already on the site
            raise forms.ValidationError(mark_safe("no account with email address <b>%s</b> found on this conference site" % escape(email)))

        state = self.team.get_state_for_user(user)

        if state in ["member", "manager"]:
            raise forms.ValidationError("user already in team")

        if state in ["invited"]:
            raise forms.ValidationError("user already invited to team")

        self.user = user
        self.state = state

        return cleaned_data