def save(self):
if self.instance:#update
photo=self.instance
old_txt_tags_set=txt2set(photo.get_txt_tags())
to_remove_tags_set=old_txt_tags_set-self.d_txt_tags_set
to_add_tags_set=self.d_txt_tags_set-old_txt_tags_set
photo.add_txt_tags(to_add_tags_set)
photo.remove_txt_tags(to_remove_tags_set)
from datetime import datetime
photo.modification_date=datetime.now()
else:
photo = Photo()
#上传图片
photo.user=self.user
filename=upload_photo(self.cleaned_data['photo'],
self.cleaned_data['photo'].name.split('.')[-1])
photo.photo_url=filename
photo.title=self.cleaned_data['title']
from oldphoto.utils.textconvert import plaintext2html
photo.descn=plaintext2html(self.cleaned_data['descn'])
#处理tags，删除删除的tag，添加新增加的tags
photo.txt_tags=self.cleaned_data['txt_tags']
photo.save()
if not self.instance:#update
photo.add_txt_tags(self.d_txt_tags_set)
photo.save()
return photo
def clean_txt_tags(self):
self.d_txt_tags_set=txt2set(self.cleaned_data['txt_tags'])
if len(self.d_txt_tags_set)==0:
raise forms.ValidationError(_('tags不能为空'))
return ' '.join(self.d_txt_tags_set)
def txt_tag_set(self):
return txt2set(self.txt_tags)