def remove_tags(self, tags, field, **kw):
tags = sql.to_list(tags)
for r in self.select(**kw):
t_arr = r[field]
if not t_arr:
continue
modified = False
for t in tags:
if t in t_arr:
t_arr.remove(t)
modified = True
if modified:
self.update({field : t_arr},_id=r._id)
def add_tags(self, tags, field, **kw):
tags = sql.to_list(tags)
for r in self.select(**kw):
t_arr = r[field]
if t_arr is None:
t_arr = []
modified = False
for t in tags:
if t not in t_arr:
t_arr.append(t)
modified = True
if modified:
self.update({field : t_arr},_id=r._id)