Adding and updating ListField with Mongoengine -

using mongoengine , trying form tag cloud. each item attach 1 or more tags. similar tags used here (below each question asked).

after searching , reading many posts here, still can't proper way of adding new entries listfield, or how replace them.

class item(document):     tags = listfield(stringfield(max_length=300))

i'm trying push 1 or more new tags, using form , gather posted results. in views.py have following check:

if 'tags' in request.post , request.post['tags'] <> '':    tag in request.post.getlist('tags'):        itemdata.update(push__tags__s__tags=tag)

when trying push it, fails:

validationerror (profile:5185505b73ea128e878f4e82) (only lists , tuples may used in list field: ['tags'])

obviously i'm using wrong type, i'm lost on how 1 solved. strange thing reason data appended record though.. (posted "test" , refreshed browser)

"tags" : [ "test", "test" ] }

can 1 show me small example how deal posted string (from html form) , push listfield (and how replace them all).

thanks!

you don't need positional operator $ equates __s__ in mongoengine aren't replacing / updating position in list.

as don't want repeat tags, should use $addtoset. can in mongoengine so:

itemdata.update(add_to_set__tags=['tag1', 'tag2'])

passing in list add_to_set automatically convert $addtoset $each.

Three