How to add a filter function in couchdb with python?

Question

I know i can use couchdb.ViewDefinition to create a view for a database.Is there something similar to create a changes filter function or I can just create a design document with the filters field?

Kxepal · Accepted Answer · 2013-04-10 05:20:31Z

2

Currently there is no such what unless you'll operate with design documents as regular onces e.g. dumping python function to source code and assigning it to ddoc filters field.

You may try to apply patch from issue 186: it provides support of definition show/list/update/filter/validate_doc_update functions in manner like views currently does.

For instance:

from couchdb import design, mapping

class Post(mapping.Document):

   by_author = design.FilterFunction('posts', 'by_name', '''
function(doc, req){
  if (req.query.author){
    return doc.author === req.query.author;
  }
  throw({'invalid_query': 'author name was not specified'});
}
''')

if __name__ == '__main__:
    design.sync_docs(db, [Post])

Feedback and bugs are welcomed (:

answered Apr 10, 2013 at 5:20

Kxepal

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2 Comments

vkefallinos Over a year ago

I am using couchdb on a production server.Do you think it is stable enough to use it or should I use the regular way of creating documents?

Kxepal Over a year ago

Not sure so I'd like to suggest you test it first before applying in production environment. For stable solution better to work with ddocs as with regular docs or even switch to couchapp or erica tool for working with ddocs.

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