Managing users in _users with couchdb-python

Question

I'm trying to store and retrieve user from the database _users using couchdb-python. I'm a beginner here with couchdb.

I mapped the python class User with couchdb Document couchdb.mapping.Document like this:

import couchdb.mapping as cmap


class User(cmap.Document):
    name = cmap.TextField()
    password = cmap.TextField()
    type = 'user'
    roles = {}

but this is not working. I got doc.type must be user ServerError so probably the way I'm declaring the type is not correct.

How should I construct my class to be used with the _users database?

rdbisme · Accepted Answer · 2016-03-29 15:00:30Z

After some hints from the #couchdb channel on IRC I came out with this class (that's probably more than I was asking...)

import couchdb.mapping as cmap

class User(cmap.Document):
    """  Class used to map a user document inside the '_users' database to a
    Python object.

    For better understanding check https://wiki.apache.org
        /couchdb/Security_Features_Overview

    Args:
        name: Name of the user
        password: password of the user in plain text
        type: (Must be) 'user'
        roles: Roles for the users

    """

    def __init__(self, **values):
        # For user in the _users database id must be org.couchdb.user:<name>
        # Here we're auto-generating it.
        if 'name' in values:
            _id = 'org.couchdb.user:{}'.format(values['name'])
            cmap.Document.__init__(self, id=_id, **values)

    type = cmap.TextField(default='user')
    name = cmap.TextField()
    password = cmap.TextField()
    roles = cmap.ListField(cmap.TextField())

    @cmap.ViewField.define('users')
    def default(doc):
        if doc['name']:
            yield doc['name'], doc

This should work:

db = couchdb.server()['_users']
alice = User(name="Alice", password="strongpassword")
alice.store(db)

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