You can't GET then POST a dataset as new

[dread]

If you try to GET a dataset, purge it then POST it again, it fails checking authz for the group:

Module ckan.controllers.api:278 in create
<<                  (register, subregister))
               try:
                   response_data = action(context, data_dict)
                   location = None
                   if "id" in data_dict:
>>  response_data = action(context, data_dict)
Module ckan.logic.action.create:240 in package_create_rest
<<      api = context.get('api_version') or '1'
       
           check_access('package_create_rest', context, data_dict)
       
           dictized_package = package_api_to_dict(data_dict, context)
>>  check_access('package_create_rest', context, data_dict)
Module ckan.logic:129 in check_access
<<          #    log.debug('Valid API key needed to make changes')
               #    raise NotAuthorized
               logic_authorization = new_authz.is_authorized(action, context, data_dict)
               if not logic_authorization['success']:
                   msg = logic_authorization.get('msg','')
>>  logic_authorization = new_authz.is_authorized(action, context, data_dict)
Module ckan.new_authz:16 in is_authorized
<<      auth_function = _get_auth_function(action)
           if auth_function:
               return auth_function(context, data_dict)
           else:
               raise ValueError(_('Authorization function not found: %s' % action))
>>  return auth_function(context, data_dict)
Module ckan.logic.auth.create:115 in package_create_rest
<<          return {'success': False, 'msg': _('Valid API key needed to create a package')}
       
           return package_create(context, data_dict)
       
       def group_create_rest(context, data_dict):
>>  return package_create(context, data_dict)
Module ckan.logic.auth.create:15 in package_create
<<      else:
               
               check2 = check_group_auth(context,data_dict)
               if not check2:
                   return {'success': False, 'msg': _('User %s not authorized to edit these groups') % str(user)}
>>  check2 = check_group_auth(context,data_dict)
Module ckan.logic.auth.create:90 in check_group_auth
<<      groups = set()
           for group_dict in group_dicts:
               id = group_dict.get('id')
               if not id:
                   continue
>>  id = group_dict.get('id')
AttributeError: 'unicode' object has no attribute 'get'

(using RESTful Model API)

The reason is the POST is expecting the group to be expressed as a dict, not the list of names that GET returns.

[dread]

Fixed in cset:819a74bd1c03 for release 1.5. Note release 1.5 doesn't have #1381 feature, so you're not supposed to create with groups anyway, but this will be useful if people try it.