ruby on rails - Mongo::Error::NoServerAvailable -

i configured mongoid rails project, ran rails g mongoid:config edited mongoid.yml below.

development:   clients:     default:       database: abacus_development       # provides hosts default client can connect to. must array       # of host:port pairs. (required)       hosts:          - localhost       options:  test:   clients:     default:       database: abacus_test       hosts:         - localhost       options:         read:           mode: primary         max_pool_size: 1 

then went on thinking running fine, scaffold controller , model called activity. ran rails s. app runs fine @ localhost:3000, moment localhost:3000/activites spits out this.

actionview::template::error (no server available matching preference: #<mongo::serverselector::primary:0x007fbda47c4110 @tag_sets=[], @options={:database=>:abacus_development}, @server_selection_timeout=30>):         15:   </thead>         16:         17:   <tbody>         18:     <% @activities.each |activity| %>         19:       <tr>         20:         <td><%= activity.amount %></td>         21:         <td><%= activity.indicator %></td>   app/views/activities/index.html.erb:18:in `_app_views_activities_index_html_erb___73038992978597028_70226242222820' 

any ideas?

you running mongo right? 'mongod' if you're on mac or 'sudo service mongod start'. might stupid answer never know