Question

What did I do:

1. create a new ruby app rails new campaigns_manager
2. move to campaigns_manager directory, generate first scaffold campaigns
   rails generate scaffold campaign name:string and migrate
3. add root route root to: 'campaigns#index', as: 'campaigns'

Such a few strings of code. Then I start server to test it. Everything looks and works ok, but when I try to add a new campaign, nothing saves. After pressing “Create campaign” button I receive in console something like that:

Started POST "/" for 127.0.0.1 at 2012-04-25 22:30:40 +0300
Processing by CampaignsController#index as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"sKom3YBDEbOcqbSt3gLGWPqBNeqkEw6M59hlwrmH4tM=", "campaign"=>{"name"=>"test"}, "commit"=>"Create Campaign"}
  Campaign Load (0.3ms)  SELECT "campaigns".* FROM "campaigns" 
  Rendered campaigns/index.html.erb within layouts/application (0.9ms)
Completed 200 OK in 37ms (Views: 35.4ms | ActiveRecord: 0.3ms)

then I redirect to campaigns list and there is no new campaign. Table campaigns in db\development.sqlite3 is empty.
Furthermore, I add print methods to campaigns controller to check if I call correct methods. And I see, that create method is not called when I press “Create campaign” button.
My campaigns/new view:

<h1>New campaign</h1>

<%= form_for(@campaign) do |f| %>

  <div class="field">
    <%= f.label :name %><br />
    <%= f.text_field :name %>
  </div>
  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

<%= link_to 'Back', campaigns_path %>

Why cannot I save my campaigns to database?

Answer 1

The problem is in the routes.rb file.

root to: 'campaigns#index', as: 'campaigns'

The alias as: 'campaigns' tries to consume all requests. There is no need to add an alias to your root directive, it already has one by default: as: 'root'

Your routes.rb file has to look something like this:

resources :campaigns
root to: 'campaigns#index'

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