Question

I seem to be getting a routing error within my Rails project each time I try access the index for “Bank Accounts”. I’m quite new to Rails so this should probably be a simple error. If I’ve missed anything I apologise.

Errors I’m getting:

ActionController::RoutingError in Bank_accounts#index
Showing app/views/bank_accounts/index.html.erb where line #21 raised

This is the line of code that Rails doesn’t seem to like:

<td><%= link_to 'Transaction Details', bank_account_transaction_path(bank_account) %>  </td>

Routes file:

ActionController::Routing::Routes.draw do |map|
map.resources :bank_accounts, :has_many => [:transactions]

map.root :controller => "bank_accounts"

map.connect ':controller/:action/:id'
map.connect ':controller/:action/:id.:format'
end

Index view for Bank Accounts

<% @bank_accounts.each do |bank_account| %>
<tr>
<td><%=h bank_account.account_number %></td>
<td><%=h bank_account.holders_name %></td>
<td><%=h bank_account.overdraft_limit %></td>
<td><%=h bank_account.current_balance %></td>
<td><%=h bank_account.active %></td>
<td><%= link_to 'Show', bank_account %></td>
<td><%= link_to 'Edit', edit_bank_account_path(bank_account) %></td>
<td><%= link_to 'Transaction Details', bank_account_transaction_path(bank_account) %>      </td>
<td><%= link_to 'Destroy', bank_account, :confirm => 'Are you sure?', :method => :delete %></td>
</tr>
<% end %>
</table>

Answer 1

My understanding of the Rails naming convention is that if you want to link to an index of nested resources, you need to use the plural:

bank_account_transactions_path(bank_account)

And if you want to link to a particular nested resource, use the singular and pass in the nested resource ID as a second argument:

bank_account_transaction_path(bank_account, txnid)

And this question has an example of a cleaner syntax – you might like that better.

hope that helps!