Rails custom text on submit button using variable from partial - ruby-on-rails

Question

I have the following form inside a partial named _configuration_form.html.erb
<%= form_for #configuration, url: admin_config_path, method: :put do |f| %>
<%= f.label :chars %>
<%= f.number_field :chars %>
<%= f.submit #submit_text %>
<% end %>
where I'm passing in #configuration and #submit_text as local variables into the partial, as follows:
<%= render :partial => 'layouts/admin/configuration_form',
:locals => {#configuration => :configuration, #submit_text => "Update configurations"} %>
The #configuration variable appears to be working properly as it is drawing the data from the controller. However, the submit button is showing the default text, as per rails defaults.
My question is: am I doing something wrong here to prevent the desired custom button text from appearing, or is there a way to enforce the use of a local variable? I also tried using "#{#submit_text}" which just showed an empty button (no text at all). Any advice welcome.

Answer 1

The proper syntax for passing locals into a partial is:
<%= render :partial => 'layouts/admin/configuration_form',
:locals => {configuration: #configuration, submit_text: "Update configurations"} %>
Then, the partial should be:
<%= form_for configuration, url: admin_config_path, method: :put do |f| %>
<%= f.label :chars %>
<%= f.number_field :chars %>
<%= f.submit submit_text %>
<% end %>
Alternatively, you could instantiation the #submit_text in your controller and leave your partial like:
<%= form_for #configuration, url: admin_config_path, method: :put do |f| %>
<%= f.label :chars %>
<%= f.number_field :chars %>
<%= f.submit #submit_text %>
<% end %>
And in your controller and call your partial like:
<%= render :partial => 'layouts/admin/configuration_form' %>
In this case, the partial will use the controller variables rather than locals.