将文本字段值传递给Rails Controller

Question

I'm fairly new to Rails and I'm stuck with passing a text field value to Rails Controller method. Any help is appreciated, below is my code..

View code:

Upon click of the below button I want to be able to send the username to the Controller method..

<%= link_to "My button", admin_user_creds_path(user_config),
        method: :test_user, role: "button" %>

The username is entered in a text field:

<%= form_for [:admin, user_config] do |f| %>
  <td class="js-editable-text rf-table__td rf-table__col--username">
  <div class="preview js-preview show"><%= user_config.username %></div>
  <div class="js-input hide"><%= f.text_field :username, class: "form-control" %></div>
</td>

My routes file:

post "/user_configurations/:id", to: "user_configurations#test_user", as: "user_creds"

My controller:

def test_user
  username = user_params[:username]
end
def user_params
  params.require(:user_configurations).permit(:username)
end

Answer 1

Instead of using link_to helper you need add a submit button to your form.

<%= form_for [:admin, user_config] do |f| %>
  <td class="js-editable-text rf-table__td rf-table__col--username">
  <div class="preview js-preview show"><%= user_config.username %></div>
  <div class="js-input hide"><%= f.text_field :username, class: "form-control" %></div>
  <%= f.submit "My button" %>
</td>

Also please note that method option in link_to helper is either get or post HTTP methods but not the controller action