Hidden field not updating sqllite table in rails app

im a noob with rails and I cant understand why a hidden field that i have in a form is not updating in the table. My form looks like this:

<%= form_for(@cricket_club_advert) do |f| %>
  <% current_user_id = current_user.id %>
  <%= hidden_field_tag "user_id", current_user_id %>

<% if @cricket_club_advert.errors.any? %>
<div id="error_explanation">
  <h2><%= pluralize(@cricket_club_advert.errors.count, "error") %> prohibited this cricket_club_advert from being saved:</h2>

  <ul>
  <% @cricket_club_advert.errors.full_messages.each do |message| %>
    <li><%= message %></li>


  <% end %>
  </ul>
</div>
<% end %>
  <div class="row">
    <div class="large-6 columns">

      <%= f.label "Title" %>
      <%= f.text_field :title %>
    </div>
  </div>
  <div class="row">
    <div class="large-6 columns">
      <%= f.label "Type of Player Required" %>
      <%= f.text_field :player_type %>
    </div>
  </div>

I have added the field user_id to the accepted params, this can be seen here:

def cricket_club_advert_params
  params[:cricket_club_advert].permit(:user_id, :title, :player_type, :description, :airfares, :accomadation, :job, :incentives)
end

However, when ever i create or edit a new record the field does not get updated and no errors are created.

If I make the field in the form a text_field with the id user_id it works fine.

Thanks in advance