单击表单上的提交后，Rails自动更新数据库属性

Question

I am using simple_form in rails to create certain events. To create a new event, you are required to login as a user. The form will ask the user to enter the event name, start date, and end date. When the user clicks the submit button, I want the form to automatically update the attribute user_id in the database.

Right now in the database, the user_id field in the events table is always set to null. However I need this attribute to be set to:

events.user_id = current_user.id

Here is my events table for more info:

Note: I manually entered the values for user_id in this database.

Question: How do I update a database attribute, after a user clicks submit? Or is there a default way of always setting the user_id when a new event is created?

Here is the code in the new.html.erb events view

<%= simple_form_for(@event) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.input :name %>
    <%= f.input :start_at %>
    <%= f.input :end_at %>
  </div>

  <div class="form-actions">
    <%= f.button :submit %>
  </div>
<% end %>

Answer 1

In your create method in your event controller, add your

events.user_id = current_user.id

before the save.

eg if you create the event (in the def create method) with @event = Event.new(params[:event]) then do @link.user_id = current_user.id on the next line
You can probably do @link.user = current_user and rails will figure the id out.