About scope of form_with

There was such a form, but what did scope mean?


<%= form_with scope: :session, url: sessions_path do |f| %>
  <%= f.text_field :name %>
  <%= f.submit %>
<% end %>

Let's take a look at the verification tool for the time being I see, it works like this.


<form action="/sessions" method="post" data-remote="true">
  <input type="text" name="session[name]">
</form>

So what does the scope option do?

The value given to the spope object is the prefix of the name value

name = "session[name]"

The parameters are sent in the form of. That

It's not difficult to think because session is just added to the parameter prefix.



def create
  #Session the value sent using the scope[:user_id]Substitute in
  session[:user_name] = session_params[:name]
end

It means that it works like this. It wasn't a big deal.

That's all for today. form_with There are so many different things.

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