I have one action which will include the .id for a vendor class through link_to.
That action which is a modification of the new() for a different controller for Reviews needs to pass both the value of the ID from the URL and the session[:user_id] into the database.
How can I grab the value of the vendor.id? Is it possible to not pass it through the URL and place it in the flash instead?
do I use a hidden value to pass the session[:user_id]?
I assume you can access it as params[:id] from the controller action? If so, you should be able to access it as params[:id] in the View. Ditto for session[:user_id].
Edit: I think I may have misunderstood your question. Are you asking about posting the id back through the form? Or possibly not having the id in the url?
If you're passing parameters between controllers, you should usually pass it as a parameter.
<%= link_to "Link to other controller", other_path(@other, :some_param => param_value) %>
In the action you're linking to (here it's SHOW), you'll be able to access :some_param as params[:some_param].
From forms, go ahead and include a hidden field (as long as you're checking to see if it's valid later on, since a user could submit anything).
Either way, don't use the flash to store session state - the flash is for user messages only.
I don't believe people are understanding the question. You pass it through the link but what does the form_tag look like. If you try something like form_tag '/person/new/:id', the form will not submit properly. Is there a way to submit the parameter through the form tag or should you just use a hidden field tag? I believe that is the question being asked.