Rails 3 form_for action with params

Question

<%  form_for [commentable, Comment.new], :action => 'create', :remote => false do |f|%>
<%=f.hidden_field :commentable_id, :value=> commentable.id %><br/>
<%=f.hidden_field :parent_id, :value=>1 %><br/>

And a controller:

def create(commentable)
@commentable = commentable.find(params[:comment][:commentable_id])

How I can pass commentable type to a create action in my for_for? Thanks.

I think you need to reshape your question if you want further assistence, can you share more about your code? — tommasop
– tommasop, Commented Mar 3, 2011 at 9:26
in your controller, try @commentable = Commentable.create(params[:comment][:commentable_id]) — Victor S
– Victor S, Commented Apr 3, 2012 at 20:58

tommasop · Accepted Answer · 2011-03-03 18:05:53Z

1

You need to use

commentable.class

Along the lines of what you already did you can use a hidden field:

<%=f.hidden_field :commentable_type, :value=> commentable.class %><br/>

Then in controller:

@commentable = Object.const_get(params[:comment][:commentable_type]).find(params[:comment][:commentable_id])

edited Mar 3, 2011 at 18:05

answered Mar 3, 2011 at 8:56

tommasop

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2 Comments

Marat_Galiev Over a year ago

Thanks, but how I can pass my commentable object to create action?

Victor S Over a year ago

Why pass the entire object? You can just pass an id and fetch the object later.

Nikita Barsukov · Accepted Answer · 2011-03-03 09:29:01Z

0

You don't need to pass a object explicitly to you create method in controller, if you have commentable model:

def create
  @commentable = Commentable.find(params[:comment][:commentable_id])
  #more code
end

Note capital C in Commentable.

answered Mar 3, 2011 at 9:29

Nikita Barsukov

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1 Comment

Marat_Galiev Over a year ago

Sure, but I use acts_as_commentable_with_threading, and Commentable class doesn't exists.

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