Rails: Show form from different model in a view

问题

I have a location model and a post model. I want to allow the user to create new posts from the index page of the location model. How do I do that? I tried rendering the post new.html.erb as a partial in location index.html.erb, but this leads to errors as post new.html.erb references the @post variable.

How should I accomplish this?

回答1:

Try something like this

LocationController

def index
  @location = Location.find(:all)
  @post = Post.new
end

Now ur location view would have access to the instance variable @post. Render a partial using that

render :partial => 'posts/post', :object => @post

回答2:

You can start the form like this:

<%= form_for Post.new do ... %>

回答3:

Just create a @post variable in your action in the LocationsController.

来源：https://stackoverflow.com/questions/7188999/rails-show-form-from-different-model-in-a-view