This is a tough one I think. I have a comments controller, that I'd like to use for all of my other controllers: such as books, titles, etc.
The problem is, the create action in comments is:
def create
@book = Book.find(params[:book_id])
@comment = @book.comments.create!(params[:comment])
respond_to do |format|
format.html {redirect_to @book}
format.js
end
end
so how can I use the action & comments controller for titles, if its clearly using books attributes?
I'm assuming you have a polymorphic association setup on comment so it can belong to many different types of models? Take a look at this Railscasts episode which shows you how to set that up along with the controller action. Here's the key bit of code.
# comments_controller
def create
@commentable = find_commentable
@comment = @commentable.comments.build(params[:comment])
if @comment.save
flash[:notice] = "Successfully created comment."
redirect_to :id => nil
else
render :action => 'new'
end
end
private
def find_commentable
params.each do |name, value|
if name =~ /(.+)_id$/
return $1.classify.constantize.find(value)
end
end
nil
end
# routes.rb
map.resources :books, :has_many => :comments
map.resources :titles, :has_many => :comments
map.resources :articles, :has_many => :comments
That's something I've mulled over too. You'd have to make the create method independent of the parent, first of all.
Then you'd have a couple options:
I'm fairly new to Rails myself, so I don't know of that's the "correct way" of doing things, maybe someone else has a better solution.
Well, you can't do this generally without being specific about attribute for each of the controllers.
If you wanted to to create a general comments model for a bunch of models in your application, you'd need to pass on the model type that you're commenting to (but not the model itself), and then create a switch that would provide different behaviour based on what you pass.
def create
if params[:type]="book"
@book = Book.find(params[:book_id])
@comment = @book.comments.create!(params[:comment])
respond_to do |format|
format.html {redirect_to @book}
format.js
elsif params[:type]="title"
@title = Title.find(params[:title_id])
@comment = @title.comments.create!(params[:comment])
respond_to do |format|
format.html {redirect_to @title}
format.js
end
end
I think the resource controller is probably what you're looking for. Here's another link on the resource controller.
