Calling JS method from Rails Controller

Question

So this is my controller function.

def fb_close
 current_user.update_user_points(SHARE_POINT_ONE, message, current_user.id, 0) if params[:post_id].present?
 respond_to do |format|
 format.js { render :js => "my_function();" }
 end
end

and im trying to go back a js function called my_function inside script tag on the same page. I'm getting an error like ActionController::UnknownFormat

I want to know where i was wrong. Please correct me.

I have a file named fb_close.html.erb i can get the call to that file.. Is there any way i can link it with a js function

• Himesh: From where and how are you calling fb_close action? What is the URL?
• Pavan: You should be better putting the code of my_function in a separate file of format js and call it like format.js { render 'your_file_name' }
• cristian: Wold not be simpler to just create a fb_close.js.erb view and call there my_function(); ???
• Nidhin S G: @Octopus-Paul yea i did that..still im experiencing the same error
• Emad Elsaid: can you let us know what is the url you are trying to call as you have to call your action with .js postfix like so localhost:3000/controller/action.js

Answer 1

You should be better putting the code of my_function in a separate file of format js and call it like format.js { render 'your_file_name' }

respond_to do |format|
 format.js { render 'your_file_name' }
end

You have to create a file like fb_close.js.erb and put the code of my_function in it and call it like this

respond_to do |format|
format.js { render 'fb_close' }
end

• Pavan: @NidhinSG What is the file name you created?
• Nidhin S G: i got fb_close.html.erb file inside which i have placed a code like <% p"------" %> it was shown in terminal.. Is there any way i can load a script file inside that page then?
• Pavan: @NidhinSG Where do you have the code of my_fucntion? Try moving the code of my_function to separate file like fb_close.js.erb and call it as like this.
• Nidhin S G: I told u there is no call going to that function.. im getting an eror..ActionController::UnknownFormat I did like what you said
• Pavan: @NidhinSG What are you trying to do? I you want call the function my_function,do as i said or if you want render just html file,change it to format.html { render 'fb_close' } and file name should be just fb_close.html.erb.