Question

I’m trying to learn from a tutorial how to use Rails as Backend for an iPhone Application. And it seems I fail at a very early beginning.
The tutorial says after I created the scaffold “Goal”, I should add JSON handling to the respond_to blocks in the actions of the GoalsController:

def index
  @goals = Goal.all

  respond_to do |format|
    format.html
    format.xml  { render :xml => @goals }
    format.json { render :json => @goals }
  end
end

by the way, that’s how my scaffolded controller was filled before:

  def index
    @goals = Goal.all

    respond_to do |format|
      format.html # index.html.erb
        format.json { render json: @goals }
    end
  end

the error happens when I want to request resource with a json format (yes, I already filled the table with data):

$ curl http://localhost:3000/goals/1.json
curl: (7) couldn't connect to host

My questions:
1. Is this step necessary for me if there’s already some json-code (even with different syntax)?
2. how to solve the problem? I just followed the instructions and nothing more…

some additional note: The tutorial deals with Rails 3.0 and I have Rails 3.2 on my machine. Are there some syntax-differences?

Answer 1

Did you start your rails server yet by running rails s? It seems you haven’t started your rails server yet. After running this command, you should be able to see the incoming requests in your terminal.

The other thing is that your code is about index action, while you made request to the show action.

index
http://localhost:3000/goals.json

show
http://localhost:3000/goals/1.json