Question

I am doing this:

user = User.find( params[:id] )

when I do:

user.section_id

it says:

nomethoderror exception undefined method 'section_id' for <#Array:0x.....>

Why does it say <#Array?

In rails console, everything works fine when I do: u = User.find(2)

Update

My javascript is doing this:

$.ajax({
            type: "POST",
            url: "/user/add_section",
            dataType: "html",
            data: { id: id, section_text: sectionText
            },
            success: function(payload) {

            },
            error: function(jqx, ts, et) {

            },
            complete: function(){}
        });

Using chrome I can see that the id is 8.

My controller action:

def add_section

  user = User.find(params[:id])

  section_id = user.section_id   # error!!

end

I put a debugger in this code, and the object does load properly, it just that it loads into an array so this works:

user[0].section_id

but in irb it works fine with: user.section_id for the exact same value passed to the find method.

Answer 1

user = User.find( params[:id] )

Looks like params[:id] return an Array, so user – is an Array of users actually. Or it can be just one id wrap into [] like: user = User.find [8] – which will still return an Array with one element

So you should debug your params[:id].

UPD

Also here is a problem in your application. It is not REST. You should call /user/:id/add_section path instead of /user/add_section.

Your routes:

resources :users do
  post :add_section, :on => :member
end