Trouble passing :id of one model to another model

Rails
1

Hello,

I’m having trouble workign with two models, specifically passing the
id of my “Tools” model to New controller of my task model.

I am creating a page that keeps track of tools we are building in our
group. For each tool, there can be several tasks associated with
completing the code/process of the tool. I have a model for tool
(“tools”) and a model for tasks (“tooltasks”). On the tools view,
each tool is listed out in table format. Next to each tool is a
button/link called “add task”. When the user clicks this button, I
would like to bring up the tooltasks#new view with the tool.id (or
just tool passed to the form). This is where its not working and i’m
stuck. Any help out there?

offending code:

—> tools main page = “index.html.erb”

<% for tool in @tools %> "> <%=link_to tool.title, tool %> <%=h tool.description %> <%=h tool.status %> <%=h tool.priority %> <%=h tool.owner %> <%=h tool.eta %> <%= button_to 'Add Task', new_tooltask_path,:id => tool.id %> <%= button_to 'Edit', edit_tool_path(tool) %> <%= button_to 'Destroy', tool, :confirm => 'Are you sure?', :method => :delete %> <% end %>

tooltasks_controller.rb
def new
@tooltask = Tooltask.new

     # is this the problem????
     @tool = Tool.find(params[:id])

     respond_to do |format|
       format.html # new.html.erb
       format.xml  { render :xml => @tooltask }
     end
 end

What’s going on? What am I missing? thanks for any help

Dave

2

On 2/29/08, loominator1970 [email protected] wrote:

each tool is listed out in table format. Next to each tool is a

<tr valign="top" class="<%=cycle("tool-line-odd","tool-line-even") <%=h tool.owner <% end %> 
     respond_to do |format|
       format.html # new.html.erb
       format.xml  { render :xml => @tooltask }
     end
 end

what’s the error that’s produced? What’s the backtrace of the error?
What does the error message indicate is the offending line? I assume
you’re getting a ActiveRecord::RecordNotFound exception. What are the
params being passed to your TooltasksController#new method? I’m
guessing that params[:id] is actually nil…

Try using:

new_tooltask_path(:tool_id => tool.id)

and in your controller:

@tool = Tool.find_by_id(params[:tool_id])

also remember to never call Class.find() without enclosing it within a
begin/rescue block, otherwise you’ll raise an exception if no record
is found. Or use find_by_id and check to make sure that it actually
returns a record.

You could also look into nested routes if you want to make your urls
look prettier, since the above will generate something like:

tooltask/new?tool_id=1234

whereas with a nested route, you could use something like

tools/1234/tasks/new

Mike

3

Works like a dream! thanks Mike, and thanks for the advice!

Dave