Rails - Feb 2008 - Trouble passing :id of one model to another model

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"
<div id="tool-list">
<% for tool in @tools %>
<tr valign="top"
class="<%=cycle("tool-line-odd","tool-line-even")
%>">
  <tr>
    <td width="15%" valign="top"
class="tool-title"><%=link_to
tool.title, tool %></td>
    <td width="15%" valign="top"
class="tool-title"><%=h
tool.description %></td>
    <td width="15%" valign="top"
class="tool-title"><%=h tool.status
%></td>
    <td width="15%" valign="top"
class="tool-title"><%=h tool.priority
%></td>
    <td width="15%" valign="top"
class="tool-title"><%=h tool.owner
%></td>
    <td width="15%" valign="top"
class="tool-title"><%=h tool.eta %></
td>
    <td valign="top"><%= button_to ''Add
Task'', new_tooltask_path,:id
=> tool.id %></td>
    <td valign="top"><%= button_to ''Edit'',
edit_tool_path(tool) %></
td>
    <td valign="top"><%= button_to
''Destroy'', tool, :confirm => ''Are
you sure?'', :method => :delete %></td>
  </tr>
<% end %>
</table>
</div>


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
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

On 2/29/08, loominator1970
<loominator1970-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
>  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"
>  <div id="tool-list">
>  <% for tool in @tools %>
>  <tr valign="top"
class="<%=cycle("tool-line-odd","tool-line-even")
>  %>">
>   <tr>
>     <td width="15%" valign="top"
class="tool-title"><%=link_to
>  tool.title, tool %></td>
>     <td width="15%" valign="top"
class="tool-title"><%=h
>  tool.description %></td>
>     <td width="15%" valign="top"
class="tool-title"><%=h tool.status
>  %></td>
>     <td width="15%" valign="top"
class="tool-title"><%=h tool.priority
>  %></td>
>     <td width="15%" valign="top"
class="tool-title"><%=h tool.owner
>  %></td>
>     <td width="15%" valign="top"
class="tool-title"><%=h tool.eta %></
>  td>
>     <td valign="top"><%= button_to ''Add
Task'', new_tooltask_path,:id
>  => tool.id %></td>
>     <td valign="top"><%= button_to
''Edit'', edit_tool_path(tool) %></
>  td>
>     <td valign="top"><%= button_to
''Destroy'', tool, :confirm => ''Are
>  you sure?'', :method => :delete %></td>
>   </tr>
>  <% end %>
>  </table>
>  </div>
>
>
>  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 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

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---

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

Dave



On Feb 29, 2:31 pm, "Mike Garey"
<random...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> On 2/29/08, loominator1970
<loominator1...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
>
>
>
>
> >  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"
> >  <div id="tool-list">
> >  <% for tool in @tools %>
> >  <tr valign="top"
class="<%=cycle("tool-line-odd","tool-line-even")
> >  %>">
> >   <tr>
> >     <td width="15%" valign="top"
class="tool-title"><%=link_to
> >  tool.title, tool %></td>
> >     <td width="15%" valign="top"
class="tool-title"><%=h
> >  tool.description %></td>
> >     <td width="15%" valign="top"
class="tool-title"><%=h tool.status
> >  %></td>
> >     <td width="15%" valign="top"
class="tool-title"><%=h tool.priority
> >  %></td>
> >     <td width="15%" valign="top"
class="tool-title"><%=h tool.owner
> >  %></td>
> >     <td width="15%" valign="top"
class="tool-title"><%=h tool.eta %></
> >  td>
> >     <td valign="top"><%= button_to ''Add
Task'', new_tooltask_path,:id
> >  => tool.id %></td>
> >     <td valign="top"><%= button_to
''Edit'', edit_tool_path(tool) %></
> >  td>
> >     <td valign="top"><%= button_to
''Destroy'', tool, :confirm => ''Are
> >  you sure?'', :method => :delete %></td>
> >   </tr>
> >  <% end %>
> >  </table>
> >  </div>
>
> >  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 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
--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups
"Ruby on Rails: Talk" group.
To post to this group, send email to
rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
To unsubscribe from this group, send email to
rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org
For more options, visit this group at
http://groups.google.com/group/rubyonrails-talk?hl=en
-~----------~----~----~----~------~----~------~--~---