Hi Colin,
Thank you for your quick response:
I got the link I wanted working perfectly, but not the conditional
part, which would be "icing on the cake." Following are the gory
details. If you can spot how I can be rescued from my fumbling, I'd
be most appreciative.
Best wishes,
Richard
The following in app\views\vendors\show.html.erb works perfectly, but
it's displayed unconditionally:
<%= link_to 'New Expense', '/expenses/new' %>
(A verticule separator from preceding links also displays perfectly,
by also is displayed unconditionally.)
The following produced no syntax error, but it did not display the
link (Vendor::@showExpenseNew == true):
<%= @showExpenseNew ? (link_to 'New Expense', '/expense/new') : "" %>
The following produced no syntax error, but did not display the link
(Vendor::@showExpenseNew == true):
<%= link_to 'New Expense', '/expense/new' if @showExpenseNew %>
The following produced no syntax error, but it did not display the
link (Vendor::@showExpenseNew == true):
<% if @showExpenseNew -%>
<%= link_to 'New Expense', '/expense/new' %>
<% end -%>
The following produced a syntax error (even worse for lower-case
"vendor")
<% if Vendor/@showExpenseNew -%>
<%= link_to 'New Expense', '/expense/new' %>
<% end -%>
On Apr 14, 11:30 am, Colin Law <[email protected]> wrote:
> On 14 April 2010 16:19, RichardOnRails
>
> <[email protected]> wrote:
> > I've got two entities created by scaffolding: Expense & Vendor
>
> > In Expense#new there's a form with a Vendors-drop-down and a NewVendor-
> > button.
> > The latter button brings up Vendor#new.
> > The Create button in Vendor#new brings up Vendor#show with Edit & Back
> > links.
>
> > I want to append a third link conditionally to Vendor#show: if the
> > Expense#new form led to the Vendor#show display, I want a
> > "Return:Expense/New" link to accompany the Edit & Back links.
>
> > Is there a "Rails Way" to do this?
>
> You can set a flag in the controller at the point you know that you
> want to show the link
> @show_return_link = true
> Then test this in the view to see whether to show the link or not
> <%= link_to .... if @show_return_link %>
>
> Colin
>
>
>
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