Clean way to "inject" raw text from within a <%%> block?

rubyonrails-talk
1

Source : <% case list_type.upcase when "BASE" then %> Base Coverages <% when "OPTIONAL" then %> Optional Coverages <% else "asdfadasdF" %> Bogus <% end %>

The above just looks sloppy to me...

I would have hoped for something like...

<% case list_type.upcase when "BASE" then inject("Base Coverages") when "OPTIONAL" then inject("Optional Coverages") else "asdfadasdF" then inject("Bogus") end %>

I hate matching up the <%... 's. It is just to prone to error.

Jason

2

Hello Jason,

<% case list_type.upcase when "BASE" then %> Base Coverages <% when "OPTIONAL" then %> Optional Coverages <% else "asdfadasdF" %> Bogus <% end %>

case returns it's value, so you can do it like this:

<%= case list_type.upcase when 'BASE'; "Base Coverages" when 'OPTIONAL'; "Optional Coverages" else; "whatever end %>

Hope that helps !

3

Hello Jason,

Source : <% case list_type.upcase when "BASE" then %> Base Coverages <% when "OPTIONAL" then %> Optional Coverages <% else "asdfadasdF" %> Bogus <% end %>

The above just looks sloppy to me...

I would have hoped for something like...

<% case list_type.upcase when "BASE" then inject("Base Coverages") when "OPTIONAL" then inject("Optional Coverages") else "asdfadasdF" then inject("Bogus") end %>

you're not far :

<%= case list_type.upcase    when 'BASE' : 'Base Coverages' # different style    when "OPTIONAL" then "Optional Coverages"    else "asdfadasdF" then "Bogus" end %>

You can also use an Hash with "Bogus" as default value.

    -- Jean-François.

4

Both of these are great. Is there a general technique to this? If I had done with an "If..Elsif..." block, what would it have looked like? And is there a way to "inject" text?

Thanks, Jason

5

Jason :

Both of these are great. Is there a general technique to this? If I had done with an "If..Elsif..." block, what would it have looked like?

<%= if list_type.upcase =='BASE'    'Base Coverages' else   'Bogus' %>

Or using ? : <%= list_type.upcase == 'BASE' ? 'Base Coverages' : 'Bogus' %>

Note that in Ruby code, you can do assignments like that :

foo = if something == something_else   'bar' else   'baz' end

but ? : will be more often used. And you can use case/when as well

foo = case ..   when ... end

And is there a way to "inject" text?

yes : _erbout.concat('foo')

don't forget also, that helpers can make your ERb code cleaner.

   -- Jean-François.