hi guys & thx for the suggestions 1) slice: didnt know u can use that on "collections" too, so i give it a try. the boundaries are being checked to not run into a nil situation
2) based on my snippet, insoect works, but if i want to address the attribute like: <%=h category.children[index].id %><br> gives me: Called id for nil, which would mistakenly be 4 -- if you really wanted the id of nil, use object_id not sure how to access or whats actually wrong.... thx again! On Sun, May 9, 2010 at 4:35 AM, Michael Pavling <[email protected]> wrote: > On 9 May 2010 02:17, tom <[email protected]> wrote: > > <% for index in 0 ... 5 %> > > <%=h category.children[index].inspect %><br> > > <% end %> > > >> as u can see, in the for-loop i want for example show only 5 children > > of that specific children. inspect gives me the correct values, but i > > cant address them. whats the proper way here? > > First off, consider what will happen if your category has less than > five children (although you're looping through six!); you'll get a nil > value, and all the child.attribute stuff you'll want to do will break. > So I'd suggest that instead of accessing by index, you iterate a slice > of your collection: > > > <% category.children.slice(0..4) do |child| %> > > <%=h child.inspect %><br> > > <% end %> > > Then, what's the error you're getting when you replace "child.inspect" > with "child.attribute"? (I have a feeling it might have been a "no > method 'attribute' for nilclass...", which won't occur now you're > iterating only existing children, but that's just a hunch ;-) > > -- > 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 [email protected]. > To unsubscribe from this group, send email to > [email protected]<rubyonrails-talk%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > > -- 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
