Was wondering how you would handle this situation:
# psuedo code - to illustrate the concept # not technically correct * parent has_many: children # # parents_controller.rb def index @parents = Parent.all.includes(:children) end <-- parents/index.html.erb --> <% @parents.each do |parent| %> <%= parent.name %> <%= parent.child.name %> <-- How can I get the latest child only, given the above query? --> <%#= parent.children.last.name %> <-- I could drop the includes statement in the query and fire off an additional query like this in the view, but would prefer not to --> <% end %>
- As I understand it, if a parent has 500 children, all 500 will be loaded in memory? Many parents may have many children. In this situation though, I would want only the latest child – or perhaps the latest 2 children for each parent – is there any way I can load only a few children in the one query and present them
Am wondering how you folks would handle this type of situation?
Appreciate your pointers.