Typo:
The variable name is not #{partial_name}_counter, in fact it is #{variable_name}_counter <%= render partial: "post", collection: @posts %> makes the counter post_counter. <%= render partial: "my_partial", collection: @items, as: :item %> makes the counter item_counter.
Typo:
The variable name is not
#{partial_name}_counter, in fact it is#{variable_name}_counter<%= render partial: "post", collection: @posts %>makes the counterpost_counter.<%= render partial: "my_partial", collection: @items, as: :item %>makes the counteritem_counter.