to make the methods within_*_has_many more universal (#13)

* to make the method within_form_has_many more universal

* removed extra empty line

Co-authored-by: Denis Talakevich <cnpaut@gmail.com>

Co-authored-by: Denis Talakevich <cnpaut@gmail.com>

Author: Ivanov-Anton

lib/capybara/active_admin/finders/form.rb

@@ -22,6 +22,13 @@ def within_form_has_many(association_name, index: 0)
           within(fieldset) { yield }
         end
 
+        # @param association_name [String]
+        # @yield within container have_many by passed association_name
+        def within_has_many(association_name)
+          selector = has_many_container_selector(association_name)
+          within(selector) { yield }
+        end
+
         # @yield within filters container.
         def within_filters
           selector = filter_form_selector

lib/capybara/active_admin/selectors/form.rb

@@ -35,6 +35,12 @@ def has_many_fields_selector(association_name)
           "div.has_many_container.#{association_name} > fieldset.inputs.has_many_fields"
         end
 
+        # @param association_name [String]
+        # @return [String] .has_many_container selector.
+        def has_many_container_selector(association_name)
+          ".has_many_container.#{association_name}"
+        end
+
         # @param text [String, nil] submit button text.
         # @return [String] selector.
         def form_submit_selector(text = nil)