Backport to 3-0 stable branch ransack error with filters when ActiveS…

…torage is used (#8137) (#8164)

feat: check ransackable_associations when checking searchable_has_many_through

Co-authored-by: Edmund Tay <edmundtay96@gmail.com>

lib/active_admin/filters/formtastic_addons.rb

@@ -47,7 +47,7 @@ def polymorphic_foreign_type?(method)
       #
 
       def searchable_has_many_through?
-        if reflection && reflection.options[:through]
+        if klass.ransackable_associations.include?(method.to_s) && reflection && reflection.options[:through]
           reflection.through_reflection.klass.ransackable_attributes.include? reflection.foreign_key
         else
           false