fix: constantize model_class on reader

lib/avo/concerns/model_class_constantized.rb

@@ -6,14 +6,7 @@ module ModelClassConstantized
       class_methods do
         # Cast the model class to a constantized version and memoize it like that
         def model_class=(value)
-          @model_class = case value
-          when Class
-            value
-          when String, Symbol
-            value.to_s.safe_constantize
-          else
-            raise ArgumentError.new "Failed to find a proper model class for #{self}"
-          end
+          @model_class = value
         end
       end
     end

lib/avo/resources/base.rb

@@ -143,7 +143,17 @@ def get_model_by_name(model_name)
         # where we figure out the model class from the record
         def model_class(record_class: nil)
           # get the model class off of the static property
-          return @model_class if @model_class.present?
+          if @model_class.present?
+            # Cast the model class to a constantized version
+            return case @model_class
+              when Class
+                @model_class
+              when String, Symbol
+                @model_class.to_s.safe_constantize
+              else
+                raise ArgumentError.new "Failed to find a proper model class for #{self}"
+              end
+          end
 
           # get the model class off of the record for STI models
           return record_class if record_class.present?