diff --git a/lib/generators/jsonapi/swagger/swagger_generator.rb b/lib/generators/jsonapi/swagger/swagger_generator.rb
index 4e21d71..ddc9e4a 100644
--- a/lib/generators/jsonapi/swagger/swagger_generator.rb
+++ b/lib/generators/jsonapi/swagger/swagger_generator.rb
@@ -132,14 +132,15 @@ module Jsonapi
         end
         model_klass.columns.each do |col|
           col_name = transform_method ? col.name.send(transform_method) : col.name
-          clos[col_name.to_sym] = { type: swagger_type(col), items_type: col.type, is_array: col.array,  nullable: col.null, comment: col.comment }
+          is_array = col.respond_to?(:array) ? col.array : false
+          clos[col_name.to_sym] = { type: swagger_type(col), items_type: col.type, is_array: is_array,  nullable: col.null, comment: col.comment }
           clos[col_name.to_sym][:comment] = safe_encode(col.comment) if need_encoding
         end
       end
     end
 
     def swagger_type(column)
-      return 'array' if column.array
+      return 'array' if column.respond_to?(:array) && column.array
 
       case column.type
       when :bigint, :integer then 'integer'
@@ -168,4 +169,4 @@ module Jsonapi
       content&.force_encoding('ASCII-8BIT')
     end
   end
-end
\ No newline at end of file
+end