validate self class on store_in

lib/mongoid/sessions/validators/storage.rb

@@ -19,12 +19,25 @@ module Storage
         #
         # @since 3.0.0
         def validate(klass, options)
-          if !options.is_a?(::Hash) || !valid_keys?(options)
+          if !valid_keys?(options) || !valid_parent?(klass)
             raise Errors::InvalidStorageOptions.new(klass, options)
           end
         end
 
         private
+        # Determine if the current klass is valid to change store_in
+        # options
+        #
+        # @api private
+        #
+        # @param [ Class ] klass
+        #
+        # @return [ true, false ] If the class is valid
+        #
+        # @since 4.0.0
+        def valid_parent?(klass)
+          !klass.superclass.include?(Mongoid::Document)
+        end
 
         # Determine if all keys in the options hash are valid.
         #
@@ -39,6 +52,7 @@ def validate(klass, options)
         #
         # @since 3.0.0
         def valid_keys?(options)
+          return false unless options.is_a?(::Hash)
           options.keys.all? do |key|
             VALID_OPTIONS.include?(key)
           end

spec/mongoid/sessions_spec.rb

@@ -505,6 +505,19 @@
       end
     end
 
+    context "when provided a class that extend another document" do
+
+      let(:klass) do
+        Class.new(Band)
+      end
+
+      it "raises an error" do
+        expect {
+          klass.store_in(database: :artists)
+        }.to raise_error(Mongoid::Errors::InvalidStorageOptions)
+      end
+    end
+
     context "when provided a hash" do
 
       context "when the hash is not valid" do