instance variable

lib/sequel/model/exceptions.rb

@@ -31,9 +31,10 @@ class MassAssignmentRestriction < Error
     attr_reader :model
 
     def self.create(msg, model)
-      @model = model
       msg += " for class #{model.class.name}" if model.class.name
-      new(msg)
+      new(msg).tap do |err|
+        err.instance_variable_set(:@model, model)
+      end
     end
   end
 

spec/model/base_spec.rb

@@ -683,6 +683,7 @@ def self.name; 'Item' end
 
     err = proc{item.new(:a=>1)}.must_raise(Sequel::MassAssignmentRestriction)
     err.message.must_equal("method a= doesn't exist for class Item")
+    err.model.class.must_equal(item)
   end
 
   it "should be disabled by strict_param_setting = false" do

spec/model/exceptions_spec.rb

@@ -0,0 +1,15 @@
+require_relative "spec_helper"
+
+describe Sequel::MassAssignmentRestriction, "#create"  do
+  it "should sets model attr" do
+    model_cls = Class.new
+    model_cls.class_eval do
+      def self.name; 'TestModel' end
+    end
+
+    model = model_cls.new
+    err = Sequel::MassAssignmentRestriction.create("method foo doesn't exist", model)
+    err.message.must_equal("method foo doesn't exist for class TestModel")
+    err.model.must_equal(model)
+  end
+end