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When I add
attr_accessor :minor_edit, :title, :body, :slug, :domain_id
in my Post model, when I save the model by
post = Post.new(:title => "123", body => "456")
post.save
The database said the title column is null
When you set
attr_accessor :titleyou override ActiveRecords setter method. You want to useattr_accessibleinstead to stop mass assignment.http://api.rubyonrails.org/classes/ActiveModel/MassAssignmentSecurity/ClassMethods.html