Question

我正在关注Lynda ruby on rails教程。

以下是我必须运行的代码＆＃34; subject = Subject.new（：name =＆gt;＆＃34; First Subject＆＃34;，：position =＆gt; 1，：visible =＆gt; true）＆＃34;

这是我的错误消息：

ActiveModel::MassAssignmentSecurity::Error: Can't mass-assign protected attributes: name, position, visible
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/activemodel-3.2.9/lib/active_model/mass_assignment_security/sanitizer.rb:48:in `process_removed_attributes'
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/activemodel-3.2.9/lib/active_model/mass_assignment_security/sanitizer.rb:20:in `debug_protected_attribute_removal'
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/activemodel-3.2.9/lib/active_model/mass_assignment_security/sanitizer.rb:12:in `sanitize'
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/activemodel-3.2.9/lib/active_model/mass_assignment_security.rb:230:in `sanitize_for_mass_assignment'
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.9/lib/active_record/attribute_assignment.rb:75:in `assign_attributes'
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/activerecord-3.2.9/lib/active_record/base.rb:497:in `initialize'
    from (irb):9:in `new'
    from (irb):9
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.9/lib/rails/commands/console.rb:47:in `start'
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.9/lib/rails/commands/console.rb:8:in `start'
    from /Users/lexi87/.rvm/gems/ruby-1.9.2-p320/gems/railties-3.2.9/lib/rails/commands.rb:41:in `<top (required)>'
    from script/rails:6:in `require'
    from script/rails:6:in `<main>'

这是我的subject.rb来自模特：

class Subject < ActiveRecord::Base
# attr_accessible :title, :body, :name, :position, :visible
end

Answer 1

您需要取消注释attr_accessible，以解释器忽略的＃字符开头的行

   class Subject < ActiveRecord::Base
        attr_accessible :title, :body, :name, :position, :visible
    end

无法批量分配受保护的属性：名称，位置，可见

attr_accessible 指定可通过质量分配设置的属性列表。

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1 个答案: