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这里是模型的一部分(整个模型已经变大了)：
class Scorecard < ActiveRecord::Base belongs_to :course belongs_to :user validate :attributes_consistency def attributes_consistency # Executed for all scorecards. checks if the user completed the hole attributes correctly if ( params[:no_fairways] and any_fairways? and !only_nine? ) or ( params[:no_fairways] and !any_h1_to_h9_score_blank and any_h1_to_h9_fairway? and only_nine? ) or ( params[:no_fairways] and !any_h10_to_h18_score_blank and any_h10_to_h18_fairway? and only_nine? ) errors.add_to_base("You iniDicated that you missed all the fairways,but you also marked one or more fairways in the scorecard. Either uncheck the fairways mistakenly marked or uncheck the 'No fairways' checkbox.") end if ( params[:no_girs] and any_girs? and !only_nine? ) or ( params[:no_girs] and !any_h1_to_h9_score_blank and any_h1_to_h9_gir? and only_nine? ) or ( params[:no_girs] and !any_h10_to_h18_score_blank and any_h10_to_h18_gir? and only_nine? ) errors.add_to_base("You iniDicated that you missed all the greens,but you also marked one or more greens in the scorecard. Either uncheck the marked greens on the scorecard or uncheck the 'No GIRs' checkbox.") end end # attributes_consistency def any_h1_to_h9_score_blank? h1_score.blank? or h2_score.blank? or h3_score.blank? or h4_score.blank? or h5_score.blank? or h6_score.blank? or h7_score.blank? or h8_score.blank? or h9_score.blank? end def any_h10_to_h18_score_blank? h10_score.blank? or h11_score.blank? or h12_score.blank? or h13_score.blank? or h14_score.blank? or h15_score.blank? or h16_score.blank? or h17_score.blank? or h18_score.blank? end def any_h1_to_h9_fairway? h1_fairway? or h2_fairway? or h3_fairway? or h4_fairway? or h5_fairway? or h6_fairway? or h7_fairway? or h8_fairway? or h9_fairway? end def any_h10_to_h18_fairway? h10_fairway? or h11_fairway? or h12_fairway? or h13_fairway? or h14_fairway? or h15_fairway? or h16_fairway? or h17_fairway? or h18_fairway? end def any_h1_to_h9_gir? h1_gir? or h2_gir? or h3_gir? or h4_gir? or h5_gir? or h6_gir? or h7_gir? or h8_gir? or h9_gir? end def any_h10_to_h18_gir? h10_gir? or h11_gir? or h12_gir? or h13_gir? or h14_gir? or h15_gir? or h16_gir? or h17_gir? or h18_gir? end
那么如何从模型中访问参数？
您不需要虚拟属性的相应模型属性.将属性本地定义为保持状态的@no_fairways.
class ScoreCard < ActiveRecord::Base # define attributes and accessors for both fields attr_accessor :no_fairways,:no_girs .. end
现在里面你可以写：
<% form_for @scorecard %> <%= f.check_box :no_fairways %> <% end %>
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