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我在 Rails 4 应用程序中使用letsrate gem。我已将 gem 添加到我的 lib 文件中，并对其进行了一些更改以使其与 Rails 4 一起使用。现在我收到了一个已弃用的警告，如下所示：

DEPRECATION WARNING: The following options in your Performer.has_many :rates_without_dimension declaration are deprecated: :conditions. Please use a scope block instead. For example, the following:

    has_many :spam_comments, conditions: { spam: true }, class_name: 'Comment'

should be rewritten as the following:

    has_many :spam_comments, -> { where spam: true }, class_name: 'Comment' . (called from letsrate_rateable at /home/aravind/Documents/dev/gw-c4u/lib/letsrate/lib/letsrate/model.rb:76) DEPRECATION WARNING: The following options in your Performer.has_one :rate_average_without_dimension declaration are deprecated: :conditions. Please use a scope block instead. For example, the following:

    has_many :spam_comments, conditions: { spam: true }, class_name: 'Comment'

should be rewritten as the following:

    has_many :spam_comments, -> { where spam: true }, class_name: 'Comment' . (called from letsrate_rateable at /home/aravind/Documents/dev/gw-c4u/lib/letsrate/lib/letsrate/model.rb:79) DEPRECATION WARNING: The following options in your Performer.has_many :performance_rates declaration are deprecated: :conditions. Please use a scope block instead. For example, the following:

    has_many :spam_comments, conditions: { spam: true }, class_name: 'Comment'

should be rewritten as the following:

    has_many :spam_comments, -> { where spam: true }, class_name: 'Comment' . (called from block in letsrate_rateable at /home/aravind/Documents/dev/gw-c4u/lib/letsrate/lib/letsrate/model.rb:84) DEPRECATION WARNING: The following options in your Performer.has_one :performance_average declaration are deprecated: :conditions. Please use a scope block instead. For example, the following:

    has_many :spam_comments, conditions: { spam: true }, class_name: 'Comment'

should be rewritten as the following:

    has_many :spam_comments, -> { where spam: true }, class_name: 'Comment' . (called from block in letsrate_rateable at /home/aravind/Documents/dev/gw-c4u/lib/letsrate/lib/letsrate/model.rb:91)

产生此类错误的文件部分是这样的：

module ClassMethods

def letsrate_rater
  has_many :ratings_given, :class_name => "Rate", :foreign_key => :rater_id       
end    

def letsrate_rateable(*dimensions)
  has_many :rates_without_dimension, :as => :rateable, :class_name => "Rate", :dependent => :destroy, :conditions => {:dimension => nil}
  has_many :raters_without_dimension, :through => :rates_without_dimension, :source => :rater  

  has_one :rate_average_without_dimension, :as => :cacheable, :class_name => "RatingCache", 
          :dependent => :destroy, :conditions => {:dimension => nil}


  dimensions.each do |dimension|        
    has_many :"#{dimension}_rates", :dependent => :destroy, 
                                   :conditions => {:dimension => dimension.to_s}, 
                                   :class_name => "Rate", 
                                   :as => :rateable

    has_many :"#{dimension}_raters", :through => "#{dimension}_rates", :source => :rater         

    has_one :"#{dimension}_average", :as => :cacheable, :class_name => "RatingCache", 
                                    :dependent => :destroy, :conditions => {:dimension => dimension.to_s}
  end                                                    
end

我尝试将 :dependent=>:destroy 带到该行的最后一部分并将条件 => {:dimension => dimension.to_s} 更改为 -> {:dimension => dimension.to_s}。它只会抛出错误。我究竟做错了什么？

4

2 回答 2

0

尝试：

-> { where(:dimension => dimension.to_s)}
于 2013-10-01T08:37:45.543 回答
0

范围（或 lambda）必须是第二个参数，后跟选项哈希

has_one :rate_average_without_dimension, -> { where dimension: nil }, { :as => :cacheable, :class_name => "RatingCache", :dependent => :destroy }

APIDock 的 has_one

于 2014-05-28T21:10:41.070 回答