25 lines
474 B
Ruby
25 lines
474 B
Ruby
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class CustomRankOrder
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def initialize(attribute, ordered_values)
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@attribute = attribute
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@ordered_values = ordered_values
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end
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def sql
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Arel.sql case_statement
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end
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private
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attr_accessor :attribute, :ordered_values
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def case_statement
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["CASE", case_conditions, "END"].join(" ")
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end
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def case_conditions
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ordered_values.map.with_index do |release, index|
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"WHEN #{attribute}='#{release}' THEN '#{index+1}'"
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end.join(" ")
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end
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end
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