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class SmartProxyReference
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attr_reader :join_relation, :columns
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def initialize(hash)
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@join_relation = hash.keys.first
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@columns = hash.values.first
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end
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def columns_to_s
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@columns.map(&:to_s)
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end
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def join?
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@join_relation != :self
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end
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def merge(other)
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@columns = @columns.concat(other.columns).uniq
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end
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def host_reflection
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Host::Managed.reflections[@join_relation.to_s]
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end
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def valid?
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!!host_reflection
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end
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def table_name
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valid? ? host_reflection.table_name : nil
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end
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def map_column_names(count)
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return [] unless join?
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@columns.map do |col_name|
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alias_name = (count > 0) ? "#{@join_relation.to_s.pluralize}_hosts" : table_name
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"#{alias_name}.#{col_name}"
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end
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end
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end
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