21 lines
729 B
Ruby
21 lines
729 B
Ruby
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class MessageCounts < ActiveRecord::Migration
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def self.up
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add_column :conversation_participants, :message_count, :int, :default => 0
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execute <<-SQL
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UPDATE conversation_participants
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SET message_count = (
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SELECT COUNT(*)
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FROM conversation_messages, conversation_message_participants
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WHERE conversation_messages.conversation_id = conversation_participants.conversation_id
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AND NOT conversation_messages.generated
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AND conversation_messages.id = conversation_message_participants.conversation_message_id
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AND conversation_participant_id = conversation_participants.id
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)
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SQL
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end
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def self.down
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remove_column :conversation_participants, :message_count
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end
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end
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