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16 lines
492 B
Ruby
16 lines
492 B
Ruby
class AddCounterCacheToProtocols < ActiveRecord::Migration[4.2]
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def up
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add_column :protocols, :nr_of_synced_children, :integer, default: 0
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# Okay, now initialize the values of synced children
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Protocol.find_each do |protocol|
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children_count = select_value("SELECT COUNT(*) FROM protocols WHERE parent_id=#{protocol.id};")
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protocol.update(nr_of_synced_children: children_count)
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end
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end
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def down
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remove_column :protocols, :nr_of_synced_children
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end
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end
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