21 lines
544 B
Ruby
21 lines
544 B
Ruby
class AddGroupIdToMilestones < ActiveRecord::Migration[4.2]
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DOWNTIME = false
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def up
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return if column_exists? :milestones, :group_id
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change_column_null :milestones, :project_id, true
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add_column :milestones, :group_id, :integer
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end
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def down
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# We cannot rollback project_id not null constraint if there are records
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# with null values.
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execute "DELETE from milestones WHERE project_id IS NULL"
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remove_column :milestones, :group_id
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change_column :milestones, :project_id, :integer, null: false
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end
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end
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