1 files changed, 33 insertions, 0 deletions
diff --git a/db/migrate/20190620105427_change_null_private_profile_to_false.rb b/db/migrate/20190620105427_change_null_private_profile_to_false.rb
new file mode 100644
index 00000000000..d820dbbe9d3
--- /dev/null
+++ b/db/migrate/20190620105427_change_null_private_profile_to_false.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+class ChangeNullPrivateProfileToFalse < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  DELAY = 30.seconds.to_i
+  BATCH_SIZE = 1_000
+
+  disable_ddl_transaction!
+
+  class User < ActiveRecord::Base
+    self.table_name = 'users'
+
+    include ::EachBatch
+  end
+
+  def up
+    change_column_default :users, :private_profile, false
+
+    # Migration will take about 120 hours
+    User.where(private_profile: nil).each_batch(of: BATCH_SIZE) do |batch, index|
+      range = batch.pluck('MIN(id)', 'MAX(id)').first
+      delay = index * DELAY
+
+      BackgroundMigrationWorker.perform_in(delay.seconds, 'MigrateNullPrivateProfileToFalse', [*range])
+    end
+  end
+
+  def down
+    change_column_default :users, :private_profile, nil
+  end
+end