first commit

database/migrations/002_subscription_custom_intervals.sql

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+BEGIN;
+
+ALTER TABLE subscriptions
+  ADD COLUMN IF NOT EXISTS custom_interval_value integer,
+  ADD COLUMN IF NOT EXISTS custom_interval_unit text;
+
+DO $$
+BEGIN
+  IF EXISTS (
+    SELECT 1
+    FROM information_schema.columns
+    WHERE table_name = 'subscriptions' AND column_name = 'custom_interval_days'
+  ) THEN
+    UPDATE subscriptions
+    SET
+      custom_interval_value = COALESCE(custom_interval_value, custom_interval_days),
+      custom_interval_unit = CASE
+        WHEN custom_interval_days IS NOT NULL THEN COALESCE(custom_interval_unit, 'days')
+        ELSE custom_interval_unit
+      END;
+  END IF;
+END $$;
+
+ALTER TABLE subscriptions
+  DROP COLUMN IF EXISTS custom_interval_days;
+
+DO $$
+BEGIN
+  IF NOT EXISTS (
+    SELECT 1
+    FROM pg_constraint
+    WHERE conname = 'subscriptions_custom_interval_value_positive'
+  ) THEN
+    ALTER TABLE subscriptions
+      ADD CONSTRAINT subscriptions_custom_interval_value_positive
+      CHECK (custom_interval_value > 0);
+  END IF;
+  IF NOT EXISTS (
+    SELECT 1
+    FROM pg_constraint
+    WHERE conname = 'subscriptions_custom_interval_unit_valid'
+  ) THEN
+    ALTER TABLE subscriptions
+      ADD CONSTRAINT subscriptions_custom_interval_unit_valid
+      CHECK (custom_interval_unit IN ('days', 'weeks', 'months', 'years'));
+  END IF;
+END $$;
+
+COMMIT;