Jun 24 - Implement devices tracker - Phase32 migration script

migrations/versions/phase32_device_token_columns.py

@@ -0,0 +1,40 @@
+"""phase32 — add ios_version and last_seen_at to api_device_tokens
+
+phase31 recorded as applied but the ALTER statements never ran because
+the migration used op.get_bind() pattern that failed silently.
+This migration adds the two columns using raw SQL with IF NOT EXISTS
+(same pattern as all working migrations in this project).
+Also drops the orphaned device_registrations table from phase30 if present.
+"""
+
+from alembic import op
+
+revision      = 'phase32_device_token_columns'
+down_revision = 'phase31_device_registry'
+branch_labels = None
+depends_on    = None
+
+
+def upgrade():
+    op.execute("""
+        ALTER TABLE api_device_tokens
+        ADD COLUMN IF NOT EXISTS ios_version VARCHAR(20) NULL
+    """)
+
+    op.execute("""
+        ALTER TABLE api_device_tokens
+        ADD COLUMN IF NOT EXISTS last_seen_at DATETIME NULL
+    """)
+
+    op.execute("""
+        UPDATE api_device_tokens
+        SET last_seen_at = registered_at
+        WHERE last_seen_at IS NULL
+    """)
+
+    op.execute("DROP TABLE IF EXISTS device_registrations")
+
+
+def downgrade():
+    op.execute("ALTER TABLE api_device_tokens DROP COLUMN IF EXISTS ios_version")
+    op.execute("ALTER TABLE api_device_tokens DROP COLUMN IF EXISTS last_seen_at")