Jun 26 update to the latest codes

migrations/versions/phase32_device_token_columns.py

@@ -0,0 +1,66 @@
+"""phase32 — add ios_version and last_seen_at to api_device_tokens
+
+phase31 recorded as applied but ALTER statements never executed.
+Uses INFORMATION_SCHEMA column-existence checks — safe on MySQL 5.7+.
+Also drops the orphaned device_registrations table from phase30 if present.
+"""
+
+revision      = 'phase32_device_token_columns'
+down_revision = 'phase31_device_registry'
+branch_labels = None
+depends_on    = None
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def _column_exists(conn, table, column):
+    result = conn.execute(sa.text(
+        "SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS "
+        "WHERE TABLE_SCHEMA = DATABASE() "
+        "AND TABLE_NAME = :t AND COLUMN_NAME = :c"
+    ), {"t": table, "c": column})
+    return result.scalar() > 0
+
+
+def _table_exists(conn, table):
+    result = conn.execute(sa.text(
+        "SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES "
+        "WHERE TABLE_SCHEMA = DATABASE() AND TABLE_NAME = :t"
+    ), {"t": table})
+    return result.scalar() > 0
+
+
+def upgrade():
+    bind = op.get_bind()
+
+    if not _column_exists(bind, 'api_device_tokens', 'ios_version'):
+        op.execute(sa.text(
+            "ALTER TABLE api_device_tokens ADD COLUMN ios_version VARCHAR(20) NULL"
+        ))
+
+    if not _column_exists(bind, 'api_device_tokens', 'last_seen_at'):
+        op.execute(sa.text(
+            "ALTER TABLE api_device_tokens ADD COLUMN last_seen_at DATETIME NULL"
+        ))
+
+    op.execute(sa.text(
+        "UPDATE api_device_tokens SET last_seen_at = registered_at WHERE last_seen_at IS NULL"
+    ))
+
+    if _table_exists(bind, 'device_registrations'):
+        op.execute(sa.text("DROP TABLE device_registrations"))
+
+
+def downgrade():
+    bind = op.get_bind()
+
+    if _column_exists(bind, 'api_device_tokens', 'ios_version'):
+        op.execute(sa.text(
+            "ALTER TABLE api_device_tokens DROP COLUMN ios_version"
+        ))
+
+    if _column_exists(bind, 'api_device_tokens', 'last_seen_at'):
+        op.execute(sa.text(
+            "ALTER TABLE api_device_tokens DROP COLUMN last_seen_at"
+        ))