Jul 16 - Update issue handler Janitorial staff - add input staff name

migrations/versions/phase41_internal_handler_name.py

@@ -0,0 +1,40 @@
+"""phase41 — issue internal_handler_name
+
+Adds a free-text `internal_handler_name` to `issues`, capturing the name of the
+janitorial staff member who will handle an issue when handler_type == 'internal'.
+Distinct from `assigned_to` (the JQC User who owns follow-up) — the actual crew
+member may not be a system user.
+
+Uses an INFORMATION_SCHEMA column-existence check — safe to re-run.
+"""
+
+revision      = 'phase41_internal_handler'
+down_revision = 'phase40_auditor_role'
+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 upgrade():
+    bind = op.get_bind()
+    if not _column_exists(bind, 'issues', 'internal_handler_name'):
+        op.execute(sa.text(
+            "ALTER TABLE issues ADD COLUMN internal_handler_name VARCHAR(100) NULL"
+        ))
+
+
+def downgrade():
+    bind = op.get_bind()
+    if _column_exists(bind, 'issues', 'internal_handler_name'):
+        op.execute(sa.text("ALTER TABLE issues DROP COLUMN internal_handler_name"))