Merge pull request #1523 from jamiecounsell/fix/mysql-json-contains

Fix MySQL json_contains Error by Converting Non-String Values to JSON Strings

backend/utils/database.py

@@ -1,3 +1,4 @@
+import json
 from typing import Any
 
 import sqlalchemy as sa
@@ -15,6 +16,10 @@ def is_postgresql(conn: sa.Connection) -> bool:
     return conn.engine.name == "postgresql"
 
 
+def is_mysql(conn: sa.Connection) -> bool:
+    return conn.engine.name == "mysql"
+
+
 def json_array_contains_value(
     column: sa.Column, value: Any, *, session: Session
 ) -> ColumnElement:
@@ -28,6 +33,9 @@ def json_array_contains_value(
         return sa.type_coerce(column, sa_pg.JSONB).contains(
             func.cast(value, sa_pg.JSONB)
         )
+    elif is_mysql(conn):
+        # In MySQL, JSON.contains() requires a JSON-formatted string (even if it's an int)
+        return func.json_contains(column, json.dumps(value))
     return func.json_contains(column, value)