更新

backend/models/db_migrate.py

@@ -53,12 +53,42 @@ def add_index_if_missing(
     conn.execute(text(f"CREATE INDEX {index_name} ON {table} ({safe_columns})"))
 
 
+def widen_mysql_text_columns(conn, table: str, columns: tuple[str, ...]) -> None:
+    """Upgrade large account payloads from TEXT to LONGTEXT on MySQL.
+
+    SQLite and PostgreSQL TEXT values are not limited to 64 KiB, while MySQL
+    TEXT is. Browser storage_state and full-page QR/captcha screenshots can
+    legitimately exceed that size.
+    """
+    if _dialect(conn) != "mysql":
+        return
+    allowed = {"cookie_data", "im_session_data", "qr_code_base64"}
+    try:
+        reflected = {
+            item["name"]: str(item.get("type") or "").upper()
+            for item in inspect(conn).get_columns(table)
+        }
+    except Exception:
+        return
+    for column in columns:
+        if column not in allowed or column not in reflected:
+            continue
+        if reflected[column] == "LONGTEXT":
+            continue
+        conn.execute(
+            text(f"ALTER TABLE {table} MODIFY COLUMN {column} LONGTEXT NULL")
+        )
+
+
 def migrate_accounts_table(conn) -> None:
     add_column_if_missing(
         conn,
         "accounts",
         "cookie_data",
-        {"default": "ALTER TABLE accounts ADD COLUMN cookie_data TEXT"},
+        {
+            "default": "ALTER TABLE accounts ADD COLUMN cookie_data TEXT",
+            "mysql": "ALTER TABLE accounts ADD COLUMN cookie_data LONGTEXT",
+        },
     )
     add_column_if_missing(
         conn,
@@ -73,7 +103,10 @@ def migrate_accounts_table(conn) -> None:
         conn,
         "accounts",
         "im_session_data",
-        {"default": "ALTER TABLE accounts ADD COLUMN im_session_data TEXT"},
+        {
+            "default": "ALTER TABLE accounts ADD COLUMN im_session_data TEXT",
+            "mysql": "ALTER TABLE accounts ADD COLUMN im_session_data LONGTEXT",
+        },
     )
     add_column_if_missing(
         conn,
@@ -138,6 +171,11 @@ def migrate_accounts_table(conn) -> None:
         "douyin_uid",
         {"default": "ALTER TABLE accounts ADD COLUMN douyin_uid VARCHAR(64)"},
     )
+    widen_mysql_text_columns(
+        conn,
+        "accounts",
+        ("cookie_data", "im_session_data", "qr_code_base64"),
+    )
 
 
 def migrate_account_videos_table(conn) -> None: