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:

backend/models/models.py

@@ -1,5 +1,6 @@
 from datetime import datetime
 from sqlalchemy import Column, Integer, String, Boolean, DateTime, ForeignKey, Index, Text, UniqueConstraint
+from sqlalchemy.dialects.mysql import LONGTEXT
 from sqlalchemy.orm import relationship, validates
 from .database import Base
 from utils.log_limits import bound_error_log_content, bound_message_log_content
@@ -108,9 +109,9 @@ class Account(Base):
     phone = Column(String(20), nullable=True)                              # 绑定的手机号（可选）
     status = Column(String(50), default="offline")                         # offline, logging_in, online, error
     cookie_path = Column(String(255), nullable=True)                       # 存储 cookie/session 的路径
-    cookie_data = Column(Text, nullable=True)                              # Playwright storage_state JSON
+    cookie_data = Column(Text().with_variant(LONGTEXT(), "mysql"), nullable=True)  # Playwright storage_state JSON
     cookie_updated_at = Column(DateTime, nullable=True)                    # Cookie 最近更新时间
-    im_session_data = Column(Text, nullable=True)                          # IM 直连会话 (WS URL / device_id 等)
+    im_session_data = Column(Text().with_variant(LONGTEXT(), "mysql"), nullable=True)  # IM 直连会话 (WS URL / device_id 等)
     reply_delay_seconds = Column(Integer, default=0)                       # 账号回复排队间隔；0/NULL=继承系统默认
     reply_cooldown_seconds = Column(Integer, nullable=True)                # 自动回复冷却秒数；NULL=继承全局设置
     follow_welcome_enabled = Column(Boolean, default=False)                # 新粉丝关注后自动发送欢迎语
@@ -118,7 +119,7 @@ class Account(Base):
     user_agent = Column(Text, nullable=True)                             # 伪装设备头（User-Agent），空=默认
     egress_public_ip = Column(String(64), nullable=True)                 # 指定公网出口；空=自动选择
     egress_auto_attempts = Column(Integer, nullable=False, default=1)    # 发送失败时最多串行尝试的出口数
-    qr_code_base64 = Column(Text, nullable=True)                           # 当前登录二维码的 base64 字符串
+    qr_code_base64 = Column(Text().with_variant(LONGTEXT(), "mysql"), nullable=True)  # 当前登录二维码的 base64 字符串
     error_message = Column(Text, nullable=True)                            # 错误信息
     quota_disabled = Column(Boolean, default=False, index=True)              # 额度不足被停用
     created_at = Column(DateTime, default=datetime.utcnow)