新增用户配置相关能力和接口

app/db/models/__init__.py

@@ -7,3 +7,4 @@ from .subscribe import Subscribe
 from .systemconfig import SystemConfig
 from .transferhistory import TransferHistory
 from .user import User
+from .userconfig import UserConfig

app/db/models/userconfig.py

@@ -0,0 +1,38 @@
+from sqlalchemy import Column, Integer, String, Sequence, UniqueConstraint, Index
+from sqlalchemy.orm import Session
+
+from app.db import db_query, db_update, Base
+
+
+class UserConfig(Base):
+    """
+    用户配置表
+    """
+    id = Column(Integer, Sequence('id'), primary_key=True, index=True)
+    # 用户ID
+    user_id = Column(Integer, index=True)
+    # 配置键
+    key = Column(String)
+    # 值
+    value = Column(String, nullable=True)
+
+    __table_args__ = (
+        # 用户ID和配置键联合唯一
+        UniqueConstraint('user_id', 'key'),
+        Index('ix_userconfig_userid_key', 'user_id', 'key'),
+    )
+
+    @staticmethod
+    @db_query
+    def get_by_key(db: Session, user_id: int, key: str):
+        return db.query(UserConfig) \
+                 .filter(UserConfig.user_id == user_id) \
+                 .filter(UserConfig.key == key) \
+                 .first()
+
+    @db_update
+    def delete_by_key(self, db: Session, user_id: int, key: str):
+        userconfig = self.get_by_key(db, user_id, key)
+        if userconfig:
+            userconfig.delete(db, userconfig.id)
+        return True