mini-program/app/dao/child.py

@@ -5,9 +5,21 @@ from typing import Optional
 from sqlalchemy import text
 
 from app.dao import BaseDAO
+from app.db_compat import inserted_primary_key
 
 
 class ChildDAO(BaseDAO):
+    def _create_relation(self, user_id: int, child_id: int) -> None:
+        self.db.execute(
+            text(
+                """
+                INSERT INTO parent_child_relations (user_id, child_id, relation_type, is_primary, status)
+                VALUES (:user_id, :child_id, 9, 0, 1)
+                """
+            ),
+            {"user_id": user_id, "child_id": child_id},
+        )
+
     def create(
         self,
         user_id: int,
@@ -18,13 +30,14 @@ class ChildDAO(BaseDAO):
         result = self.db.execute(
             text(
                 """
-                INSERT INTO children (parent_user_id, child_name, child_gender, child_birthday, status)
+                INSERT INTO children (child_name, child_gender, child_birthday, status)
-                VALUES (:user_id, :child_name, :child_gender, :child_birthday, 1)
+                VALUES (:child_name, :child_gender, :child_birthday, 1)
                 """
             ),
-            {"user_id": user_id, "child_name": child_name, "child_gender": child_gender, "child_birthday": child_birthday},
+            {"child_name": child_name, "child_gender": child_gender, "child_birthday": child_birthday},
         )
-        child_id = int(result.lastrowid)
+        child_id = inserted_primary_key(result)
+        self._create_relation(user_id, child_id)
         self.commit()
         return child_id
 
@@ -40,18 +53,21 @@ class ChildDAO(BaseDAO):
 
     def list_by_parent(self, user_id: int, limit: int = 20, cursor: int = None) -> list[Mapping]:
         params = {"user_id": user_id, "limit": limit + 1}
-        where = "parent_user_id = :user_id AND status = 1"
+        where = "pcr.user_id = :user_id AND pcr.status = 1 AND c.status = 1"
-        if cursor:
+        if cursor is not None:
-            where += " AND child_id < :cursor"
+            where += " AND c.child_id < :cursor"
             params["cursor"] = cursor
 
         rows = (
             self.db.execute(
                 text(
                     f"""
-                    SELECT * FROM children
+                    SELECT c.*
+                    FROM children AS c
+                    JOIN parent_child_relations AS pcr
+                      ON pcr.child_id = c.child_id
                     WHERE {where}
-                    ORDER BY child_id DESC
+                    ORDER BY c.child_id DESC
                     LIMIT :limit
                     """
                 ),
@@ -87,7 +103,16 @@ class ChildDAO(BaseDAO):
         return (
             self.db.execute(
                 text(
-                    "SELECT 1 FROM children WHERE child_id = :child_id AND parent_user_id = :user_id AND status = 1"
+                    """
+                    SELECT 1
+                    FROM children AS c
+                    JOIN parent_child_relations AS pcr
+                      ON pcr.child_id = c.child_id
+                    WHERE c.child_id = :child_id
+                      AND pcr.user_id = :user_id
+                      AND c.status = 1
+                      AND pcr.status = 1
+                    """
                 ),
                 {"child_id": child_id, "user_id": user_id},
             ).scalar_one_or_none()

mini-program/app/db_compat.py

@@ -0,0 +1,41 @@
+from collections.abc import Sequence
+from typing import Any
+
+from sqlalchemy.orm import Session
+
+
+def get_db_dialect_name(db: Session) -> str:
+    bind = db.get_bind()
+    if bind is None:
+        raise RuntimeError("Database session is not bound to an engine")
+    return bind.dialect.name
+
+
+def current_timestamp_sql(db: Session) -> str:
+    if get_db_dialect_name(db) == "mysql":
+        return "CURRENT_TIMESTAMP(3)"
+    return "CURRENT_TIMESTAMP"
+
+
+def select_for_update_clause(db: Session) -> str:
+    if get_db_dialect_name(db) == "mysql":
+        return " FOR UPDATE"
+    return ""
+
+
+def inserted_primary_key(result: Any) -> int:
+    lastrowid = getattr(result, "lastrowid", None)
+    if lastrowid is not None:
+        return int(lastrowid)
+
+    try:
+        inserted_primary_key = result.inserted_primary_key
+    except Exception:
+        inserted_primary_key = None
+
+    if isinstance(inserted_primary_key, Sequence) and inserted_primary_key:
+        primary_key = inserted_primary_key[0]
+        if primary_key is not None:
+            return int(primary_key)
+
+    raise RuntimeError("Could not determine inserted primary key")

mini-program/app/main.py

@@ -1,35 +1,29 @@
 import os
 import logging
+import sys
+from pathlib import Path
 
 from fastapi import FastAPI
 
-try:
+if __package__ in (None, ""):
-    # For module mode: `uvicorn app.main:app`
+    # Make `python app/main.py` behave like module execution from the project root.
-    from app.db import check_db_connection, close_db_engine, init_db_tables
+    project_root = Path(__file__).resolve().parent.parent
-    from app.logging_setup import configure_logging
+    project_root_str = str(project_root)
-    from app.middleware.auth import install_auth_middleware
+    if project_root_str not in sys.path:
-    from app.middleware.request_log import install_request_logging_middleware
+        sys.path.insert(0, project_root_str)
-    from app.routers.auth import router as auth_router
+
-    from app.routers.wechat_auth import router as wechat_auth_router
+from app.db import check_db_connection, close_db_engine, init_db_tables
-    from app.routers.health import router as health_router
+from app.logging_setup import configure_logging
-    from app.routers.messages import router as messages_router
+from app.middleware.auth import install_auth_middleware
-    from app.routers.parents import router as parents_router
+from app.middleware.request_log import install_request_logging_middleware
-    from app.routers.children import router as children_router
+from app.routers.auth import router as auth_router
-    from app.routers.bindings import router as bindings_router
+from app.routers.wechat_auth import router as wechat_auth_router
-    from app.settings import settings
+from app.routers.health import router as health_router
-except ModuleNotFoundError:
+from app.routers.messages import router as messages_router
-    # For script mode: `python app/main.py` or VS Code "Run Python File"
+from app.routers.parents import router as parents_router
-    from db import check_db_connection, close_db_engine, init_db_tables
+from app.routers.children import router as children_router
-    from logging_setup import configure_logging
+from app.routers.bindings import router as bindings_router
-    from middleware.auth import install_auth_middleware
+from app.settings import settings
-    from middleware.request_log import install_request_logging_middleware
-    from routers.auth import router as auth_router
-    from routers.health import router as health_router
-    from routers.messages import router as messages_router
-    from routers.parents import router as parents_router
-    from routers.children import router as children_router
-    from routers.bindings import router as bindings_router
-    from settings import settings
 
 
 configure_logging()
@@ -59,12 +53,9 @@ def create_app() -> FastAPI:
     app.include_router(wechat_auth_router)
     app.include_router(health_router)
     app.include_router(messages_router)
-    try:
+    app.include_router(parents_router)
-        app.include_router(parents_router)
+    app.include_router(children_router)
-        app.include_router(children_router)
+    app.include_router(bindings_router)
-        app.include_router(bindings_router)
-    except NameError:
-        pass
     return app
 
 

mini-program/app/routers/auth.py

@@ -8,11 +8,13 @@ from sqlalchemy.orm import Session
 try:
     # For module mode: `uvicorn app.main:app`
     from app.db import get_db
+    from app.db_compat import current_timestamp_sql
     from app.schemas.auth import LoginRequest, LoginResponse
     from app.security import create_access_token
 except ModuleNotFoundError:
     # For script mode: `python app/main.py` or VS Code "Run Python File"
     from db import get_db
+    from db_compat import current_timestamp_sql
     from schemas.auth import LoginRequest, LoginResponse
     from security import create_access_token
 
@@ -34,6 +36,7 @@ def login(
     db: Session = Depends(get_db),
 ) -> LoginResponse:
     username_masked = _mask_username(payload.username)
+    now_sql = current_timestamp_sql(db)
     with db.begin():
         row = (
             db.execute(
@@ -107,10 +110,10 @@ def login(
 
         db.execute(
             text(
-                """
+                f"""
                 UPDATE chat_user_auth
-                SET last_login_at = CURRENT_TIMESTAMP(3),
+                SET last_login_at = {now_sql},
-                    updated_at = CURRENT_TIMESTAMP(3)
+                    updated_at = {now_sql}
                 WHERE id = :user_auth_id
                 """
             ),
@@ -118,10 +121,10 @@ def login(
         )
         db.execute(
             text(
-                """
+                f"""
                 UPDATE chat_user
-                SET last_login_at = CURRENT_TIMESTAMP(3),
+                SET last_login_at = {now_sql},
-                    updated_at = CURRENT_TIMESTAMP(3)
+                    updated_at = {now_sql}
                 WHERE id = :user_id
                 """
             ),