src.setCcc("333");

        final MyClass2 dest = new MyClass2();
        dest.setAaa("aaa");
        dest.setBbb("bbb");
        dest.setDdd("ddd");

        BeanUtil.copyBeanToBean(src, dest);
        assertThat(dest.getAaa(), is("111"));
        assertThat(dest.getBbb(), is(nullValue()));
        assertThat(dest.getDdd(), is("ddd"));
    }

    /**
     * @throws Exception
     */
    @Test

         * @return String
         */
        public String getAaa() {
            return null;
        }

        /**
         * @param a
         * @return String
         */
        public String getBbb(final Object a) {
            return null;
        }

        /**
         * @return boolean
         */
        public boolean isCCC() {
            return true;
        }

        /**

         */
        public String getAaa() {
            return null;
        }

        /**
         * @param a
         * @return String
         */
        public String getBbb(final Object a) {
            return null;
        }

        /**
         * @return boolean
         */
        public boolean isCCC() {
            return true;
        }

        /**

         */
        public String getAaa() {
            return aaa;
        }

        /**
         * @param a
         * @return String
         */
        public String getBbb(final Object a) {
            return null;
        }

        /**
         * @return boolean
         */
        public boolean isCCC() {
            return true;
        }

        /**

router_b = APIRouter(route_class=APIRouteB)
router_c = APIRouter(route_class=APIRouteC)


@router_a.get("/")
def get_a():
    return {"msg": "A"}


@router_b.get("/")
def get_b():
    return {"msg": "B"}


@router_c.get("/")
def get_c():
    return {"msg": "C"}


router_b.include_router(router=router_c, prefix="/c")
router_a.include_router(router=router_b, prefix="/b")

```

⤴️ 👥 🔜 📣 *➡ 🛠️ 🔢* & 🔗 🍵 `async def`, ⏮️ 😐 `def`,:

```Python hl_lines="2"
@app.get("/users/{user_id}", response_model=schemas.User)
def read_user(user_id: int, db: Session = Depends(get_db)):
    db_user = crud.get_user(db, user_id=user_id)
    ...
```

/// info

🚥 👆 💪 🔗 👆 🔗 💽 🔁, 👀 [🔁 🗄 (🔗) 💽](../advanced/async-sql-databases.md){.internal-link target=_blank}.

///

```

然后我们应该声明*路径操作函数*和不带 的依赖关系`async def`，只需使用普通的`def`，如下：

```Python hl_lines="2"
@app.get("/users/{user_id}", response_model=schemas.User)
def read_user(user_id: int, db: Session = Depends(get_db)):
    db_user = crud.get_user(db, user_id=user_id)
    ...
```

/// info

如果您需要异步连接到关系数据库，请参阅[Async SQL (Relational) Databases](https://fastapi.tiangolo.com/zh/advanced/async-sql-databases/)

///

HSPLkotlinx/coroutines/JobCancellingNode;-><init>()V
HSPLkotlinx/coroutines/JobImpl;-><init>(Lkotlinx/coroutines/Job;)V
HSPLkotlinx/coroutines/JobNode;-><init>()V
HSPLkotlinx/coroutines/JobNode;->dispose()V
HSPLkotlinx/coroutines/JobNode;->getJob()Lkotlinx/coroutines/JobSupport;
HSPLkotlinx/coroutines/JobNode;->getList()Lkotlinx/coroutines/NodeList;

* Make sure the `*` in short features in the docs is consistent (after `.`) in all languages. PR [#1424](https://github.com/tiangolo/fastapi/pull/1424).
* Update order of execution for `get_db` in SQLAlchemy tutorial. PR [#1293](https://github.com/tiangolo/fastapi/pull/1293) by [@bcb](https://github.com/bcb).
* Fix typos in Async docs. PR [#1423](https://github.com/tiangolo/fastapi/pull/1423).

## 0.54.2

BAAA,QEEF,aAAA,QbQI,WAAA,KNJJ,2BmBAE,MAAA,KFNA,iBAAA,QEQA,aAAA,QAGF,2BAAA,2BAEE,MAAA,KFbA,iBAAA,QEeA,aAAA,QbLE,WAAA,EAAA,EAAA,EAAA,EAAA,qBaeJ,8BAAA,8BAEE,MAAA,KACA,iBAAA,QACA,aAAA,QAOF,0DAAA,0DtBkn/BF,2CsB/m/BI,MAAA,KACA,iBAAA,QAIA,aAAA,QAEA,gEAAA,gEtB+m/BJ,iDsB1m/BQ,WAAA,EAAA,EAAA,EAAA,EAAA,qBwDnDJ,gCxD0DF,MAAA,QACA,aAAA,QnBrDA,sCmBwDE,MAAA,KACA,iBAAA,QACA,aAAA,QAGF,sCAAA,sCAEE,WAAA,EAAA,EAAA,EAAA,EAAA,oBAGF,yCAAA,yCAEE,MAAA,QACA,iBAAA,YAGF,qEAAA,qEtBwm/BF,sDsBrm/BI,MAAA,KACA,iBAAA,QACA,aAAA,QA...