javascript - 我无法更新我的 postgresql 数据库中的列

Question

import React, { useState } from 'react';


const Quantity = ({ todo }) => {
  const [count, setCount] = useState(+todo.count);
  function decrementCount() {
    setCount(count - 1)
    updateCount(count - 1)
  }

  function incrementCount() {    
   setCount(count + 1)
   updateCount(count + 1)
 }

  // edit count function 

  const updateCount = async (newCount)  => {
    console.log("this is the newCount", newCount)  

  
  try {
     const body = { "newCount" : newCount}
     const response = await fetch(
      `http://localhost:5000/todos/${todo.todo.id}`,
       {
         method: "PUT",
         headers: { "Content-Type": "application/json" },
         body: JSON.stringify(body)
       }
     );
    
  

     window.location = "/";
    } catch (err) {
      console.error(err.message);
       
    }
   }


 return (
  <>
    <button onClick={() => decrementCount(count)}>-</button>
    <span>{count}</span>
    <button onClick= {() => incrementCount(count)}>+</button>
    </> 
  )
  }
  

export default Quantity; 

我无法让我的计数器应用程序更新我的 postgresql 表中的“计数”列，有什么建议吗？我应该更改 todo.todo.id 吗？或者我应该更改返回语句中关于 onclick 的计数？