如何設置結構內部的映射值？

April 30, 2022

我已經嘗試了一些方法，但它不起作用，並且在網際網路上得到了任何有效的例子。

struct customerId{
       address id;
       mapping(string=&gt;uint) customerAmount;
       mapping(string=&gt;uint) customerPayed; 
       bytes customer_address;
   }
function add() public { 
cosId memory a= cosId({
           id:msg.sender,
           cosAmount:123,
           cosPayed:123,
           customer_address:"abcd"
       });
}

如果您使用的是儲存customerId結構的映射，您可以看到這個智能合約範例：

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

contract Test {

   struct customerId{
       address id;
       mapping(string=&gt;uint) customerAmount;
       mapping(string=&gt;uint) customerPayed; 
       bytes customer_address;
   }

   mapping(address=&gt;customerId) _arrayCustomerId;

   function add() public {
       customerId storage customer = _arrayCustomerId[msg.sender];
       customer.id = address(msg.sender);
       customer.customerAmount["test"] = 1;
       customer.customerPayed["test1"] = 2;
       customer.customer_address = abi.encodePacked(msg.sender);
   }

   function getElement() external view returns(address, uint, uint, bytes memory){
       return (_arrayCustomerId[msg.sender].id, _arrayCustomerId[msg.sender].customerAmount["test"], _arrayCustomerId[msg.sender].customerPayed["test1"], _arrayCustomerId[msg.sender].customer_address);
   }

}