Ethereum 如何从truffle控制台读取struct中的字段?
我有一个简单的托多利斯特智能合约看起来像这样Ethereum 如何从truffle控制台读取struct中的字段?,ethereum,solidity,smartcontracts,truffle,Ethereum,Solidity,Smartcontracts,Truffle,我有一个简单的托多利斯特智能合约看起来像这样 pragma solidity ^0.8.0; contract TodoList { uint256 public taskCount = 0; struct Task { uint256 id; string content; bool completed; } mapping(uint256 => Task) public tasks; co
pragma solidity ^0.8.0;
contract TodoList {
uint256 public taskCount = 0;
struct Task {
uint256 id;
string content;
bool completed;
}
mapping(uint256 => Task) public tasks;
constructor(){
createTask("Buy Keyboard");
}
function createTask(string memory _content) public {
taskCount++;
tasks[taskCount] = Task(taskCount, _content, false);
}
}
我想读取第一个todo的id,但无论我如何尝试,它都显示为未定义?这里的正确方法是什么?
您可以等待承诺,然后分配值:
>> task.then(data => { id = + data["id"] } )
>> id
您可以等待承诺,然后分配值:
>> task.then(data => { id = + data["id"] } )
>> id