stack - CompilerError : Stack too deep, 尝试删除局部变量

Question

我正在尝试做一个 dapp 项目。

我有一个堆栈太深的错误，但我不知道如何解决这个问题。

CompilerError: Stack too deep, try removing local variables.--> contracts/proje.sol:145:5:|145 | function addRecord(address _addr, s ... gedOn, string memory ipfs) public {| ^ (Relevant source part starts here and spans across multiple lines).

而且实际上，struct 将包含比现在更多的数据。如果这样给出的数据个数有误，那么当我们要输入太多数据的时候怎么办？

contract Patient is Clinic {
    uint256 public p_index = 0;

    struct Records {
        string cname;

        string l_cadence;
        string r_cadence;
        string n_cadence;

        string l_dsupport;
        string r_dsupport;
        string n_dsupport;

        string l_footoff;
        string r_footoff;
        string n_footoff;

        string l_steptime;
        string r_steptime;
        string n_steptime;


        string admittedOn;
        string dischargedOn;
        string ipfs;
    }

    struct patient {
        uint256 id;
        string name;
        string phone;
        string gender;
        string dob;
        string bloodgroup;
        string allergies;
        Records[] records;
        address addr;
    }

    address[] private patientList;
    mapping(address => mapping(address=>bool)) isAuth;
    mapping(address=>patient) patients;
    mapping(address=>bool) isPatient;

    function addRecord(address _addr, string memory cname, string memory l_cadence, string memory r_cadence, string memory n_cadence, string memory l_dsupport, string memory r_dsupport, string memory n_dsupport, string memory l_footoff, string memory r_footoff, string memory n_footoff, string memory l_steptime, string memory r_steptime, string memory n_steptime, string memory admittedOn, string memory dischargedOn, string memory ipfs) public {
        
    }
}

Answer 1

编译器错误是关于 addRecord() 函数的参数数量。要解决这个问题，可以直接使用 Records struct 这样:

function addRecord(address _addr, Records memory record) public {
    // your logic    
}

解决这个问题的另一种选择是将类型函数从公共(public)更改为内部，例如:

function addRecord(address _addr, string memory cname, string memory l_cadence, string memory r_cadence, string memory n_cadence, string memory l_dsupport,
     string memory r_dsupport, string memory n_dsupport, string memory l_footoff, string memory r_footoff, string memory n_footoff, string memory l_steptime, 
     string memory r_steptime, string memory n_steptime, string memory admittedOn, string memory dischargedOn, string memory ipfs) internal {
        // your logic
    }

注意:在进行此修改之前，请查看公共(public)类型函数和内部类型函数之间的区别 here .