Cant Retrieve the values of Structure fields (i.e. text boxes) through Remix IDE

Question

I am giving the values to structure field through Remix IDE, then I am putting ‘0’ as the index of people array, then I click transact and then I click call, but Remix does not show me the value I gave as input to the structure fields (encircled in blue box). However, previously it worked: Understanding array of structure The code is:

    pragma solidity 0.5.4;
    contract MyContractOwnerAddr {
        uint256 public peopleCount = 0;
        mapping(uint => Person) public people;

        address owner;

        modifier onlyOwner() {
            require(msg.sender == owner);
            _;
        }

        struct Person {
            uint _id;
            string _firstName;
            string _lastName;
        }

        constructor() public {
            owner = msg.sender;
        }

        function addPerson(
            string memory _firstName,
            string memory _lastName)
            public
            onlyOwner
        {
            incrementCount();
            people[peopleCount] = Person(peopleCount, _firstName, _lastName);
        }

        function incrementCount() internal {
            peopleCount += 1;
        }
    }

Some body please guide me.

Zulfi.

Answer 1

The increment people count is added before adding the person to the mapping. So nothing is added to the people[ 1 ] spot in the mapping. As is, the first spot in the mapping that gets filled is people[ 0 ]. Move incrementCount() to after adding the person to the mapping.