Display Data from Another Contract in Solidity

Question

The code compiles well. But it gives the following error, when event LogData is activated. LogAddress works well. Do I have to set up explicit getters for the State Variables?

transact to browser/Test.sol:Factory.getContract errored: VM error: invalid opcode. The constructor should be payable if you send value. The execution might have thrown. Debug the transaction to get more information.

pragma solidity ^0.4.15;

contract TestContract {

    uint public iD;
    bytes32 public name;
    function setAttr(uint _id, bytes32 _name) {
        iD = _id;
        name = _name;
    }
}

contract Factory {

    TestContract myTest;
    address contractAddress;
    function Factory () {
        myTest = new TestContract();
        myTest.setAttr(100,"0x111");
        contractAddress = address(myTest);
    }

    event LogData(uint _mydata, bytes32 _name);
    event LogAddress(address _add);
    function getContract() {
        myTest = TestContract(contractAddress);
        LogAddress(contractAddress);
        LogData(myTest.iD(), myTest.name());
    }

}

Answer 1

I just fiddled with it until it works.

pragma solidity ^0.4.15;

contract TestContract {

  uint public iD;
  bytes32 public name;
  function TestContract(uint _id, bytes32 _name) public {
    iD = _id;
    name = _name;
  }
}

contract Factory {

  TestContract myTest;
  TestContract testContract;
  function Factory () public {
    testContract = new TestContract(100,"0x123");
  }

  event LogData(uint _mydata, bytes32 _name);
  event LogAddress(address _add);
  function getContract() public {
    LogAddress(testContract);
    LogData(testContract.iD(), testContract.name());
  }
}

Hope it helps.