Solidity function returns empty array to web3.js

Question

Solidity function returns a array of string while executed on Remix as well as truffle console while it returns a empty array when called from JS

Solidity code

mapping(address => string[]) addressLink;
function getLinks(address a) public view returns (string[] memory)
  {
    return addressLink[a];
  }

JS code

contract.methods.getLinks(accounts[0]).call().then(res => {
                 console.log(res)
             });

truffle console result and expected results when called from JS

[ 'QmTiMLN8X4NE4ho5mqJ9t4bJ17JxfMHAFcg3z66f8vdUh1' ]

Result on browser console(Actual result)

[""]
0: ""
length: 1

if the contract is local? are you sure you already set the string before getting it from web3js? — Abdullah Aziz
Yes the contact is local. I have set the string through web3 and tried to retrieve from console at first which gives the expected result and when called from web3 it returns a empty array — Shivansh Nathani
can you show the complete code? I need to see how you are getting contract from web3. — Abdullah Aziz
cant paste the complete code here. Snippet of getting instance pastebin.com/mrjEmRmm — Shivansh Nathani

Peter Lai Peter Lai · Accepted Answer · 2019-03-26T03:41:52

You might set the wrong contract address in your javascript code:

 const instance = new web3.eth.Contract(
  SimpleStorageContract.abi,
  deployedNetwork && deployedNetwork.address,
 );

Hope it helps.