Solidity: return array in a public method - solidity

Question

I am trying to create a public funcion that returns an array,
this is the error
Return argument type mapping(uint256 => struct ItemList.Item storage
ref) is not implicitly convertible to expected type (type of first
return variable) uint256[] memory.
pragma solidity ^0.5.0;
contract ItemList {
uint public itemCount = 0;
mapping(uint256 => Item) public items;
event ItemCreated (
uint id,
string proofdocument
);
struct Item {
uint id;
string proofdocument;
}
constructor() public {
}
function createItem(string memory _proofdocument) public {
itemCount++;
items[itemCount] = Item(itemCount, _proofdocument);
emit ItemCreated(itemCount, _proofdocument);
}
function getItems() public pure returns(uint256[] memory ) {
return items; <----------ERROR
}
}
Thanks Andrea

Answer 1

You can get every item in the loop via web3.js library
const array = []
for (let i = 0; i < itemCount; itemCount += 1) {
array.push(contract.getItem(i)) // where getItem do items[I] in solidity
}
Or you can use pragma experimental version:
pragma solidity ^0.5.0;
pragma experimental ABIEncoderV2;
contract ItemList {
uint public itemCount = 0;
struct Item {
uint id;
string proofdocument;
}
Item[] items;
constructor() public {}
function createItem(string memory _proofdocument) public {
itemCount++;
items.push(Item(itemCount, _proofdocument));
}
function getItems() external view returns(Item[] memory) {
return items;
}
}