How to return a list of user-defined struct in solidity?

Question

I want to return a list of user-defined struct

function sortByEtherValues (string category) public view returns (JobStruct[]) {
...
}

I am getting the following error:

Failed to decode output: Error: Unsupported or invalid type: tuple

Answer 1

Solidity supports returning multiple values:

struct JobStruct {
  uint a;
  uint b;
  uint c;
}

function sortByEtherValues (string category) public view returns (uint, uint, uint) {
  JobStruct memory js = JobStruct(1, 2, 3);
  return (js.a, js.b, js.c);
}

It'll be a little dirty to return an array of structs by decomposing your struct elements. If you can, you should try to return just a single JobStruct by getting the number of elements by category in a separate function, then adding the index to sortByEtherValues.