Warning: PropType Error: Invalid hint of type `array` expected` object` with React

Question

So this line of code throws something like 'Failed propType: Invalid prop of type arrayexpected object.'

Why is this happening?

Here is my JSON:

"student_records": [
      {
        "program": "PSCI-210",
        "grade": 80
      }
    ]

JSX:

import React, { PropTypes } from 'react';


const StudentRecordPropTypes = {
  studentRecordData: PropTypes.object.isRequired,
};

function StudentRecord(props) {
    const Records = props.studentRecordData;


  return (
    <div>
        {(Records || []).map(student_records => (
              <ul>
                    <li>{student_records.program} : {student_records.grade} </li>
              </ul>
            ))}
    </div>
  );
}
StudentRecord.propTypes = StudentRecordPropTypes;

export default StudentRecord;

It is displayed correctly. After some googling, I realized that it was looking at an array, but its infact object. My problem is that I do not know how to fix it. How to remove this error?

Answer 1

Edit

const StudentRecordPropTypes = {
  studentRecordData: PropTypes.object.isRequired,
};

to

const StudentRecordPropTypes = {
  studentRecordData: PropTypes.array.isRequired,
};