React - Axios call make too many requests

Question

Im learning React & Redux by making a game project. I want to fetch data (attributes) by API, but it cause too many requests. Guess it can be realted to placing axios call directly in functional react component, but i have no idea how to fix it.

function Attributes({ attributes, dispatch }) {
  axios.get(`/api/heroes/1/get-attributes`).then(res => {
    dispatch(AttribAction.set(objectToArray(res.data)));
  });

  return (
    <div className="content">
      {attributes.map((attrib, index) => (
        <div
          key={index}
          className={attrib.id == null ? "attrib-block empty" : "attrib-block"}
        >
          <p>
            <strong>{attrib.name}</strong>: {attrib.value}
          </p>
          <div>
            <button
              className="attrib-button"
              onClick={() => dispatch(AttribAction.increment(attrib.id))}
            >
              +
            </button>
            <button
              className="attrib-button"
              onClick={() => dispatch(AttribAction.decrement(attrib.id))}
            >
              -
            </button>
          </div>
        </div>
      ))}
    </div>
  );
}

Answer 1

You can use a useEffect hook to run the data fetching.

Passing an empty array as the dependencies means the effect will run only once.

import React, { useEffect } from 'react';

function Attributes({ attributes, dispatch }){

    useEffect(() => {
        axios.get(`/api/heroes/1/get-attributes`)
            .then(res => {
               dispatch(AttribAction.set(objectToArray(res.data)));
            });
    }, [])

    return(
        <div className="content">
            {attributes.map((attrib, index) =>
                <div key={index} className={attrib.id == null ? "attrib-block empty" : "attrib-block"}>
                    <p><strong>{attrib.name}</strong>: {attrib.value}</p>
                    <div>
                        <button className="attrib-button" onClick={() => dispatch(AttribAction.increment(attrib.id))}>+</button>
                        <button className="attrib-button" onClick={() => dispatch(AttribAction.decrement(attrib.id))}>-</button>
                    </div>
                </div>
            )}
        </div>
    );
}