采取行动后如何清空reducer数组

Question

我必须显示用户列表，单击按钮后，我想在按钮内显示文本。 UserHeader是我从记录列表中导入的组件。我意识到的是，一旦单击按钮，动作就会在所有list元素上受到影响，我认为这是因为reducer的状态数组被记录填充，并且每次我显示UserHeader时，它都会在按钮内显示文本。我只想在已经处理的列表元素上显示文本，而不是整个列表。请帮我怎么做。

import React from 'react';
import { connect } from 'react-redux';
import { fetchUser, selectPost } from '../actions';

class UserHeader extends React.Component {

  render() {

      return <button onClick={this.props.selectPost} className="header"> {this.props.select} </button>


  }
}


const mapStateToProps = (state, ownProps) => {
  return {
    select: state.select
   };
}

export default connect(mapStateToProps, { selectPost })(UserHeader);


//Reducer.js

export const Reducer_posts = (state=[], action) => {
  switch (action.type){
    case 'FETCH_POSTS':
      return action.payload
    default:
      return state;
  }

};

export const Reducer_users = (state=[], action) => {
  switch (action.type){
    case 'FETCH_USER':
      return [...state, action.payload];
    default:
      return state;
  }
};

export const Reducer_select = (state=[], action) => {
  switch (action.type){
    case 'SELECT_POST':
      return action.payload;
    default:
      return state;
  }
};