Ruby on rails 无法加载XMLHttpRequesthttp://localhost:3000/players/1. 飞行前的响应具有无效的HTTP状态代码404

我正在用rails api构建react本机应用程序。我有一个带有创建、索引和更新操作的players\u控制器。我可以从邮递员那里做所有的事情（创建、索引、更新）。但当我尝试从react action获取表单请求时。我只能索引和创建玩家模型。更新时，我在调试器控制台中遇到此错误

:3000/players/1:1 OPTIONS http://localhost:3000/players/1
XMLHttpRequest cannot load http://localhost:3000/players/1. Response 
for preflight has invalid HTTP status code 404

在Rails my players_controller.rb中

class PlayersController < ApplicationController
 skip_before_action :verify_authenticity_token
 respond_to :json
 def index
  @players = Player.find_by(player_id: params[:player_id])
  player = Player.all
  render json: @players
 end
def create
  player = Player.new(player_params)
  if player.save
    render json: player, status: 201
  else
  render json: { errors: player.errors }, status: 422
  end
end

def update
 player = Player.find(params[:id])
 player.update(player_params)
 if player.save
   render json: player, status: 201
 else
 render json: { errors: player.errors }, status: 422
 end
end

private

def player_params
 params.require(:player).permit(:username, :profile_pic, :player_id)
end
end

---

它需要查看您的roues.rb文件，但也可能需要添加 宝石“机架cors” 并设置它

Rails.application.config.middleware.insert_在0之前，Rack:：Cors do
允许做
起源“*”
资源“*”，
标题：：任何，
方法：[：获取，：发布，：放置，：修补，：删除，：选项，：头]
结束
结束

---

请在

config/initializers/cors.rb

中发布您的routes.rb

export const profilePicUpdate = (player, profile) => (dispatch) => {
const obj = player;
obj.profile_pic = profile;
fetch(`http://localhost:3000/players/${player.id}`, {
  method: 'PATCH',
  headers: {
    Accept: 'application/json',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    obj
  })
}).then(() => {
  dispatch({
    type: 'PROFILE_PIC_UPDATE',
    payload: profile
  });
  NavigatorService.navigate('Profile');
}).catch((error) => {
  console.log('Error', error);
});
};