Mai*_*007 6 javascript php fetch postman lumen
我遇到了一个问题,我已经工作了几天,找不到解决方案。我使用Lumen创建了一个API,并使用ReactJS创建了一个前端。这对于GET请求来说一切正常,但是在我发送POST请求时失败。由于某些奇怪的原因,当我与Postman发送请求时,请求可以正常工作。现在一些代码!
首先,发送请求的JS脚本:
import moment from 'moment';
import React, {Component} from 'react';
import { Modal, Form, Button, Input, DatePicker, Select, message } from 'antd';
const {RangePicker} = DatePicker;
const FormItem = Form.Item;
const Option = Select.Option;
const api_url = 'api/v1/';
class NewEventForm extends React.Component {
constructor(props) {
super(props);
this.state = {
confirmLoading: false,
categories: []
};
this.onCreate = this.onCreate.bind(this);
this.onCancel = this.onCancel.bind(this);
}
componentDidMount() {
fetch(api_url + 'category')
.then(results => {
return results.json();
}).then(data => {
let categories = data.map((cat) => {
return (
<Option key={cat.id} value={cat.id}>{cat.name}</Option>
);
});
this.setState({categories: categories});
});
}
updateStates() {
this.props.updateState();
this.setState({confirmLoading: false});
}
onCreate() {
this.props.form.validateFields((err, values) => {
this.setState({
confirmLoading: true
});
if (err) {
this.setState({
confirmLoading: false
});
return;
}
let event = {
title: values.title,
description: values.description,
start_time: values.date[0],
end_time: values.date[1],
category_id: values.category
};
fetch(api_url + 'event', {
method: 'POST',
/* headers are important*/
headers: {
"content-type":"application/json",
"cache-control":"no-cache",
"accept":"*/*",
},
body: JSON.stringify(event)
}).then(response => {
if(response.ok) {
return response.json();
}
throw new Error("Antwort der API war nicht 'Ok'!");
}).then(data =>{
this.updateStates();
message.success('Das Ereignis wurde erfolgreich eingetragen!');
}).catch(error => {
//console.log(error);
this.updateStates();
message.error('Das Ereignis wurde nicht erstellt. Bitte versuche es später nochmal!');
});
});
}
onCancel(e) {
e.preventDefault();
this.updateStates();
}
render() {
const {getFieldDecorator, getFieldError} = this.props.form;
return(
<Modal title="Neue Veranstaltung hinzufügen" okText="Eintragen" confirmLoading={this.state.confirmLoading} visible={this.props.visible} onOk={this.onCreate} onCancel={this.onCancel}>
<Form layout="vertical">
<FormItem label="Titel">
{getFieldDecorator('title', {
rules: [{required: true, message: 'Bitte einen Titel angeben!' }],
})(
<Input />
)}
</FormItem>
<FormItem label="Beschreibung">
{getFieldDecorator('description')(<Input type="textarea" />)}
</FormItem>
<FormItem label="Kategorie">
{getFieldDecorator('category', {
rules: [{required: true, message: 'Bitte einen Kategorie auswählen!' }],
})(
<Select placeholder="Kategorie auswählen...">
{this.state.categories}
</Select>
)}
</FormItem>
<FormItem label="Zeitraum" className="collection-create-formlast-form-item">
{getFieldDecorator('date', {
rules: [{required: true, message: 'Bitte einen Zeitraum auswählen!' }],
})(
<RangePicker
showTime={{
hideDisabledOptions: true,
defaultValue: [moment('00:00', 'HH:mm'), moment('00:00', 'HH:mm')],
format: 'HH:mm'
}}
format="DD.MM.YYYY HH:mm"
/>
)}
</FormItem>
</Form>
</Modal>
);
}
}
export const NewEventModal = Form.create()(NewEventForm);Run Code Online (Sandbox Code Playgroud)
我的数据库有三个模型。事件,类别和用户:Category.id <--- 1:n ---> Event.category_id || Event.updated_by <--- n:1 ---> User.id
现在,EventController:
<?php
namespace App\Http\Controllers;
use App\Event;
use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
class EventController extends Controller{
public function index(){
$Events = Event::all();
return response()->json($Events);
}
public function getEvent($id){
$Event = Event::with(['category', 'user'])->find($id);
return response()->json($Event);
}
public function createEvent(Request $request){
$User = \App\User::find(1);
$Category = \App\Category::find(1);
$Event = new Event;
$Event->fill($request->all());
$Event->user()->associate($User);
$Event->category()->associate($Category);
$obj = '';
foreach ($request->all() as $key => $value) {
$obj .= '[' . $key . '] => "' . $value . '"; ';
}
\Log::warning('Test: ' . $obj);
$Event->save();
return response()->json($request);
}
public function deleteEvent($id){
$Event = Event::find($id);
$Event->delete();
return response()->json('deleted');
}
public function updateEvent(Request $request,$id){
$Event = Event::find($id);
$Event->title = $request->input('title');
$Event->description = $request->input('description');
$Event->start_time = $request->input('start_time');
$Event->end_time = $request->input('end_time');
$Event->save();
return response()->json($Event);
}
}
Run Code Online (Sandbox Code Playgroud)
和EventModel:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Event extends Model
{
/**
* The attributes that are mass assignable.
*
* @var array
*/
protected $fillable = ['title', 'description', 'start_time', 'end_time'];
public function user() {
return $this->belongsTo('App\User', 'updated_by');
}
public function category() {
return $this->belongsTo('App\Category');
}
}
Run Code Online (Sandbox Code Playgroud)
就像我说的那样,当我使用Postman发送POST请求时,一切都按预期工作了。但是通过我的fetch()函数,我得到了200个响应,但是在数据库中仅填充了“ created_at”和“ updated_at”,其余的只是一个空字符串。显示EventController中的Log语句,这似乎是Request对象为空。但是在Firefox-developer工具中,我看到数据是在请求正文中发送的。
有什么想法吗?如果需要,我还可以发送其他代码文件。
谢谢大家已经为您提供帮助Marco
编辑:不太明显,API和Frontend都在同一主机上运行;本地主机:8000,所以它不是CORS问题。我首先在localhost:8080上运行Frontend,但通过在同一服务器上同时运行它们来消除了这种情况。
正如所料,当没有人真正能够直接回答我的问题时,我的错误并不明显。今天我和一个朋友认识到,我实际发送的请求与我在代码中编写的不同。经过更多搜索,我发现我的 webpack.config 在某种程度上配置错误,并将代码发布到了错误的目录中。但由于已经有一个“旧的”js 文件,该页面看起来正确,但没有我的 API 调用的更改。
TL;DR 请注意,所有内容都位于您需要的地方,然后上面的代码就是正确的:-)