reactjs - 无法从反应方法发送 POST 请求
问题描述
我正在用 Django 创建一个类似 FB 的应用程序并做出反应。在主页上有一个提要,用户可以在其中创建帖子并将其发布到提要中。
我正在尝试实现删除帖子功能,但遇到了一些困难。
逻辑是:用户单击帖子上的删除按钮,浏览器向服务器发送 XMLHttpeRequest 以删除该帖子。
这是反应组件:
class Feed extends React.Component {
constructor(props){
super(props);
this.state = {
profile_pic: profile_pic_url,
user: username,
posts: posts_from_server,
}
}
handleClick() {
const text = document.querySelector('#new_post_text').value;
if (text.length > 1) {
const data = {author: username, text: text}
// send that post to the server to save it
const csrftoken = Cookies.get('csrftoken');
const request = new XMLHttpRequest();
request.open('POST', '/create_new_post', true);
request.setRequestHeader('X-CSRFToken', csrftoken);
request.setRequestHeader("Content-Type", "text/plain;charset=UTF-8");
request.onload = () => {
const response = JSON.parse(request.responseText)
this.setState({
posts : [{author: response.author, author_picture: profile_pic_url, text: response.text, date: response.date}, ...this.state.posts]
})
document.querySelector("#new_post_text").value = '';
console.log(response)
}
request.send(JSON.stringify(data))
}
}
deletePost(post_id, author) {
const post = document.getElementById(post_id)
post.style.animationPlayState = 'running';
setTimeout(() =>{
this.setState({
posts: this.state.posts.filter(post => post.id != post_id)
})
}, 1000)
// delete the post from the server
const data = {'post_author': author, 'id': post_id}
const csrftoken = Cookies.get('csrftoken');
const request = new XMLHttpRequest();
request.open('POST', '/delete_post', true);
request.setRequestHeader('X-CSRFToken', csrftoken);
request.setRequestHeader("Content-Type", "text/plain;charset=UTF-8");
request.onload = () => {
response = JSON.parse(request.responseText);
console.log(response)
}
request.send(JSON.stringify(data))
}
render() {
return (
<div>
<Post_generator
current_user={this.state.user}
picture={this.state.profile_pic}
onClick={() => this.handleClick()} />
{this.state.posts.map(post => <Post
onClick={() => this.deletePost(post.id, post.author)}
key={post.id}
post_id={post.id}
current_user={this.state.user}
user={post.author}
profile_pic={post.author_picture}
text={post.text}
date={post.date}
/>)}
</div>
)
}
}
这是 urls.py:
from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name='login'),
path('login', views.login_view, name='login'),
path('index', views.index, name='index'),
path('register', views.register_view, name='register'),
path('logout', views.logout_view, name='logout'),
path('profile', views.profile, name='profile'),
path('change_profile_pic', views.change_profile_pic, name='upload_profile_pic'),
path('create_new_post', views.create_new_post, name='create_new_post'),
path('<str:friend>', views.friends_profile, name='friends_profile'),
path('delete_post', views.delete_post_function, name='delete_post'),
]
这些是处理两个请求的views.py中的视图:
@login_required
@require_http_methods(['POST'])
def create_new_post(request):
data = json.loads(request.body.decode("utf-8"))
print(data)
new_post = Post(author=request.user, text=data['text'])
new_post.save()
data['date']= new_post.date
return JsonResponse(data)
# delete post
@login_required
@require_http_methods(['POST'])
def delete_post_function(request):
print('sdfgdfsghdsfkgjsdklfg')
response = {"response": "data arrived to server"}
return JsonResponse(response)
给我带来麻烦的是 deletePost() 方法......当它执行时,我在控制台中收到 405 错误。
有趣的是,handleClick 方法中的 XMLHTTPRequest 工作得很好
解决方案
好的,我想通了...如果 urls.py 中的 delete_post 路径不在 urlspatterns 列表的末尾,则代码有效...
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