小编rva*_*iev的帖子

我正在使用Angular2-rc4和angular-cli webpack,并希望实现chart.js库.

我使用以下方法将chart.js安装到我的项目中:

npm install chart.js --save

然后我尝试在我的组件中导入chart.js:

import {Component, OnInit, ViewChild} from '@angular/core';
import 'chart.js/src/chart.js';
declare let Chart;

@Component({
  selector: 'app-dashboard',
  templateUrl: 'dashboard.component.html',
  styleUrls: ['dashboard.component.scss']
})
export class DashboardComponent {

  chart: Chart;

}

但我在控制台日志中出错:

[default] /Applications/MAMP/htdocs/bridge/src/app/dashboard/dashboard.component.ts:12:9 
Cannot find name 'Chart'.

我究竟做错了什么？

我已经将angular-cli与节点v6.5.0和npm v3.10.3安装到我的vagrant(Scotch)盒子中.运行'ng serve --port 4201'之后,我可以看到构建成功并且应用程序现在在http:// localhost:4201 /上提供服务

但是我不能只使用上面的地址,因为我在VM上运行.我试图将'127.0.0.1:4201'添加到主机上的hosts文件中,但无法正常工作.

谢谢

我正在构建动态表单,并且想要"动态"添加表单组.

这是我的代码几乎可以工作:

import {Component, OnInit} from '@angular/core';
import {FormGroup, FormBuilder, FormArray, Validators, FormControl} from "@angular/forms";

export class CombinedComponent implements OnInit {

    ltsForm: FormGroup;

    constructor(private formBuilder: FormBuilder) {
    }

    ngOnInit() {
        this.ltsForm = this.initFormGroup();

        // init products
        for (let i = 0; i < 3; i++) { // add dynamically products
            this.addProduct();
        }

        console.log(this.ltsForm); // Array 'prods' is empty
    }

    // initialize form group, but don't add products yet because they will be added dynamically later
    initFormGroup() {
        let group = …

我正在使用User实体内部的回调进行自定义验证.

因此,我需要获取当前登录用户的User对象.

在控制器中,我可以这样做:

$user= $this->get('security.context')->getToken()->getUser();

但是我应该如何在User实体中执行此操作？

我正在尝试使用websockets将一些数据从php应用程序发送到用户的浏览器.因此我决定将Swoole与RabbitMQ结合使用.

这是我第一次使用websockets并在阅读了一些关于Socket.IO,Ratchet等的帖子后,我决定停止使用Swoole,因为它是用C编写的,并且可以方便地与php一起使用.

这就是我理解使用websockets启用数据传输的想法:1)在CLI中启动RabbitMQ worker和Swoole服务器2)php应用程序向RabbitMQ发送数据3)RabbitMQ向worker发送带有数据的消息4)Worker接收带有数据的消息+建立与Swoole套接字服务器的套接字连接.5)Swoole服务器向所有连接广播数据

问题是如何将Swoole套接字服务器与RabbitMQ绑定？或者如何让RabbitMQ与Swoole建立连接并向其发送数据？

这是代码:

Swoole服务器(swoole_sever.php)

$server = new \swoole_websocket_server("0.0.0.0", 2345, SWOOLE_BASE);

$server->on('open', function(\Swoole\Websocket\Server $server, $req)
{
    echo "connection open: {$req->fd}\n";
});

$server->on('message', function($server, \Swoole\Websocket\Frame $frame)
{
    echo "received message: {$frame->data}\n";
    $server->push($frame->fd, json_encode(["hello", "world"]));
});

$server->on('close', function($server, $fd)
{
    echo "connection close: {$fd}\n";
});

$server->start();

工作者从RabbitMQ接收消息,然后连接到Swoole并通过套接字连接(worker.php)广播消息

$connection = new AMQPStreamConnection('0.0.0.0', 5672, 'guest', 'guest');
$channel = $connection->channel();

$channel->queue_declare('task_queue', false, true, false, false);

echo ' [*] Waiting for messages. To exit press CTRL+C', "\n";

$callback = function($msg){
    echo " …

我在Angular-cli的Angular 2决赛中使用了observable.

• Angular 2.0.0决赛
• angular-cli:1.0.0-beta.15
• 节点:6.3.0
• Mac os:el capitan

package.json中的依赖项:

"dependencies": {
    "@angular/common": "2.0.0",
    "@angular/compiler": "2.0.0",
    "@angular/core": "2.0.0",
    "@angular/forms": "2.0.0",
    "@angular/http": "2.0.0",
    "@angular/platform-browser": "2.0.0",
    "@angular/platform-browser-dynamic": "2.0.0",
    "@angular/router": "3.0.0",
    "bootstrap-sass": "^3.3.7",
    "chart.js": "^2.2.2",
    "core-js": "^2.4.1",
    "d3": "^4.2.3",
    "d3-tip": "^0.7.1",
    "ionicons": "^3.0.0",
    "moment": "^2.15.1",
    "rxjs": "5.0.0-beta.12",
    "ts-helpers": "^1.1.1",
    "zone.js": "^0.6.23"
  }

我的应用程序在Safari 9.1.2以外的每个浏览器中都能正常工作 - 它会将此错误消息抛出到控制台:

Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:4200/Observable.js.map

我试图在angular_cli.json中导入Rxjs:

"scripts": [
        "../node_modules/rxjs/Rx.js"
      ],

另外,我试图将rxjs导入到app.module.ts和这样的工作组件:

import {Observable} from 'rxjs/Rx';

但是继续得到同样的错误.

难道我做错了什么？很奇怪只有Safari遇到这个错误.

我在清单实体中有一个ManyToMany关系：

/**
 * @ORM\Entity(repositoryClass="AppBundle\Repository\ListingRepository")
 * @ORM\Table(name="listings")
 */
class Listing extends MainEntity
{
    /**
     * @ORM\Id
     * @ORM\Column(type="uuid")
     */
    private $id;

    /**
     * @ORM\ManyToMany(targetEntity="AppBundle\Entity\AttributeDescription", inversedBy="listings", cascade={"persist", "remove"})
     * @JoinTable(name="listing_attriubute_descriptions",
     *      joinColumns={@JoinColumn(name="listing_id", referencedColumnName="id")},
     *      inverseJoinColumns={@JoinColumn(name="attribute_description_id", referencedColumnName="id")}
     *      )
     */
    public $attributeDescriptions;

    public function __construct()
    {
        $this->id = Uuid::uuid4();
        $this->attributeDescriptions = new ArrayCollection();
    }

    public function removeAttributeDescription(AttributeDescription $attributeDescription)
    {
        if(!$this->attributeDescriptions->contains($attributeDescription))
        {
            return;
        }
        $this->attributeDescriptions->remove($attributeDescription);

        return $this;
    }
}

在ListingService的某个地方，我试图从Listing实体中删除AttributeDescription，如下所示：

$listing->removeAttributeDescription($toRemoveAttributeDescription);

但出现错误：警告：isset中的偏移量类型非法或为空

使用xdebug，我进入了ArrayCollection中的remove（）方法：

public function remove($key)
{
    if ( ! isset($this->elements[$key]) && ! array_key_exists($key, …

如何在成功授权后返回json对象而不是重定向到默认路径？我正在使用Symfony 3.0.1,我不使用FOSBundle.

我的登录控制器如下所示:

class ClientLoginController extends Controller
{
    /**
     * @Route("/login", name="login")
     */
    public function loginAction(Request $request)
    {
        $client = new Client();
        $form   = $this->createForm(ClientLoginType::class, $client);

        $form->handleRequest($request);

        $authenticationUtils = $this->get('security.authentication_utils');

        $lastEmail = $authenticationUtils->getLastUsername();

        $error = $authenticationUtils->getLastAuthenticationError();

        if ($form->isSubmitted() && $form->isValid())
        {
            return new JsonResponse(
                array(
                    'message' => 'Success! You're authorised!',
                    'result'  => $this->renderView('SymfonyBundle::client/success.html.twig')
                ), 200);
        }

        return $this->render(
            'SymfonyBundle::security/security.html.twig',
            array(
                'login_form' => $form->createView(),
                'error'         => $error,
                'last_email' => $lastEmail,
            )
        );
    }
}

而security.yml配置中的登录部分如下所示:

form_login:
    login_path: login
    check_path: login
    username_parameter: …