Angular 插入产品和上传文件分别工作,但不在一起
我正在开发我的第一个CRUD测试应用程序 我有一个典型的产品名称,价格表。。。以及用于上载产品的输入文件 我为表单的更改事件创建了一个事件处理程序方法。很好 我创建了这个uploadFile()方法,效果很好 上传文件服务.tsAngular 插入产品和上传文件分别工作,但不在一起,angular,typescript,angular6,Angular,Typescript,Angular6,我正在开发我的第一个CRUD测试应用程序 我有一个典型的产品名称,价格表。。。以及用于上载产品的输入文件 我为表单的更改事件创建了一个事件处理程序方法。很好 我创建了这个uploadFile()方法,效果很好 上传文件服务.ts import {Injectable, Input} from '@angular/core'; import {Http, Response, Headers, RequestOptions} from '@angular/http'; import {Router,
import {Injectable, Input} from '@angular/core';
import {Http, Response, Headers, RequestOptions} from '@angular/http';
import {Router, ActivatedRoute,Params} from '@angular/router';
import {map} from 'rxjs/operators';
import {_GLOBAL} from './global.service';
import {Observable} from 'rxjs';
import {Producto} from '../models/Producto.model';
@Injectable()
export class UploadFileService
{
public url:string;
public filesToUpload:Array<File>;
constructor()
{
this.url=_GLOBAL.url;//this has the URL of the REST service
this.filesToUpload=[];
}
uploadFile(url:string, params:Array<string>,filesToUpload:Array<File>)
{
return new Promise((resolve, reject)=>{
var formData:any= new FormData();
var asyncRequest=new XMLHttpRequest();
for(var i=0; i<filesToUpload.length;++i)
{
formData.append('filesUploaded[]',filesToUpload[i],filesToUpload[i].name);
}
asyncRequest.onreadystatechange=function(){
if(asyncRequest.readyState==4){
if(asyncRequest.status==200){
resolve(JSON.parse(asyncRequest.response));
}else{
reject(asyncRequest.response);
}
}
}
asyncRequest.open('POST',url,true);
asyncRequest.send(formData);
});
}
fileChangeEvent(ElementObjectReferenceWhichTriggersEvent:any)// in this case, the input type="file"
{
this.filesToUpload=<Array<File>>ElementObjectReferenceWhichTriggersEvent.target.files;//captura los archivos mandados en el input
console.log(ElementObjectReferenceWhichTriggersEvent.target);
console.log(ElementObjectReferenceWhichTriggersEvent.target.files[0]);
console.log(this.filesToUpload);
// return this.filesToUpload;
}
}
它的工作原理是:上传文件并正确插入产品。。。问题是,在数据库上,我希望结果[“complete_name”]
存储在图像字段中,然后我可以在以后获得所有产品时显示图像,而不是http.post()包含在字段中的“c:/fakepath/PICTURE.PNG”
为此,我需要捕获响应,然后使用结果[“complete\u name”]
为此,我仅在promise响应成功时才使用http.post()
。因此,当上传图像时,我捕获响应结果,将其添加到post()方法上作为参数传递的对象中,然后发送它
import {Injectable} from '@angular/core';
import {Http, Response, Headers, RequestOptions} from '@angular/http';
import {Router, ActivatedRoute,Params} from '@angular/router';
import {map} from 'rxjs/operators';
import {_GLOBAL} from './global.service';
import {Observable} from 'rxjs';
import {Producto} from '../models/Producto.model';
import {UploadFileService} from './upload-file.service';
@Injectable()
export class CreateProductService{
public url:string;
public errorMessage:string;
public productToInsert:Producto;
public imageData:string;
constructor(
private _http:Http,
private _route:ActivatedRoute,
private _router:Router,
private _uploadFile:UploadFileService
)
{
this.url=_GLOBAL.url;
this.errorMessage="";
this.productToInsert=new Producto("","","","");
}//end constructor
ngOnInit()
{
}
createProduct()
{
let headers = new Headers({ 'Content-Type': 'application/x-www-form-urlencoded' });
let options = new RequestOptions({ headers: headers });
this._uploadFile.uploadFile(`${this.url}/upload-file`,[],this._uploadFile.filesToUpload).then(
(result)=>{
console.log(result["complete_name"]);
this.productToInsert.imagen=result["complete_name"];
this._http.post(`${this.url}/crear-producto`,this.productToInsert,options).pipe(
map(
(res)=>{
return res.json();
},(err)=>{
return err;
}
)).subscribe(
(response)=>
{
console.log( response);
this._router.navigate(['all-products']);
},
(error)=>
{
console.log(+error);
}
);
},
(error)=>{
console.log(error);
}
);
}
}
但这是行不通的。我得到了一个200响应,但是这个例子中的对象似乎是空的(所有字段都为null),而不是来自表单的
这是所用的表格
创建产品组件.html
<form #formCreateProduct="ngForm" (ngSubmit)="_createProduct.createProduct(); formCreateProduct.reset()" class="col-lg-6" id="form-crear-producto-id">
<div class="form-group">
<label for="nombreLabel"> Name of the new product:
<span *ngIf="!nombre.valid && nombre.touched && _createProduct.productToInsert.nombre.length != 0" class="label label-danger">Minimun 3 characters please</span>
</label>
<input type="text" class="form-control" name="name" #nombre="ngModel" pattern =".{3,}"[(ngModel)]="_createProduct.productToInsert.nombre" required /> <br/>
</div>
<div class="form-group">
<label for="priceLabel">Price ( € ): (please decimals with a dot. Ex:29.5)
<span *ngIf="!precio.valid && precio.touched && _createProduct.productToInsert.precio.length != 0" class="label label-danger">Price is not valid. At least one number please, and only numbers</span>
</label>
<input type="text" class="form-control" name="price" #precio="ngModel" pattern="[0-9.]+" [(ngModel)]="_createProduct.productToInsert.precio" required /> <br/>
</div>
<div class="form-group">
<label for="imageLabel">Image:</label>
<!--file doesnt suport the ngmodel-->
<input type="file" class="form-control" name="imagen" (change)="_uploadFile.fileChangeEvent($event)" [(ngModel)]="_createProduct.productToInsert.imagen" required /> <br/>
</div>
<div class="form-group">
<label for="descriptionLabel">Description:</label>
<div [ngClass]="{'TopLength': _createProduct.productToInsert.descripcion.length==300}">{{_createProduct.productToInsert.descripcion.length}}/300</div>
<textarea name="description" class="form-control" maxlength="300" #descripcion="ngModel" [(ngModel)]="_createProduct.productToInsert.descripcion" cols="40" rows="3" ></textarea> <br/>
</div>
<input type="submit" value={{title}} [disabled]="formCreateProduct.invalid" class ="btn btn-lg btn-success" /> <br/>
</form>
新产品名称:
最少3个字符
价格(欧元):(请用小数点表示。例如:29.5)
价格无效。请至少输入一个数字,并且只输入数字
图片:
说明:
{{{u createProduct.productToInsert.Description.length}/300
我知道,因为这是我第一个使用angular的应用程序,服务和类似的东西使用起来可能有点奇怪,但我尝试了:
- 避免使用服务,并将其直接放在component.ts中
- 只为create-component-service.ts使用一个服务,将所有方法(uploadFile、eventHandler、createProduct)放在那里,并在组件上使用它们(我想这实际上是使用服务的正确方式)
- 绑定“this”作用域,查看arrow函数中的作用域是否存在任何问题
Uncaught (in promise): SecurityError: The operation is insecure. ./node_modules/@angular/platform-browser/fesm5/platform-browser.js/DefaultDomRenderer2.prototype.setProperty@http://localhost:4200/vendor.js:56793:9 ./node_modules/@angular/core/fesm5/core.js/DebugRenderer2.prototype.setProperty@http://localhost:4200/vendor.js:42592:9 ./node_modules/@angular/forms/fesm5/forms.js/DefaultValueAccessor.prototype.writeValue@http://localhost:4200/vendor.js:48231:9 setUpModelChangePipeline/<@http://localhost:4200/vendor.js:49205:9 ./node_modules/@angular/forms/fesm5/forms.js/FormControl.prototype.setValue/<@http://localhost:4200/vendor.js:50262:65 ./node_modules/@angular/forms/fesm5/forms.js/FormControl.prototype.setValue@http://localhost:4200/vendor.js:50262:13 ./node_modules/@angular/forms/fesm5/forms.js/NgModel.prototype._updateValue/<@http://localhost:4200/vendor.js:51617:46 ./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:2710:17 onInvoke@http://localhost:4200/vendor.js:35055:24 ./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:2709:17 ./node_modules/zone.js/dist/zone.js/</Zone.prototype.run@http://localhost:4200/polyfills.js:2460:24 scheduleResolveOrReject/<@http://localhost:4200/polyfills.js:3194:29 ./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invokeTask@http://localhost:4200/polyfills.js:2743:17 onInvokeTask@http://localhost:4200/vendor.js:35046:24 ./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invokeTask@http://localhost:4200/polyfills.js:2742:17 ./node_modules/zone.js/dist/zone.js/</Zone.prototype.runTask@http://localhost:4200/polyfills.js:2510:28 drainMicroTaskQueue@http://localhost:4200/polyfills.js:2917:25 ./node_modules/zone.js/dist/zone.js/</ZoneTask.invokeTask@http://localhost:4200/polyfills.js:2822:21 invokeTask@http://localhost:4200/polyfills.js:3862:9 globalZoneAwareCallback@http://localhost:4200/polyfills.js:3888:17
Uncaught(承诺中):SecurityError:操作不安全/node_modules/@angular/platform browser/fesm5/platform-browser.js/defaultdomrender2.prototype。setProperty@http://localhost:4200/vendor.js:56793:9./node_modules/@angular/core/fesm5/core.js/debugrender2.prototype。setProperty@http://localhost:4200/vendor.js:42592:9./node_modules/@angular/forms/fesm5/forms.js/DefaultValueAccessor.prototype。writeValue@http://localhost:4200/vendor.js:48231:9 setUpModelChangePipeline/我解决了它。这是一件愚蠢的事情:
问题是,在我的组件中,从以前的版本来看,我在表单上:
reset()方法在我实际发送表单值之前将所有表单值设置为null。删除了这个方法(在新版本中,我做了一个重定向,所以我不需要它),问题就解决了。这两天…:O
Uncaught (in promise): SecurityError: The operation is insecure. ./node_modules/@angular/platform-browser/fesm5/platform-browser.js/DefaultDomRenderer2.prototype.setProperty@http://localhost:4200/vendor.js:56793:9 ./node_modules/@angular/core/fesm5/core.js/DebugRenderer2.prototype.setProperty@http://localhost:4200/vendor.js:42592:9 ./node_modules/@angular/forms/fesm5/forms.js/DefaultValueAccessor.prototype.writeValue@http://localhost:4200/vendor.js:48231:9 setUpModelChangePipeline/<@http://localhost:4200/vendor.js:49205:9 ./node_modules/@angular/forms/fesm5/forms.js/FormControl.prototype.setValue/<@http://localhost:4200/vendor.js:50262:65 ./node_modules/@angular/forms/fesm5/forms.js/FormControl.prototype.setValue@http://localhost:4200/vendor.js:50262:13 ./node_modules/@angular/forms/fesm5/forms.js/NgModel.prototype._updateValue/<@http://localhost:4200/vendor.js:51617:46 ./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:2710:17 onInvoke@http://localhost:4200/vendor.js:35055:24 ./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invoke@http://localhost:4200/polyfills.js:2709:17 ./node_modules/zone.js/dist/zone.js/</Zone.prototype.run@http://localhost:4200/polyfills.js:2460:24 scheduleResolveOrReject/<@http://localhost:4200/polyfills.js:3194:29 ./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invokeTask@http://localhost:4200/polyfills.js:2743:17 onInvokeTask@http://localhost:4200/vendor.js:35046:24 ./node_modules/zone.js/dist/zone.js/</ZoneDelegate.prototype.invokeTask@http://localhost:4200/polyfills.js:2742:17 ./node_modules/zone.js/dist/zone.js/</Zone.prototype.runTask@http://localhost:4200/polyfills.js:2510:28 drainMicroTaskQueue@http://localhost:4200/polyfills.js:2917:25 ./node_modules/zone.js/dist/zone.js/</ZoneTask.invokeTask@http://localhost:4200/polyfills.js:2822:21 invokeTask@http://localhost:4200/polyfills.js:3862:9 globalZoneAwareCallback@http://localhost:4200/polyfills.js:3888:17