angularjs - 覆盖 primeNg 的 DataTable 组件时模板解析错误

Question

我想覆盖 DataTable 的模板primeng的组成部分这就是我的代码的样子:

my-datatable.component.ts

import { Component, OnInit, ElementRef, Renderer2, ChangeDetectorRef } from '@angular/core';
import { DataTable, DomHandler } from 'primeng/primeng';
import { ObjectUtils } from '../../../../node_modules/primeng/components/utils/ObjectUtils'
import { ColumnHeaders } from '../../../../node_modules/primeng/components/datatable/datatable'

@Component({
  selector: 'my-datatable',
  templateUrl: './my-datatable.component.html',
  styleUrls: ['./my-datatable.component.scss']    
})
export class MyDatatableComponent extends DataTable {

    constructor(el: ElementRef, domHandler: DomHandler, renderer: Renderer2, changeDetector: ChangeDetectorRef, objectUtils: ObjectUtils) { 
        super(el, domHandler, renderer, changeDetector, objectUtils);
        console.log('MyDatatableComponent');
    }

}

my-datatable.component.html，此文件具有与基本组件相同的模板。想法是先运行然后进行修改

<div [ngStyle]="style" [class]="styleClass" [style.width]="containerWidth" [ngClass]="{'ui-datatable ui-widget':true,'ui-datatable-reflow':responsive,'ui-datatable-stacked':stacked,'ui-datatable-resizable':resizableColumns,'ui-datatable-scrollable':scrollable}">
  <div class="ui-datatable-loading ui-widget-overlay" *ngIf="loading"></div>
  <div class="ui-datatable-loading-content" *ngIf="loading">
    <i class="fa fa-circle-o-notch fa-spin fa-2x"></i>
  </div>
  <div class="ui-datatable-header ui-widget-header" *ngIf="header">
    <ng-content select="p-header"></ng-content>
  </div>
  <p-paginator [rows]="rows" [first]="first" [totalRecords]="totalRecords" [pageLinkSize]="pageLinks" styleClass="ui-paginator-bottom" (onPageChange)="paginate($event)" [rowsPerPageOptions]="rowsPerPageOptions" *ngIf="paginator && paginatorPosition!='bottom' || paginatorPosition =='both'"></p-paginator>
  <div class="ui-datatable-tablewrapper" *ngIf="!scrollable">
    <table [class]="tableStyleClass" [ngStyle]="tableStyle">
      <thead class="ui-datatable-thead">
        <tr *ngIf="!headerColumnGroup" class="ui-state-default" [pColumnHeaders]="columns"></tr>
        <ng-template [ngIf]="headerColumnGroup">
          <tr *ngFor="let headerRow of headerColumnGroup.rows" class="ui-state-default" [pColumnHeaders]="headerRow.columns"></tr>
        </ng-template>
      </thead>
      <tfoot *ngIf="hasFooter()" class="ui-datatable-tfoot">
        <tr *ngIf="!footerColumnGroup" class="ui-state-default" [pColumnFooters]="columns"></tr>
        <ng-template [ngIf]="footerColumnGroup">
          <tr *ngFor="let footerRow of footerColumnGroup.rows" class="ui-state-default" [pColumnFooters]="footerRow.columns"></tr>
        </ng-template>
      </tfoot>
      <tbody [ngClass]="{'ui-datatable-data ui-widget-content': true, 'ui-datatable-hoverable-rows': (rowHover||selectionMode)}" [pTableBody]="columns"></tbody>
    </table>
  </div>

  <ng-template [ngIf]="scrollable">
    <div class="ui-datatable-scrollable-wrapper ui-helper-clearfix" [ngClass]="{'max-height':scrollHeight}">
      <div *ngIf="frozenColumns" [pScrollableView]="frozenColumns" frozen="true" [ngStyle]="{'width':this.frozenWidth}" class="ui-datatable-scrollable-view ui-datatable-frozen-view"></div>
      <div [pScrollableView]="scrollableColumns" [ngStyle]="{'width':this.unfrozenWidth, 'left': this.frozenWidth}" class="ui-datatable-scrollable-view" [virtualScroll]="virtualScroll" (onVirtualScroll)="onVirtualScroll($event)" [ngClass]="{'ui-datatable-unfrozen-view': frozenColumns}"></div>
    </div>
  </ng-template>

  <p-paginator [rows]="rows" [first]="first" [totalRecords]="totalRecords" [pageLinkSize]="pageLinks" styleClass="ui-paginator-bottom" [alwaysShow]="alwaysShowPaginator" (onPageChange)="paginate($event)" [rowsPerPageOptions]="rowsPerPageOptions" *ngIf="paginator && paginatorPosition!='top' || paginatorPosition =='both'"></p-paginator>
  <div class="ui-datatable-footer ui-widget-header" *ngIf="footer">
    <ng-content select="p-footer"></ng-content>
  </div>

  <div class="ui-column-resizer-helper ui-state-highlight" style="display:none"></div>
  <span class="fa fa-arrow-down ui-datatable-reorder-indicator-up" style="position: absolute; display: none;"></span>
  <span class="fa fa-arrow-up ui-datatable-reorder-indicator-down" style="position: absolute; display: none;"></span>
</div>

我还在 declarations 中添加了这个新组件app.module.ts 中的数组文件。所以，我知道它被包含在内，这就是我收到解析错误的原因。

我在控制台中遇到的错误是:

Unhandled Promise rejection: Template parse errors:
Can't bind to 'pColumnHeaders' since it isn't a known property of 'tr'. ("ass="ui-datatable-thead">
                  <tr *ngIf="!headerColumnGroup" class="ui-state-default" [ERROR ->][pColumnHeaders]="columns"></tr>
                  <ng-template [ngIf]="headerColumnGroup">
         "): ng:///AppModule/CsxDatatableComponent.html@14:74
Can't bind to 'pColumnHeaders' since it isn't a known property of 'tr'. ("                      <tr *ngFor="let headerRow of headerColumnGroup.rows" class="ui-state-default" [ERROR ->][pColumnHeaders]="headerRow.columns"></tr>
                  </ng-template>
              </thead>
"): ng:///AppModule/CsxDatatableComponent.html@16:100
Can't bind to 'pColumnFooters' since it isn't a known property of 'tr'. ("ass="ui-datatable-tfoot">
                  <tr *ngIf="!footerColumnGroup" class="ui-state-default" [ERROR ->][pColumnFooters]="columns"></tr>
                  <ng-template [ngIf]="footerColumnGroup">
         "): ng:///AppModule/CsxDatatableComponent.html@20:74
Can't bind to 'pColumnFooters' since it isn't a known property of 'tr'. ("                      <tr *ngFor="let footerRow of footerColumnGroup.rows" class="ui-state-default" [ERROR ->][pColumnFooters]="footerRow.columns"></tr>
                  </ng-template>
              </tfoot>
"): ng:///AppModule/CsxDatatableComponent.html@22:100
Can't bind to 'pTableBody' since it isn't a known property of 'tbody'. ("datatable-data ui-widget-content': true, 'ui-datatable-hoverable-rows': (rowHover||selectionMode)}" [ERROR ->][pTableBody]="columns"></tbody>
          </table>
      </div>
"): ng:///AppModule/CsxDatatableComponent.html@25:137
Can't bind to 'pScrollableView' since it isn't a known property of 'div'. ("-helper-clearfix" [ngClass]="{'max-height':scrollHeight}">
              <div *ngIf="frozenColumns" [ERROR ->][pScrollableView]="frozenColumns" frozen="true" 
                  [ngStyle]="{'width':this.frozenWid"): ng:///AppModule/CsxDatatableComponent.html@31:41
Can't bind to 'pScrollableView' since it isn't a known property of 'div'. ("ozenWidth}" class="ui-datatable-scrollable-view ui-datatable-frozen-view"></div>
              <div [ERROR ->][pScrollableView]="scrollableColumns" [ngStyle]="{'width':this.unfrozenWidth, 'left': this.frozenWidt"): ng:///AppModule/CsxDatatableComponent.html@33:19
Can't bind to 'virtualScroll' since it isn't a known property of 'div'. ("is.unfrozenWidth, 'left': this.frozenWidth}"
                  class="ui-datatable-scrollable-view" [ERROR ->][virtualScroll]="virtualScroll" (onVirtualScroll)="onVirtualScroll($event)"
                  [ngClas"): ng:///AppModule/CsxDatatableComponent.html@34:55 ; Zone: <root> ; Task: Promise.then ;

pColumnHeaders、pColumnFooters 都是已通过 DataTableModule 导出的组件。 。我无法弄清楚如何让这些解析错误消失，我确信我错过了一些东西。

非常感谢任何帮助。

更新:这就是我的 app.module.ts 的样子。我有DataTableModule , BrowserModule和FormsModule进口的。我可以在我的 View 上使用标准 primeNg 数据表组件，只是无法覆盖它。

app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';

/* PRIME NG */
import { 
          AutoCompleteModule,
          PanelMenuModule, 
          MenuItem, 
          MenubarModule, 
          OverlayPanelModule, 
          TabViewModule, 
          ButtonModule, 
          CodeHighlighterModule,
          DropdownModule,
          DialogModule, 
          MultiSelectModule ,
          InputTextModule,
          TooltipModule,
          CheckboxModule,
          SplitButtonModule,
          RadioButtonModule,
          MessagesModule,
          ConfirmDialogModule,
          ConfirmationService,
          AccordionModule,
          PanelModule,
          FieldsetModule,
          CalendarModule,
          DataTableModule,
          MenuModule,
          BreadcrumbModule,
          TreeModule,
          DomHandler,
          ChartModule
        } from 'primeng/primeng';
import { ObjectUtils } from '../../node_modules/primeng/components/utils/ObjectUtils';


/* APP-SPECIFIC */
import { WindowRef } from './windowref';
import { routing } from './app.routing';
import { MyDatatableComponent } from './components/my-datatable.component';


@NgModule({
  declarations: [ 
    DatatableComponent,   
    ChartsGraphsComponent,
    CsxDatatableComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    routing,
    AutoCompleteModule,
    BrowserAnimationsModule,
    PanelMenuModule,
    MenubarModule,
    OverlayPanelModule, 
    TabViewModule,
    ButtonModule,
    CodeHighlighterModule,
    DropdownModule,
    MultiSelectModule,
    DialogModule,
    InputTextModule,
    TooltipModule,
    CheckboxModule,
    SplitButtonModule,
    RadioButtonModule,
    MessagesModule,
    ConfirmDialogModule,
    AccordionModule,
    PanelModule,
    FieldsetModule,
    CalendarModule,
    DataTableModule,
    MenuModule,
    BreadcrumbModule,
    TreeModule,
    ChartModule
  ],
  providers: [
    DomHandler,
    ObjectUtils
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

Answer 1

您看到此错误是因为您尝试使用的选择器未由其各自的模块导出，因为它们是 PrimeNG 框架的内部/私有(private)部分的一部分。

如果您尝试使用的选择器未导出，则导入 DataTableModule 不会产生任何影响。

就 [pColumnHeaders] 而言，由 ColumnHeaders 组件在 datatable.ts 中定义，您将看到 ColumnHeaders 组件未在 DataTableModule 定义中导出:

@NgModule({
    imports: [CommonModule,SharedModule,PaginatorModule,FormsModule],
    exports: [DataTable,SharedModule],
    declarations: [DataTable,DTRadioButton,DTCheckbox,ColumnHeaders,ColumnFooters,TableBody,ScrollableView,RowExpansionLoader]
})
export class DataTableModule { }

Source of datatable.ts

为了能够使用 [pColumnHeaders] 选择器，DataTableModule 必须导出 ColumnHeaders 组件，如下所示:

@NgModule({
    imports: [CommonModule,SharedModule,PaginatorModule,FormsModule],
    exports: [DataTable,SharedModule,ColumnHeaders],
    declarations: [DataTable,DTRadioButton,DTCheckbox,ColumnHeaders,ColumnFooters,TableBody,ScrollableView,RowExpansionLoader]
})
export class DataTableModule { }

我的猜测是，这种设计是故意的，并且您正在尝试使用不属于 API 一部分的“私有(private)”和未记录的选择器。

您必须问自己的问题是您想要实现的目标是什么。很可能 PrimeNG DataTable API provides the interface to do that .