Angular 4 - 编译器无法在组件中找到节点模块模块，但有另一个模块可以成功导入它

Question

我正在处理一些角度 4 应用程序，我想在@ng-bootstrap/ng-bootstrap中导入一些模块。问题是，即使我有一个成功导入模块的自定义模块，我的另一个模块也无法导入它并给出如下警告：WARNING in ./src/app/main/layout/fail/fail/fail.component.ts 151:83-96 "export 'NgbTimeStruct' was not found in '@ng-bootstrap/ng-bootstrap'我非常确定它已正确安装，因为我说过我有另一个模块可以毫无问题地导入它，但我错过了什么？我已经在module.ts和component.ts文件中包含了所需的模块和组件！

这些是我需要解决的问题：CalendarEvent来自angular-calendar;@ngx-translate/coreNgbDateStruct和NgbTimeStruct

这是我的代码：

模块已成功导入模块：

success.module.ts：

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { SuccessComponent } from './success.component';
import { SuccessRoutingModule } from './successrouting.module';
import { FormsModule } from '@angular/forms';
import { CalendarModule } from 'angular-calendar';
import { UtilsModule } from '../util/module';
import { FailModule } from '../../fail/fail/fail.module';
//import { FailComponent } from '../../event/eventmodify/eventmodify.component'; // I am trying to use the failed module in this module
import { NgbModalModule, NgbDatepickerModule, NgbTimepickerModule } from '@ng-bootstrap/ng-bootstrap';
import { ElementsModule } from '../../../../shared/components/elements/elements.module';
import { TranslateModule } from '@ngx-translate/core';
@NgModule({
imports: [
CommonModule,
SuccessDemoRoutingModule,
FormsModule,
NgbModalModule.forRoot(),
NgbDatepickerModule.forRoot(),
NgbTimepickerModule.forRoot(),
CalendarModule.forRoot(),
UtilsModule,
FailModule,
ElementsModule,
TranslateModule
],
declarations: [SuccessDemoComponent],
exports: [SuccessDemoComponent]
})
export class SuccessModule { }

success.component.ts：

import { Component, AfterViewInit, ChangeDetectionStrategy, ViewChild, 
TemplateRef, ElementRef } from '@angular/core';
import { Router } from '@angular/router';
import { Location } from '@angular/common';
import { TranslateService } from '@ngx-translate/core';
import { jqxDataTableComponent } from 'jqwidgets-framework/jqwidgets-ts/angular_jqxdatatable';
import { EventModifyComponent } from '../../event/eventmodify/eventmodify.component';
import { EventValue } from '../../../service/event/structure/event.value';
import { EventService } from '../../../service/event/event.service.promise';
import { ValidateUtil } from '../../../../shared/validate/validate.util';
import { GeneralService } from 
'../../../service/general/general.service.promise';
import { GeneralValue } from '../../../service/general/structure/general.value';
import { ResponseValue } from '../../../service/event/structure/response.value';
import * as myGlobal from '../../../../shared/global/global';
import { WindowComponent } from '../../../../shared/components/elements/window/window.component';
import { startOfDay, endOfDay, subDays, addDays, endOfMonth, isSameDay, isSameMonth, addHours, getMinutes, getHours, getDate, getMonth, getYear, setSeconds, setMinutes, setHours, setDate, setMonth, setYear } from 'date-fns';
import { Subject } from 'rxjs/Subject';
import { NgbModal, NgbDateStruct, NgbTimeStruct } from '@ng-bootstrap/ng-bootstrap';
import { CalendarEvent, CalendarEventAction, CalendarEventTimesChangedEvent} from 'angular-calendar';
import 'angular-calendar/dist/css/angular-calendar.css';
... //out of the failed ones I need only NgbModal is included in the constructor

模块导入模块失败：

fail.module.ts：

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FailComponent } from './fail.component';
import { FormsModule } from '@angular/forms';
import { CalendarModule } from 'angular-calendar';
import { SuccessModule } from '../../success/success/success.module';
import { UtilsModule } from '../../success/util/module';
import { NgbModalModule, NgbDatepickerModule, NgbTimepickerModule } from '@ng-bootstrap/ng-bootstrap';
import { ElementsModule } from '../../../../shared/components/elements/elements.module';
import { TranslateModule } from '@ngx-translate/core';
@NgModule({
imports: [
CommonModule,
FormsModule,
CalendarModule.forRoot(),
NgbModalModule.forRoot(),
NgbDatepickerModule.forRoot(),
NgbTimepickerModule.forRoot(),
UtilsModule,
ElementsModule,
TranslateModule
],
declarations: [FailComponent],
exports: [FailComponent]
})
export class FailModule { }

fail.component.ts：

import { Component, AfterViewInit, Input, Output, EventEmitter, ChangeDetectionStrategy, ViewChild, TemplateRef, ElementRef } from '@angular/core';
import { Router } from '@angular/router';
import { Location } from '@angular/common';
import { TranslateService } from '@ngx-translate/core';
import { jqxDataTableComponent } from 'jqwidgets-framework/jqwidgets-ts/angular_jqxdatatable';
import { EventValue } from '../../../service/event/structure/event.value';
import { EventService } from '../../../service/event/event.service.promise';
import { ValidateUtil } from '../../../../shared/validate/validate.util';
import { GeneralService } from '../../../service/general/general.service.promise';
import { GeneralValue } from '../../../service/general/structure/general.value';
import { ResponseValue } from '../../../service/event/structure/response.value';
import * as myGlobal from '../../../../shared/global/global';
import { WindowComponent } from '../../../../shared/components/elements/window/window.component';
import { startOfDay, endOfDay, subDays, addDays, endOfMonth, isSameDay, isSameMonth, addHours, getMinutes, getHours, getDate, getMonth, getYear, setSeconds, setMinutes, setHours, setDate, setMonth, setYear } from 'date-fns';
import { Subject } from 'rxjs/Subject';
import { NgbModal, NgbDateStruct, NgbTimeStruct } from '@ng-bootstrap/ng-bootstrap';
import { CalendarEvent, CalendarEventAction, CalendarEventTimesChangedEvent} from 'angular-calendar';
... // Only NgbModal included as well

关于如何使事情发挥作用的任何想法？谢谢建议。

Answer 1

事实证明，我双重导入了模块，而 Angular 不喜欢它。我从失败模块中删除了成功模块的导入，然后它运行良好。我认为，如果有人真的需要两个自定义模块相互依赖，他们最好不要通过导入两个模块来导入像NgbModalModule这样的模块两次。

而且我还听说有人共享模块的最佳方法是将它们导入共享模块。