在构造角度6库时为导出的符号生成的元数据中遇到错误

Question

从我的库中执行'ng build'时出现以下错误.

我目前正在使用Angular 6,但我相信这个错误与版本无关.

/home/rafaelvicio/desenv/my-lib/arquitetura-web/projects/pf-siseg/src/lib/keycloak-service/keycloak.service.ts:13:1:为导出的符号'KeycloakService'生成的元数据中遇到错误:
/home/rafaelvicio/desenv/my-lib/arquitetura-web/projects/pf-siseg/src/lib/keycloak-service/keycloak.service.ts:18 : 12:收集的元数据包含一个错误,将在运行时:只能初始化变量和常量,因为模板编译器需要此变量的值.
{"_ _ symbolic":"错误","消息":"变量未初始化","行":17,"字符":11}错误:/ home/rafaelvicio/desenv/my-lib/arquitetura-web/projects/pf-siseg/src/lib/keycloak-service/keycloak.service.ts:13:1:为导出的符号'KeycloakService'生成的元数据遇到错误:
/home/rafaelvicio/desenv/my-lib/arquitetura-web/projects /pf-siseg/src/lib/keycloak-service/keycloak.service.ts:18:12:收集的元数据包含将在运行时报告的错误:只能初始化变量和常量,因为此变量的值为模板编译器需要的.
{"_ _ symbolic":"错误","消息":"变量未初始化","行":17,"字符":11} at/home/rafaelvicio/desenv/my-lib/arquitetura-web/node_modules/@ angular/compiler-cli/src/metadata/collector.js:707:31位于validateMetadata的Array.forEach()(/ home/rafaelvicio/desenv/my-lib/arquitetura-web/node_modules/@ angular/compiler-cli/src/metadata/collector.js:695:46)在MetadataCollector.getMetadata(/home/rafaelvicio/desenv/my-lib/arquitetura-web/node_modules/@angular/compiler-cli/src/metadata/collector.js:550 :21)在Object.getSourceFileMetadata上的MetadataCache.getMetadata(/home/rafaelvicio/desenv/my-lib/arquitetura-web/node_modules/@angular/compiler-cli/src/transformers/metadata_cache.js:86:41) home.rafaelvicio/desenv/my-lib/arquitetura-web/node_modules/@angular/compiler-cli/src/transformers/compiler_host.js:112:56)at Object.readMetadata(/ home/rafaelvicio/desenv/my-lib TsompilerAotCompiler上的/arquitetura-web/node_modules/@angular/compiler-cli/src/transformers/metadata_reader.js:46:37)StaticSymbolResolver.getModuleMetadata中的TypeCheckHostAdapter.getMetadataFor(/home/rafaelvicio/desenv/my-lib/arquitetura-web/node_modules/@angular/compiler-cli/src/transformers/compiler_host.js:464:38)(/ home/rafaelvicio/desenv/my-lib/arquitetura-web/node_modules/@angular/compiler/src/aot/static_symbol_resolver.js:480:49)在StaticSymbolResolver._createSymbolsOf(/ home/rafaelvicio/desenv/my-lib/arquitetura-web/node_modules) /@angular/compiler/src/aot/static_symbol_resolver.js:268:33)

keycloak.service.ts:

import { Injectable } from '@angular/core';
import { KeycloakLoginOptions } from './keycloak.d';

import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs/Observable';

import * as Keycloak from './keycloak';

export type KeycloakClient = Keycloak.KeycloakInstance;
type InitOptions = Keycloak.KeycloakInitOptions;

@Injectable()
export class KeycloakService {

    constructor(private http: HttpClient) { }

    static keycloakAuth: KeycloakClient;

.... More code here

Answer 1

// @dynamic在声明静态方法的类之前添加

Answer 2

我今天在一个提供静态方法作为帮助器的类中遇到了这个问题util。

我通过替换this为ObjectUtils（类名本身）解决了这个问题，并且它有效。

另外，正如 @NicolasThierion 在@stack247 评论的回复中提到的，您还可以尝试以下 hack

// @dynamic
export class SomeClass {
    public static get() { return 'someValue'; } 
}

Answer 3

我遇到了同样的问题，并通过从变量中删除“static”解决了问题。