将 SAP Spartacus 作为 feature module 进行 Lazy Load 延迟加载时，遇到如下错误：

![](https://img-blog.csdnimg.cn/img_convert/6ac2e7358f5c5a978efd3cdcfe117e4e.png)

> ERROR Error: Uncaught (in promise): NullInjectorError: R3InjectorError(CatalogModule)[UserAuthEventModule -> UserAuthEventBuilder -> UserAuthEventBuilder -> AuthService -> OAuthLibWrapperService -> OAuthService -> OAuthService -> OAuthService]: 
  NullInjectorError: No provider for OAuthService!
NullInjectorError: R3InjectorError(CatalogModule)[UserAuthEventModule -> UserAuthEventBuilder -> UserAuthEventBuilder -> AuthService -> OAuthLibWrapperService -> OAuthService -> OAuthService -> OAuthService]: 
  NullInjectorError: No provider for OAuthService!
    at NullInjector.get (core.js:11120:1)
    at R3Injector.get (core.js:11287:1)
    at R3Injector.get (core.js:11287:1)
    at R3Injector.get (core.js:11287:1)
    at injectInjectorOnly (core.js:4770:1)
    at Module.ɵɵinject (core.js:4774:1)
    at Object.OAuthLibWrapperService_Factory [as factory] (spartacus-core.js:1514:1)
    at R3Injector.hydrate (core.js:11457:1)
    at R3Injector.get (core.js:11276:1)
    at injectInjectorOnly (core.js:4770:1)
    at resolvePromise (zone.js:1211:1)
    at resolvePromise (zone.js:1165:1)
    at zone.js:1278:1
    at _ZoneDelegate.invokeTask (zone.js:406:1)
    at Object.onInvokeTask (core.js:28679:1)
    at _ZoneDelegate.invokeTask (zone.js:405:1)
    at Zone.runTask (zone.js:178:1)
    at drainMicroTaskQueue (zone.js:585:1)UserAuthEventModule

具体分析：
UserAuthEventModule 使用了 UserAuthEventBuilder 作为依赖：

![](https://img-blog.csdnimg.cn/img_convert/f772a98d67238a5b3d27bf76b215daba.png)

UserAuthEventBuilder 使用了 AuthService：

![](https://img-blog.csdnimg.cn/img_convert/8c613a116b9ff2c2ed8f16fc554de199.png)

AuthService 使用了 OAuthLibWrapperService

![](https://img-blog.csdnimg.cn/img_convert/91692e48e858f465f05f3133e057a786.png)

OAuthLibWrapperService 使用了 OAuthService
![](https://img-blog.csdnimg.cn/img_convert/d34cb298a424c892ca8cdabcf61f8c29.png)

这个 OAuthService 最后来自 `angular-oauth2-oidc`，一个开源的 Angular oAuth2 实现库：

![](https://img-blog.csdnimg.cn/img_convert/e274b1da3f26e6e0c3fb5a3b2026b600.png)

OAuthService angular-oauth2-oidc

根据错误消息 `No provider for OAuthService` 在网上查找，发现下列这个 known issue：

https://github.com/manfredsteyer/angular-oauth2-oidc/issues/258

![](https://img-blog.csdnimg.cn/img_convert/0f21b0ed825f96fa869dbb289a5919b9.png)

添加第 49 行的 `OAuthModule.forRoot()` 后，错误消失：

![](https://img-blog.csdnimg.cn/img_convert/cd5770ac5994125cbd9ed1c8c0f21218.png)

https://github.com/manfredsteyer/angular-oauth2-oidc/issues/241

UserAuthEventModule 被 UserAuthModule 所 import：

![](https://img-blog.csdnimg.cn/img_convert/c79c6151ef0b162f7a006ae83e11d939.png)

UserAuthModule 最后通过 index.ts 导出：

![](https://img-blog.csdnimg.cn/img_convert/3e43342d39c8a83958e1e7298a78b204.png)

![](https://img-blog.csdnimg.cn/img_convert/11f7eb651d6a8f2eaaf578dd1d63d007.png)

![](https://img-blog.csdnimg.cn/img_convert/172abbd767c6b017f748f83bb6aeec95.png)

![](https://img-blog.csdnimg.cn/img_convert/4a047d960e78aa91dd9af8d7e05b30c8.png)

遇到新的错误：

> ERROR Error: Uncaught (in promise): NullInjectorError: R3InjectorError(CatalogModule)[EffectsFeatureModule -> InjectionToken @ngrx/effects Feature Effects -> [object Object] -> LanguagesEffects -> SiteConnector -> SiteConnector -> SiteAdapter -> SiteAdapter -> SiteAdapter]: 
  NullInjectorError: No provider for SiteAdapter!
NullInjectorError: R3InjectorError(CatalogModule)[EffectsFeatureModule -> InjectionToken @ngrx/effects Feature Effects -> [object Object] -> LanguagesEffects -> SiteConnector -> SiteConnector -> SiteAdapter -> SiteAdapter -> SiteAdapter]: 
  NullInjectorError: No provider for SiteAdapter!
    at NullInjector.get (core.js:11120:1)
    at R3Injector.get (core.js:11287:1)
    at R3Injector.get (core.js:11287:1)
    at R3Injector.get (core.js:11287:1)
    at injectInjectorOnly (core.js:4770:1)
    at Module.ɵɵinject (core.js:4774:1)
    at Object.SiteConnector_Factory [as factory] (spartacus-core.js:7506:1)
    at R3Injector.hydrate (core.js:11457:1)
    at R3Injector.get (core.js:11276:1)
    at NgModuleRef$1.get (core.js:25352:1)
    at resolvePromise (zone.js:1211:1)
    at resolvePromise (zone.js:1165:1)
    at zone.js:1278:1
    at _ZoneDelegate.invokeTask (zone.js:406:1)
    at Object.onInvokeTask (core.js:28679:1)
    at _ZoneDelegate.invokeTask (zone.js:405:1)
    at Zone.runTask (zone.js:178:1)
    at drainMicroTaskQueue (zone.js:585:1)

![](https://img-blog.csdnimg.cn/img_convert/747660eb7b9cf77308070a7fa79d550c.png)

![](https://img-blog.csdnimg.cn/img_convert/79e882b2d12625f6a9f30743ebe7f841.png)

![](https://img-blog.csdnimg.cn/img_convert/09c1ba3d62bd582aed73bdc21ae74ebf.png)

![](https://img-blog.csdnimg.cn/img_convert/e93146fb651c89803dc742a43d11050e.png)

![](https://img-blog.csdnimg.cn/img_convert/37013cfc14f8fa993e5b911a259980bc.png)

![](https://img-blog.csdnimg.cn/img_convert/df0421a346e39cf7f6eeaec510eceff1.png)

![](https://img-blog.csdnimg.cn/img_convert/cffdae0e3cdfb93363156b227b287a8c.png)

很多 forRoot 方法：

![](https://img-blog.csdnimg.cn/img_convert/93d869137b1fd467764c0386dcf470c2.png)

Minor 版本的更改，意味着我们添加了新功能，但它们默认配置为关闭，以免导致兼容性问题。 新的 Minor 版本还意味着包含可能影响兼容性的更改或错误修复，但这些也由功能标志控制。 因此，所有重大变化都是“选择加入（Opt-in）”。

ITPub博客

将 SAP Spartacus 作为 feature module 进行 Lazy Load 延迟加载时遇到的注入错误分析

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