错误:“无法解析 e: (?) 的所有参数." [英] Error: "Can't resolve all parameters for e: (?)."

问题描述

在使用 angular-cli 部署到 github-pages 后，我遇到了这种错误:

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错误:无法解析 e: (?) 的所有参数."

本地应用程序有效.您建议采取哪些步骤来找到问题所在?

尝试使用 angular-cli beta29 和 beta30.

UPD:出于测试目的，我已从应用程序中删除了路由器.不是，我只有一个猜测，它与 DI 有关系.

UPD2(找到地方):

问题在于覆盖RequestOptions，所以这样做:

导出类 RequestOptionsService 扩展 RequestOptions {}

对于提供者定义:

{ 提供:RequestOptions, useClass: RequestOptionsService },

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这对我来说仍然是一个问题.

• 不要覆盖 RequestOptions 构造函数 - 错误.
• 用空参数覆盖 RequestOptions 构造函数 - 没有错误
• 用参数覆盖RequestOptions构造函数 - 错误

这是我如何覆盖构造函数的方式:

constructor(options?: RequestOptionsArgs) {超级(选项)；}

这里有什么问题?

UPD3(解决了自己的案例):

问题确实出在 RequestOptions 上，所以你不应该这样做:

导出类 RequestOptionsService 扩展 RequestOptions {}

但仅限:

导出类 RequestOptionsService 扩展 BaseRequestOptions {}

解决方案

请确保:

• 你的 tsconfig.js
中有 "emitDecoratorMetadata": true
• 每个服务都不缺少@Injectable() 装饰器
• components 构造函数注入您的服务(将它们作为参数)

I have such kind of error after deployment to github-pages with angular-cli:

Error: "Can't resolve all parameters for e: (?)."

Local application works. What steps would you recommend to do to find the problem place?

Tried with angular-cli beta29 and beta30.

UPD: I've removed Router from the application for testing purposes. Not I have only one guess that it's something with DI.

UPD2(FOUND THE PLACE):

The problem is with overwriting RequestOptions, so do:

export class RequestOptionsService extends RequestOptions {}

and for provider definition:

{ provide: RequestOptions, useClass: RequestOptionsService },

It's still a question for me.

• do not overwrite RequestOptions constructor - error.
• overwrite RequestOptions constructor with empty parameter - no error
• overwrite RequestOptions constructor with parameters - error

This is the way how I overwrite the constructor:

constructor(options?: RequestOptionsArgs) {
  super(options);
}

What could be wrong here?

UPD3(Solved own case):

The problem indeed was with RequestOptions, so you should not do:

export class RequestOptionsService extends RequestOptions {}

but only:

export class RequestOptionsService extends BaseRequestOptions {}

解决方案

Make sure:

• you have "emitDecoratorMetadata": true in your tsconfig.js
• every service is not missing @Injectable() decorator
• components constructor injects your services (have them passed as parameters)

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