Question

这是我尝试调用上下文以使用身份验证令牌但显示错误的云函数。

exports.checkCollege = functions.https.onCall((data,context)=>{ 

                  if(context.auth.token.moderator !== true){
                     return{
                        error:"Request not authorized. User must be a moderator to fulfill the request."
                     };
                  }
               const email = data.email;
              return grantModeratorRole(email).then(()=>{
                 return {
                    result: `Request fulfilled! ${email} email is now a moderator!`
                 }
              })
            })

正在显示这种类型的错误：

src/index.ts:65:10 - error TS2532: Object is possibly 'undefined'.

65       if(context.auth.token.moderator !== true){
            ~~~~~~~~~~~~


Found 1 error.

npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! functions@ build: `tsc`
npm ERR! Exit status 2
npm ERR! 
npm ERR! Failed at the functions@ build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

Answer 1

上下文对象的TypeScript定义是这样的：

/**
 * The interface for metadata for the API as passed to the handler.
 */
export interface CallableContext {
    /**
     * The result of decoding and verifying a Firebase Auth ID token.
     */
    auth?: {
        uid: string;
        token: firebase.auth.DecodedIdToken;
    };
    /**
     * An unverified token for a Firebase Instance ID.
     */
    instanceIdToken?: string;
    /**
     * The raw request handled by the callable.
     */
    rawRequest: Request;
}

如您所见，auth属性使用问号标记为可选。这意味着它可能是不确定的。 TypeScript告诉您，在访问该案例之前需要检查该案例，以避免在运行时出现错误：

if (context.auth) {
    if (context.auth.token.moderator) {
        // ...
    }
}

我在可调用函数中使用“上下文”时，firebase云函数显示错误

1 个答案: