角度2とFirebaseは

Question

を提出し、フォーム上のThenableReference例外を投げるあなたがこの問題を解決するために私を助けてくださいすることができます。サービスで

ERROR in /src/app/services/firebase.service.ts (33,12): Type 'ThenableReference' is not assignable to type 'Promise<any>'. 
    Property '[Symbol.toStringTag]' is missing in type 'ThenableReference'.) 

webpack: Failed to compile. 

は私のコード：

コンポーネントで

addBusiness(newBusiness): Promise<any>{ 
    return this.businesses.push(newBusiness); 
    } 

とコード：

addBusiness(
    company:string, 
    category:string, 
    years_in_business:number, 
    description:string, 
    phone:string, 
    email:string, 
    street_address:string, 
    city:string, 
    state:string, 
    zipcode:string 
){ 
    var created_at = new Date().toString(); 

    var newBusiness = { 
     company: company, 
     category: category, 
     years_in_business:years_in_business, 
     description:description, 
     phone:phone, 
     email:email, 
     street_address:street_address, 
     city:city, 
     state:state, 
     zipcode:zipcode, 
     created_at:created_at 
    } 
    this._firebaseService.addBusiness(newBusiness); 
    this.changeState('default'); 
    } 

Answer 1

私のためのこの作品

addBusiness（newBusiness）：プロミス＆ltany＆GT {

this.businesses.push(newBusiness); 
return 

}

Answer 2

2. はPromiseオブジェクトを作成し、あなたのaddBusinessメソッドの戻りfirebase.Thenable代わりに約束を作る

   addBusiness(newBusiness): Promise<any>{ 
       return new Promise(function(resolve, reject){ 
        this.businesses.push(newBusiness) 
         .then(x=>resolve(x), x=>reject(x)); 
       }); 
   }