未捕获（承诺）：错误：Firebase.update失败：第一个参数

Question

我试图更新一个frebase节点，但我总是得到

  

未捕获（承诺）：错误：Firebase.update失败：第一个参数

我认为问题可能是currCount输出为未定义，因为我在应用程序的其他部分使用相同的功能并且工作正常。

这是我的代码：

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//With this Im trying to update a node adding +1  
  async addCountRegs(company: string): firebase.Promise<any>{
    var currCount;

    await this.authData.getCountRegs(company)
    .then((countregs:any) => {  
        currCount = countregs.value;
    });   

    console.log('currCount = ' + currCount);

    var regsData = {
      countregs: currCount + 1
    };

    var updates = {};
    updates['/companies/' + company] = regsData;  

    return this.afDB.database.ref().update(updates);

  }
  
//This is the function that should return the current value
async getCountRegs(company: string){
      let firstRef = this.db.object(`companies/${company}`, {preserveSnapshot:true});
      let promise = new Promise((resolve, reject) => {
          firstRef.subscribe(snapshot => {
                let a = snapshot.exists();
                if(a) {
                    resolve(snapshot.child("countregs").val());
                }
                });
      
            });
            return promise;
}


//And this is the function wich works so Im not having any issue with this one but you might wanna check it out
async maxRegsReached(company: string): Promise<any> {
  var count;
  var max;

  await this.getCountRegs(company)
      .then((usersRef:any) => {  
          count = usersRef;
  });          

  await this.getMaxRegs(company)
      .then((usersRef:any) => {  
          max = usersRef;
  });  

  console.log('count = ' + count);
  console.log('max = ' + max);

  if (count >= max){
    console.log('true');
    return true;
  } else {
    console.log('false');
    return false;
  }
}

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Answer 1

解决！

  async addCountRegs(company: string){
    var currCount;

    await this.authData.getCountRegs(company)
    .then((countregs:any) => {  
        currCount = countregs;
    });   

    console.log('currCount = ' + currCount);
 
    let endpoint = this.afDB.object(`/companies/${company}/countregs`); 

    endpoint.set(currCount + 1);

  }