[英]how to assign the result of snapshot in a variable in firestore angularfire
I just want to check if the email exists then I will get the rest of the doc but I can't seem to assign the result in variable. 我只想检查电子邮件是否存在,那么我将获得其余文档,但似乎无法将结果分配给变量。
this.db.collection('accounts', ref => ref
.where('inviteCode', '==', 'abcd1234')
.get()
.then(querySnapshot => {
const results = [];
querySnapshot.forEach(doc => {
results.push(doc.data());
});
this.myArray = results; // this is my variable
})
.catch(function (error) {
console.log('Error getting documents', error);
}));
I tried using Promise.all(results) but it seems i'm not doing it right. 我尝试使用Promise.all(results),但看来我做得不好。
UPDATE: 更新:
export class FirebaseService {
preloginRef: AngularFirestoreCollection<PreLogin>;
myArray: [];
constructor(private db: AngularFirestore) {
this.preloginRef = db.collection(this.dbPath);
}
codeCheck(inviteCode: string) {
this.db.collection('accounts', ref => ref
.where('inviteCode', '==', inviteCode)
.get()
.then(querySnapshot => {
let that = this;
querySnapshot.forEach(doc => {
that.myArray.push(doc.data());
});
}).catch(function (error) {
console.log('Error getting documents', error);
}));
console.log('result: ' + this.myArray);
}
}
You can try this snippet. 您可以尝试此代码段。
this.db.collection('accounts', ref => ref
.where('inviteCode', '==', 'abcd1234')
.get()
.then(querySnapshot => {
let that = this; // Here you have to assign this scope to any variable
querySnapshot.forEach(doc => {
that.myArray.push(doc.data());
});
console.log(this.myArray);
})
.catch(function (error) {
console.log('Error getting documents', error);
}));
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