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我有一個困難時期試圖設置使用Angular2驅動方法的數據的最大值。 我想輸入的最大值設置爲一個名爲userLimit財產,這是我從火力得到。這是我的代碼:使用屬性爲Angular2形式驗證(數據驅動)
component.ts
import { Component, OnInit, AfterViewInit } from '@angular/core';
import { FormBuilder, FormGroup, Validators, FormControl } from "@angular/forms";
import { FiredbService } from '../services/firedb.service';
import { AuthService } from '../services/auth.service';
import { AngularFireDatabase, FirebaseListObservable, FirebaseObjectObservable } from 'angularfire2/database';
@Component({
selector: 'my-dashboard',
styleUrls: ['./recibirpago.component.scss'],
templateUrl: './recibirpago.component.html'
})
export class RecibirpagoComponent implements OnInit, AfterViewInit {
myForm2: FormGroup;
uid: string;
userLimit: any;
constructor(private fb: FormBuilder,
private dbfr: FiredbService,
private db: AngularFireDatabase,
private authService: AuthService) {
this.myForm2 = this.fb.group({
email: ['', Validators.email],
clpmount: ['', [Validators.required, Validators.max(this.userLimit)]]
});
}
ngOnInit() {
this.uid = this.authService.getUserUid();
}
ngAfterViewInit() {
this.dbfr.getUserLimit(this.uid).subscribe(snapshot => {
this.userLimit = snapshot.val().accountLimit;
console.log(this.userLimit);
})
}
如果我寫,例如,Validators.max(5000)它的工作原理,但如果我嘗試從火力地堡獲取數據這是行不通的。
感謝您的幫助!
嘗試獲得userLimit的價值,你的formbuilder在構造函數 – JayDeeEss