我正在尝试将自定义密码验证添加到密码字段。密码必须至少包含8个字符,并且至少满足以下两个条件,但不必同时满足所有四个条件:
我已经参与了验证工作,但是遇到一个问题,如果密码长度超过8个字符,但至少不满足以上两个条件,则错误消息将不节目。仅当密码少于8个字符时,才会显示有关字符的错误。
我在SO上进行了搜索,但没有成功实现类似问题的答案。我怀疑我的自定义验证功能与ngModel中的密码不相关的问题。
问题:当密码长度超过8个字符但不满足上述字符要求时,如何显示错误消息并显示在表单字段上?
这是相关的代码。
来自 user-form.html :
<mat-form-field *ngIf="newPassword" fxFlex="100%">
<input matInput #password="ngModel" placeholder="Password" type="password" autocomplete="password"
[(ngModel)]="model.password" name="password" minlength="8" (keyup)="validatePassword(model.password)" required>
<mat-error *ngIf="invalidPassword">
Password must contain at least two of the following: numbers, lowercase letters, uppercase letters, or special characters.
</mat-error>
<mat-error *ngIf="password.invalid && (password.dirty || password.touched)">
<div *ngIf="password.errors.required">
Password is required
</div>
<div *ngIf="password.errors.minlength">
Password must be at least 8 characters
</div>
</mat-error>
</mat-form-field>
来自 user-form.component.ts :
export class UserFormComponent implements OnInit {
@Input()
user: User;
public model: any;
public invalidPassword: boolean;
constructor() {}
ngOnInit() {
this.model = this.user;
}
passwordFails(checks: boolean[]): boolean {
let counter = 0;
for (let i = 0; i < checks.length; i++) {
if (checks[i]) {
counter += 1;
}
}
return counter < 2;
}
validatePassword(password: string) {
let hasLower = false;
let hasUpper = false;
let hasNum = false;
let hasSpecial = false;
const lowercaseRegex = new RegExp("(?=.*[a-z])");// has at least one lower case letter
if (lowercaseRegex.test(password)) {
hasLower = true;
}
const uppercaseRegex = new RegExp("(?=.*[A-Z])"); //has at least one upper case letter
if (uppercaseRegex.test(password)) {
hasUpper = true;
}
const numRegex = new RegExp("(?=.*\\d)"); // has at least one number
if (numRegex.test(password)) {
hasNum = true;
}
const specialcharRegex = new RegExp("[!@#$%^&*(),.?\":{}|<>]");
if (specialcharRegex.test(password)) {
hasSpecial = true;
}
this.invalidPassword = this.passwordFails([hasLower, hasUpper, hasNum, hasSpecial]);
}
}
答案 0 :(得分:0)
您正在将
Private Sub CboTimestamp_AfterUpdate()
Dim myTimestamp As String
myTimestamp = "SELECT * FROM master_demand_table where ([timestamp] = " & Me.Cbotimestamp ")"
Me.Master_Demand_table__subform.Form.RecordSource = myTimestamp
Me.Master_Demand_table__subform.Form.Requery
End Sub
的值传递给build.options
函数
boolean
将功能更改为以下功能,如果密码不符合其中一项条件,则返回true。
passwordFails
在dom中,您可以添加另一个条件来检查invalidPassword
this.invalidPassword = this.passwordFails([hasLower, hasUpper, hasNum, hasSpecial]);
答案 1 :(得分:0)
Component.html
<div class="error-text" *ngIf="myForms.get('password').hasError('passwordStrength')">
{{myForms.get('password').errors['passwordStrength']}}
</div>
Component.ts
this.myForms = fb.group({
password: [null, Validators.compose([
Validators.required, Validators.minLength(8), PasswordStrengthValidator])]
});
password-strength.validators.ts
import { AbstractControl, ValidationErrors } from "@angular/forms"
export const PasswordStrengthValidator = function (control: AbstractControl): ValidationErrors | null {
let value: string = control.value || '';
let msg="";
if (!value) {
return null
}
let upperCaseCharacters = /[A-Z]+/g;
let lowerCaseCharacters = /[a-z]+/g;
let numberCharacters = /[0-9]+/g;
let specialCharacters = /[!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]+/;
if (upperCaseCharacters.test(value) === false || lowerCaseCharacters.test(value) === false || numberCharacters.test(value) === false || specialCharacters.test(value) === false) {
return {
passwordStrength: 'Password must contain at least two of the following: numbers, lowercase letters, uppercase letters, or special characters.'
}
}
}
答案 2 :(得分:0)
我进一步研究了这个问题,看看是否可以弄清楚如何在Angular中使用Validators。我终于可以通过以下更新来做到这一点:
创建 password-validator.directive.ts :
import { Directive, forwardRef, Attribute} from "@angular/core";
import { Validator, AbstractControl, NG_VALIDATORS} from "@angular/forms";
@Directive({
selector: '[validatePassword]',
providers: [
{ provide: NG_VALIDATORS, useExisting: forwardRef(() => PasswordValidator), multi: true}
]
})
export class PasswordValidator implements Validator {
constructor (
@Attribute('validatePassword')
public invalidPassword: boolean
) {}
validate(ctrl: AbstractControl): {[key: string]: any} {
let password = ctrl.value;
let hasLower = false;
let hasUpper = false;
let hasNum = false;
let hasSpecial = false;
const lowercaseRegex = new RegExp("(?=.*[a-z])");// has at least one lower case letter
if (lowercaseRegex.test(password)) {
hasLower = true;
}
const uppercaseRegex = new RegExp("(?=.*[A-Z])"); //has at least one upper case letter
if (uppercaseRegex.test(password)) {
hasUpper = true;
}
const numRegex = new RegExp("(?=.*\\d)"); // has at least one number
if (numRegex.test(password)) {
hasNum = true;
}
const specialcharRegex = new RegExp("[!@#$%^&*(),.?\":{}|<>]");
if (specialcharRegex.test(password)) {
hasSpecial = true;
}
let counter = 0;
let checks = [hasLower, hasUpper, hasNum, hasSpecial];
for (let i = 0; i < checks.length; i++) {
if (checks[i]) {
counter += 1;
}
}
if (counter < 2) {
return { invalidPassword: true }
} else {
return null;
}
}
}
在 user-form.component.html 中更新:
<mat-form-field *ngIf="newPassword" fxFlex="100%">
<input matInput #password="ngModel" placeholder="Password" type="password" autocomplete="password"
[(ngModel)]="model.password" name="password" minlength="8" validatePassword="password" required>
<mat-error *ngIf="password.invalid && (password.dirty || password.touched)">
<div *ngIf="password.errors.invalidPassword">
Password must have two of the four: lowercase letters, uppercase letters, numbers, and special characters
</div>
<div *ngIf="password.errors.required">
Password is required
</div>
<div *ngIf="password.errors.minlength">
Password must be at least 8 characters
</div>
</mat-error>
</mat-form-field>
在 user-form.module.ts 中更新:
import {PasswordValidator} from "../password-validator.directive"; //imported to modules
@NgModule({
imports: [
//some modules
],
declarations: [
// some modules
PasswordValidator // added this to declarations
],
exports: [
// stuff
],
providers: [
//stuff
]
})
export class UserFormModule { }