|
| 1 | +# NgxBeanValidation |
| 2 | + |
| 3 | +> Idea was taken from [Bean Validation](https://beanvalidation.org/) |
| 4 | +
|
| 5 | +1. [Supports](#supports) |
| 6 | +2. [Install](#install) |
| 7 | +3. [What is the problem?](#what-is-the-problem) |
| 8 | +4. [Contains](#contains) |
| 9 | +5. [Does not support](#does-not-support) |
| 10 | +6. [Contributing](#contribution) |
| 11 | + |
| 12 | +## Supports |
| 13 | +From Angular 5. |
| 14 | + |
| 15 | +## Install |
| 16 | +Install with npm |
| 17 | + |
| 18 | +`npm install ngx-bean-validation --save-dev` |
| 19 | + |
| 20 | +## What is the problem? |
| 21 | + |
| 22 | +Reactive forms are very powerful, but they become painful for big forms: |
| 23 | +```typescript |
| 24 | +class Component { |
| 25 | + private userForm: FormGroup = this.formBuilder.group({ |
| 26 | + email: ['', Validators.compose([Validators.required, Validators.email])], |
| 27 | + name: ['', Validators.compose([Validators.required, Validators.minLength(3), Validators.maxLength(40)])], |
| 28 | + age: ['', Validators.compose([Validators.number, Validators.min(18), Validators.max(60)])], |
| 29 | + creditCards: [{ |
| 30 | + cardNumber: ['', Validators.compose(Validators.isCreditCard, Validators.isMasterCard)], |
| 31 | + date: ['', Validators.compose([Validators.required, Validators.pattern(/^(0[1-9]|1[0-2])\/?([0-9]{4}|[0-9]{2})$/)])], |
| 32 | + cvv: ['', Validators.compose([Validators.required, Validators.pattern(/^[0-9]{3,4}$/)])] |
| 33 | + }], |
| 34 | + address: { |
| 35 | + addressLine1: ['', Validators.required], |
| 36 | + addressLine2: '', |
| 37 | + city: ['', Validators.required], |
| 38 | + region: ['', Validators.required], |
| 39 | + zip: ['', Validators.compose([Validators.required, Validators.pattern(/^\d{5}(?:[-\s]\d{4})?$/)])], |
| 40 | + country: ['', Validators.required] |
| 41 | + }, |
| 42 | + deliveryDate: ['', Validators.compose([Validators.required, Validators.isDate, Validators.dateBefore(someValue), Validators.dateAfter(someValue)])] |
| 43 | + }); |
| 44 | +} |
| 45 | +``` |
| 46 | + |
| 47 | +instead of this huge unreadable peace of code, I recommend using Bean Validation approach |
| 48 | +```typescript |
| 49 | +class User { |
| 50 | + @Email() |
| 51 | + @Required() |
| 52 | + email: string; |
| 53 | + |
| 54 | + @MaxLength(40) |
| 55 | + @MinLength(3) |
| 56 | + @Required() |
| 57 | + name: string; |
| 58 | + |
| 59 | + @Max(60) |
| 60 | + @Min(18) |
| 61 | + @Number() |
| 62 | + @Required() |
| 63 | + age: number; |
| 64 | + |
| 65 | + @NestedArray() |
| 66 | + creditCards: CreditCard[] = [new CreditCard()]; |
| 67 | + |
| 68 | + @Nested() |
| 69 | + address: Address = new Address(); |
| 70 | + |
| 71 | + @DateAfter(new Date()) |
| 72 | + @DateBefore(new Date()) |
| 73 | + @IsDate() |
| 74 | + @Required() |
| 75 | + deliveryDate: string; |
| 76 | +} |
| 77 | + |
| 78 | +class CreditCard { |
| 79 | + @IsMasterCard() |
| 80 | + @IsCreditCard() |
| 81 | + @Required() |
| 82 | + cardNumber: string; |
| 83 | + |
| 84 | + @Pattern(/^(0[1-9]|1[0-2])\/?([0-9]{4}|[0-9]{2})$/) |
| 85 | + @Required() |
| 86 | + date: string; |
| 87 | + |
| 88 | + @Pattern(/^[0-9]{3,4}$/) |
| 89 | + @Required() |
| 90 | + cvv: string; |
| 91 | +} |
| 92 | + |
| 93 | +class Address { |
| 94 | + @Required() |
| 95 | + addressLine1: string; |
| 96 | + |
| 97 | + @EmptyControl() |
| 98 | + @Required() |
| 99 | + addressLine2: string; |
| 100 | + |
| 101 | + @Required() |
| 102 | + city: string; |
| 103 | + |
| 104 | + @Required() |
| 105 | + region: string; |
| 106 | + |
| 107 | + @Pattern(/^\d{5}(?:[-\s]\d{4})?$/) |
| 108 | + @Required() |
| 109 | + zip: string; |
| 110 | + |
| 111 | + @Required() |
| 112 | + country: string; |
| 113 | +} |
| 114 | + |
| 115 | +class Component { |
| 116 | + private userForm: FormGroup = new BeanFormGroup<User>(new User()); |
| 117 | +} |
| 118 | +``` |
| 119 | + |
| 120 | +Now we can use our classes as interface and reuse them for reactive forms. |
| 121 | + |
| 122 | +## Contains: |
| 123 | + |
| 124 | +This library provides `BeanFormGroup` class for creation `FormGroup` from annotated classes. |
| 125 | + |
| 126 | +### Annotations for default angular validators: |
| 127 | +* Email |
| 128 | +* Max |
| 129 | +* MaxLength |
| 130 | +* Min |
| 131 | +* MinLength |
| 132 | +* Required |
| 133 | +* RequiredTrue |
| 134 | +* Pattern |
| 135 | + |
| 136 | +### Annotation for empty form control: |
| 137 | +* EmptyControl |
| 138 | + |
| 139 | +### Annotation for nested FormGroup and FormArray: |
| 140 | +* Nested |
| 141 | +* NestedArray |
| 142 | + |
| 143 | +### Annotation for disabling form control: |
| 144 | +* Disabled |
| 145 | + |
| 146 | +### Function that helps you create your own validator annotation: |
| 147 | +* setSyncValidator |
| 148 | + |
| 149 | +## How to use: |
| 150 | +Example how to create your own validator annotation: |
| 151 | +```typescript |
| 152 | +import {AbstractControl, ValidationErrors, ValidatorFn} from '@angular/forms'; |
| 153 | +import {setSyncValidator, AnnotationFunction} from 'ngx-bean-validation'; |
| 154 | + |
| 155 | +const customAngularValidator = (someValue: any): ValidatorFn => { |
| 156 | + return (control: AbstractControl): ValidationErrors => { |
| 157 | + return { |
| 158 | + custom: 'Custom validator' |
| 159 | + }; |
| 160 | + }; |
| 161 | +}; |
| 162 | + |
| 163 | +export const CustomValidator = (someValue: any): AnnotationFunction => (target: object, key: string): void => { |
| 164 | + setSyncValidator(target, key, customAngularValidator(someValue)); |
| 165 | +}; |
| 166 | +``` |
| 167 | + |
| 168 | +Now you can put it in your class: |
| 169 | +```typescript |
| 170 | +import {CustomValidator} from './custom-validator'; |
| 171 | + |
| 172 | +class User { |
| 173 | + @CustomValidator('someValue') |
| 174 | + name: string |
| 175 | +} |
| 176 | +``` |
| 177 | + |
| 178 | +And create form group: |
| 179 | +```typescript |
| 180 | +import {FromGroup} from '@angular/forms'; |
| 181 | +import {User} from './user'; |
| 182 | +import {BeanFormGroup} from 'ngx-bean-validation'; |
| 183 | + |
| 184 | +class Component { |
| 185 | + userForm: FromGroup = new BeanFormGroup(new User()) |
| 186 | +} |
| 187 | +``` |
| 188 | + |
| 189 | +## Does not support |
| 190 | +* Async validators |
| 191 | +* FormControl and FormArray them self, only inside FormGroup |
| 192 | + |
| 193 | +## Contribution |
| 194 | +Are very welcome! Please share your ideas and improvements. |
0 commit comments