@umajs/model
v1.0.11
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model validate, class validate, model schema, json schema
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@umajs/class-validator
本项目已重命名为@umajs/class-validator
这是一个基于装饰器的校验库,通过给 class 的属性加上装饰器给属性来加上属性校验。
Installation
npm i -S @umajs/class-validator
Usage
新建 class extends Model 然后加上校验装饰器
【默认】继承 Model,在赋值的时候,值没通过校验的时候是不能给对应的属性赋值的,但是如果想要赋值成功,可以通过
super(false)
越过校验拦截(还是能正常拿到错误信息)
eg1: class Info extends Model { constructor(params: Info, validBlock: boolean) { super(validBlock); } }
eg2: class Info extends Model { constructor(params: Info) { super(false); } }
import { Model, Validate, Type, Required, Min } from '@umajs/class-validator';
class UserInfo extends Model {
constructor({ id, name, age }: UserInfo) {
super();
this.id = id;
this.name = name;
this.age = age;
}
@Type('number')
id: number = 123;
@Required()
name?: string;
@Min(0)
age?: number;
}
执行 Validate
获取获取信息
declare function Validate<T extends Object>(target: T, value?: T): [{
[key: string]: string[];
}, T];
如下:
const [info1, user] = Validate(new UserInfo({ id: 123 }));
console.log('1>>', info1); // >> { name: [ 'not null.' ] }
// 1
const [info2] = Validate(user, { 'id': 456, age: -1 });
console.log('2>>', info2); // >> { age: [ 'min..not lt {0}' ] }
// 2
user.id = 456;
user.name = undefined;
user.age = -2;
const [info3] = Validate(user);
console.log('3>>', info3); // >> { name: [ 'not null.' ], age: [ 'min..not lt {0}' ] }
console.log(JSON.stringify(user));
规则 Rules
参数中可选的 message 是验证不通过的提示信息,本库提供了一套默认的提示信息,可以通过提供的 UpdateMessages 来更改默认的提示信息。
修改提示信息模版 UpdateMessages
export declare function UpdateMessages(params?: {
[P in keyof RuleKeys]?: string;
}): void;
eg: 更改 Range 提示
import { UpdateMessages } from '@umajs/class-validator';
UpdateMessages({
Range: '值必须介于 {0} 和 {1} 之间', // {0}{1} 为占位符,会从 Rule 的参数 ruleParams 中取值
});
必需 Required
declare function Required(message?: string): PropertyDecorator;
类型 Type & Int
export type Types = 'undefined' | 'string' | 'null' | 'number' | 'number' | 'boolean'
| 'date' | 'function' | 'object' | 'array' | 'map' | 'set' | 'symbol' | 'function'
| 'promise' | 'weakset' | 'weakmap' | 'generatorfunction' | 'asyncfunction' | 'object' | 'regexp';
export declare const Type: (t: Types, message?: string) => PropertyDecorator;
export declare const Int: (t: 'int8' | 'int32' | 'int64', message?: string) => PropertyDecorator;
大小 Mix & Max & Range
export declare function Min(n: number, message?: string): PropertyDecorator;
export declare function Max(n: number, message?: string): PropertyDecorator;
export declare function Range(min: number, max: number, message?: string): PropertyDecorator;
长度 MinLength & MaxLength
export declare function MinLength(n: number, message?: string): PropertyDecorator;
export declare function MaxLength(n: number, message?: string): PropertyDecorator;
扩展规则
假设需要扩展一个 Email 规则,示例如下:
export function Email(message: string = messages.MaxLength): PropertyDecorator {
const rule = new Rule({
ruleType: 'Email',
ruleParams: [], // 供提示信息使用
message: '必须为邮件格式,例如"[email protected]"',
validate(value: any): boolean {
if (isEmpley(value)) return true;
return /^[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\.[a-zA-Z0-9_-]+)+$/.test(value);
},
});
return rule.add();
}
转换提示信息格式 MessageTransform
可以通过 MessageTransform 转换提示信息。
- UpdateMessages 是更改提示信息的模版
- MessageTransform 是修改提示信息的格式,此处的提示信息是从信息模版中拿到的信息
export declare function MessageTransform(transFn: (key: string, message: string, ruleType?: string, ruleParams?: any[]) => any): void;
class UserInfo extends Model {
constructor({ name }: UserInfo) {
super();
this.name = name;
}
@Required()
name?: string;
}
export { MessageTransform } from '@umajs/class-validator';
MessageTransform((key: string, message: string, ruleType: string) => {
return {
[ruleType]: message,
}
});
const [info1, user] = Validate(new UserInfo({}));
console.log('1>>', info1); // >> { name: [ { Required: 'not null' } ] }