Some typescript decorators, like spring-validation and so on.

• Setup
• Example
• like java spring validation
  • Null value validator
  • Boolean validator
  • Number validator
  • String validator
  • Time validator
• Enum validator
• Type validator
• Custom validator

Setup

npm i @bpframework/validation

set config in tsconfig.json

"experimentalDecorators": true,
"emitDecoratorMetadata": true,

Example

import {NotNull, Type} from '@bpframework/validation';

class BeanA {
  @NotNull
  @Type.Boolean
  a: boolean = null;
}

// will throw a exception: 
//  - febs.exception('message', febs.exception.PARAM, __filename, __line, __column);
let obj = new BeanA();

// will throw a exception
obj.a = null;
obj.a = undefined;

!!!WARNING: The following code does not trigger a validity check

class BeanA {
  @NotNull
  a: boolean;
}

// No exception is thrown.
let obj = new BeanA();

// Will throw a exception (trigger by settter)
obj.a = null;

All validate decorators have a corresponding array validation method
, e.g. @Max.List use to validator array

like java spring validation

Null value validator

名称	作用	例子
@Null	must be null or undefined.	@Null({message: "must is null"})
@NotNull	cannot be null or undefined.	@NotNull({message: "cannot be null"})
@NotBlank	must contain a non-null char trim(str).length>0	@NotBlank
@NotEmpty	cannot be null or undefined, and the length is greater then 0 (o.size() > 0 或 o.length > 0)	@NotEmpty
@Size({max:number, min:number})	check the length of a string or array (o.size() 或 o.length)

Boolean validator

名称	作用	例子
@AssertFalse	must be false	@AssertFalse({message: "must be false"})
@AssertTrue	muse be true	@AssertTrue({message: "muse be true"})

Number validator

名称	作用	例子
@DecimalMax({value:number ¦ string})	Number value must be less than or equal to the specified value	@DecimalMax({value:1000, message: "error"})
@DecimalMin({value:number ¦ string})	Number value must be greater than or equal to the specified value	@DecimalMin({value:0, message: "error"})
@Max({value:number ¦ string})	Integer value must be less than or equal to the specified value.	@Max({value:1000, message: "error"})
@Min({value:number ¦ string})	Integer value must be greater than or equal to the specified value.	@Min({value:1000, message: "error"})
[unsupported] @Digits({integer:number, fraction:number})	unsupported	@Digits({integer:5, fraction:1})
@Negative	Number value must be negative
@NegativeOrZero	Number value must be negative or zero
@Positive	Number value must be positive
@PositiveOrZero	Number value must be positive or zero
@Range({min:number=0, max:number})	check the range of number value

String validator

名称	作用	例子
@Email({regexp:RegExp})	Whether the specified value is Email. You can specify a regular	@Email({regexp:/.*/})
@Pattern({regexp:RegExp})	Whether the specified value matches regular	@Pattern({regexp:/.*/})

Time validator

名称	作用	例子
@Future	Date value is the future time
@FutureOrPresent	Date value is the future time or now
@Past	Date value is the past time
@PastOrPresent	Date value is the past time or now

Enum validator

名称	作用
@Enum({allows: [v1, v2, v3, ...]})	Verify the value is one of the allowed values.
@Type.Enum({enumType: EnumName})	Verify the value is enum type.

@Type.Enum example:

import {Type} from '@bpframework/validation';

enum Enum1 {
  a = '2323',
  b = 'xxxx'
}

class BeanA {
  @Type.Enum({enumType: Enum1 })
  a: any = null;
}
let obj = new BeanA();

obj.a = Enum1.a;  // ok.
obj.a = Enum1.b;  // ok.
obj.a = 1;  // will throw a exception.

Type validator

名称	作用
@Type.Boolean	Verify that the value is a Boolean.
@Type.Number	Verify that the value is a Number.
@Type.Integer	Verify that the value is a Integer.
@Type.BigInt	Verify that the value is a Big-Integer.
@Type.String	Verify that the value is a String.
@Type.Date	Verify that the value is a Date or Date-string.
@Type.Object	Verify that the value is a Object.
@Type.Array	Verify that the value is a Array.

Custom validator

名称	作用
@Type.Validator	Custom validator.

// validator value == 1
@Type.Validator({
  checkCB(value:any) {
    if (value !== 1) return false;
  }
})
value: number;