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最近接触EGG框架，刚接触，其中涉及到验证参数的一些运用，网上找的egg-validate 都不是很好用，最后找到了parameter插件，挺好用，推荐给大家，直接上代码。

'use strict';
const Controller = require('egg').Controller;
const Parameter = require('parameter');
const Check = new Parameter();
class LogserviceController extends Controller {

   async get() {
        const ctx = this.ctx;
        const {request,validator,service,constant} = ctx;
        if(typeof(request.body.type) != 'undefined') request.body.type = Number(request.body.type);
        if(typeof(request.body.curpage) != 'undefined') request.body.curpage = Number(request.body.curpage);

        const rule = {
            'start_time': {type:'date',required: false,max:10,allowEmpty: true},
            'end_time':{type:'date',required: false,max:10,allowEmpty: true},
            'type':{type:'enum',required: true,values:[0,200,404,500]},
            'curpage' : {type:'number',required: true},
        };

        const errors  = Check.validate(rule,request.body);

        if(errors == undefined){
            

            //当errors等于undefined 的时候，表示参数验证通过，这里写自己的业务逻辑

        }else
        {
            this.ctx.body = errors;
        }
    }
    
}
module.exports = LogserviceController;    

通过 npm install parameter –save 命令来安装，下面是更多的关于rule的规则。

Rule

common rule

• required – if required is set to false, this property can be empty. default to true.
• type – The type of property, every type has it’s own rule for the validate.

int

If type is int, there has tow addition rules:

• max – The maximum of the value, value must <= max.
• min – The minimum of the value, value must >= min.

integer

Alias to int.

number

If type is number, there has tow addition rules:

• max – The maximum of the value, value must <= max.
• min – The minimum of the value, value must >= min.

date

The date type want to match YYYY-MM-DD type date string.

dateTime

The dateTime type want to match YYYY-MM-DD HH:mm:ss type date string.

datetime

Alias to dateTime.

id

The id type want to match /^\d+$/ type date string.

boolean

Match boolean type value.

bool

Alias to boolean

string

If type is string, there has four addition rules:

• allowEmpty(alias to empty) – allow empty string, default to false.
• format – A RegExp to check string’s format.
• max – The maximum length of the string.
• min – The minimum length of the string.

email

The email type want to match RFC 5322 email address.

• allowEmpty – allow empty string, default is false.

password

The password type want to match /^$/ type string.

• compare – Compare field to check equal, default null, not check.
• max – The maximum length of the password.
• min – The minimum length of the password, default is 6.

url

The url type want to match web url.

enum

If type is enum, it requires an addition rule:

• values – An array of data, value must be one on them. this rule is required.

object

If type is object, there has one addition rule:

• rule – An object that validate the properties ot the object.

array

If type is array, there has four addition rule:

• itemType – The type of every item in this array.
• rule – An object that validate the items of the array. Only work with itemType.
• max – The maximun length of the array.
• min – The minimun lenght of the array.

abbr

• 'int' => {type: 'int', required: true}
• 'integer' => {type: 'integer', required: true}
• 'number' => {type: 'number', required: true}
• 'date' => {type: 'date', required: true}
• 'dateTime' => {type: 'dateTime', required: true}
• 'id' => {type: 'id', required: true}
• 'boolean' => {type: 'boolean', required: true}
• 'bool' => {type: 'bool', required: true}
• 'string' => {type: 'string', required: true, allowEmpty: false}
• 'email' => {type: 'email', required: true, allowEmpty: false, format: EMAIL_RE}
• 'password' => {type: 'password', required: true, allowEmpty: false, format: PASSWORD_RE, min: 6}
• 'object' => {type: 'object', required: true}
• 'array' => {type: 'array', required: true}
• [1, 2] => {type: 'enum', values: [1, 2]}
• /\d+/ => {type: 'string', required: true, allowEmpty: false, format: /\d+/}