Nodejs operation mongodb fifth (data verification)

1. Introduction to data verification

mysqlCommon data verification at the database level, non-empty fields

Second, mongoosethe built-in data verification

• 1. requiredIndicates that this data must be passed in
• 2. maxFor Numbertype data, the maximum allowable value
• 3. minFor Numbertype data, the minimum allowed value
• 4. enumEnumeration type, the data must meet one of the enumeration values
• 5. Regular rules that matchmust be met to increase datamatch
• 6. maxlengthMaximum length
• 7. minlengthMinimum length

Three, schemause data verification in

• 1. Definitionschema

  const mongoose = require('./db');
  
  const userSchema = mongoose.Schema({
        
        
      name: {
        
        
          type: String,
          require: [true, '此项为必填内容'], // 需要自己去写获取其中的错误
          minlength: [3, '名字最小长度为3'],
          maxlength: [10, '名字最长为10'],
      },
      age: {
        
        
          type: Number,
          max: 150,
          min: 0,
      },
      status: {
        
        
          type: String,
          enum: ['0', '1', '2']
      },
      phone: {
        
        
          type: Number,
          match: /^1[3456789]\d{9}$/
      }
  })
  
  module.exports = mongoose.model('User', userSchema, 'user');
  

• 2. Data verification when adding data

  const UserModel = require('./model/user');
  
  const user = new UserModel({
        
        
      name: '李四',
      age: 20,
      status: 3,
      phone: 181706066
  });
  
  user.save((err) => {
        
        
      if (err) {
        
        
         console.log('-------遍历全部的错误开始---------')
         Object.keys(err.errors).forEach(item => {
        
        
             console.log(err.errors[item].message);
         })
         console.log('-------遍历全部的错误结束---------')
      } else {
        
        
          console.log('增加数据成功');
      }
  });
  

Four, custom validator

• 1. schemaDefined in

  const mongoose = require('./db');
  
  const userSchema = mongoose.Schema({
        
        
      address: {
        
        
          type: String,
          require: true,
          // 方式一：简单定义
          // 自定义的验证器，如果通过验证返回 true，没有通过则返回 false
          // validate: function (desc) {
        
        
          //     return desc.length >= 10;
          // },
          // 方式二:需要定义错误提示的方式
          validate: {
        
        
              validator: function(desc) {
        
        
                  return desc.length >= 10;
              },
              message: '长度必须大于10',
          }
      }
  })
  
  module.exports = mongoose.model('User', userSchema, 'user');
  

• 2. The checksum is the same as above