Mongo Document 校验

Mongo Datamodel Validation

mongo insert,update document时候的校验规则

指定validation rules

• new collection
  
  db.createCollection(...,{validator:})
• existing collection
  
  collMod command

json schema (version >=3.6)

$jsonSchema匹配满足指定的JSON Schema

语法

{ $jsonSchema: <JSON Schema object> }

例如

 db.createCollection("students", {
   validator: {
      $jsonSchema: {
         bsonType: "object",
         required: [ "name", "year", "major", "address" ],
         properties: {
            name: {
               bsonType: "string",
               description: "must be a string and is required"
            },
            year: {
               bsonType: "int",
               minimum: 2017,
               maximum: 3017,
               description: "must be an integer in [ 2017, 3017 ] and is required"
            },
            major: {
               enum: [ "Math", "English", "Computer Science", "History", null ],
               description: "can only be one of the enum values and is required"
            },
            gpa: {
               bsonType: [ "double" ],
               description: "must be a double if the field exists"
            },
            address: {
               bsonType: "object",
               required: [ "city" ],
               properties: {
                  street: {
                     bsonType: "string",
                     description: "must be a string if the field exists"
                  },
                  city: {
                     bsonType: "string",
                     "description": "must be a string and is required"
                  }
               }
            }
         }
      }
   }
})

其它查询表达式

除$near,$nearSphere,$text,$where外

db.createCollection( "contacts",
   { validator: { $or:
      [
         { phone: { $type: "string" } },
         { email: { $regex: /@mongodb\.com$/ } },
         { status: { $in: [ "Unknown", "Incomplete" ] } }
      ]
   }
} )

行为

validation 在insert,update 触发,collection新添加 validation，之前的document不会触发校验

validationlevel

validationlevel用来决定对于校验，mongo采用什么样的操作

• strict(default)

应用校验到所有insert,update

• moderate

应用校验到满足校验的document

• off

关闭校验

validationaction

validationaction是mongo用来决定在没有通过校验时做什么操作

• error (default)

拒绝所有违反校验的insert,update

• warn

mongo会记录下来但会让其通过校验

不能在admin,local,config库和system.*集合中设置校验