MongoDB -- 3.2新功能Document Validation

Document Validation

MongoDB provides the capability to validate documents during updates and insertions. Validation rules are specified on a per-collection basis using the validator option, which takes a document that specifies the validation rules or expressions. Specify the expressions using any query operators, with the exception of $geoNear, near,$nearSphere, text, and $where.

Add document validation to an existing collection using the collMod command with the validator option. You can also specify document validation rules when creating a new collection using db.createCollection() with the validator option, as in the following:

下面语句，执行建表，并且通过validator为表增加规则。

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

$or：至少满足一个表达式（http://docs.mongoing.com/manual-zh/reference/operator/query/or.html）
表达式内容：

      [
         { phone: { $type: "string" } },
         { email: { $regex: /@mongodb\.com$/ } },
         { status: { $in: [ "Unknown", "Incomplete" ] } }
      ]

总结：
最终我们了解到，在创建文档时，我们就指定文档中特殊列的规则，对插入和更新操作进行控制。

如下图操作：