正如其github readme中第一句所说”Meet Variety, a Schema Analyzer for MongoDB” Variety能够帮助我们检测我们MongoDB表中的字段类型、分布,并生产报表,可以让我们非常直观的对现有表结构、字段类型进行分析,并找出数据模型中的隐患。 下面我们通过例子来进行讲解: 首先,建立一个表 AI检测代码解析 db.users.insert...
Mongoose stores UUIDs as binary data with subtype 4 in MongoDB.const authorSchema = new Schema({ _id: Schema.Types.UUID, // Can also do `_id: 'UUID'` name: String }); const Author = mongoose.model('Author', authorSchema); const bookSchema = new Schema({ authorId: { type: ...
lies in MongoDB's ability to enforce strict data governance when required while maintaining the agility to evolve your schema without costly migrations. Rather than forcing a one-size-fits-all approach, MongoDB puts you in control of how and when to enforce data rules at the application level...
The following standard JSON types are available: object array number boolean string null Note MongoDB's JSON Schema implementation does not support theintegerJSON type. Instead, use thebsonTypefield withintorlongas the value. enum An array that includes all valid values for the data that the sch...
ofObjectId:[Schema.Types.ObjectId], nested: {stuff: { type: String, lowercase: true, trim: true } } })//exampleusevarThing=mongoose.model('Thing',schema);varm=new Thing; m.name='Statue of Liberty'; m.age=125; m.updated=new Date; ...
总的来说,限制MongoDB的Schema,有两个主要工具: variety:查看collections中各个字段出现的情况 Document Validation:对于表中数据的字段规则进行限定,Error和Warn等级,Error拒绝插入,Warn写日志 正文 大家都知道MongoDB是文档型数据库,是Schema Free的。 那么MongoDB的文档模型能给我们带来哪些好处呢,在这简单列举几个:...
Semantic Types As of version 6.1.0, mongodb-schema has a new feature called "Semantic Type Detection". It allows to override the type identification of a value. This enables users to provide specific domain knowledge of their data, while still using the underlying flexible BSON representation an...
MongoDB has a flexible schema model, which means that some fields may contain different types of data from one document to the next. For example, a field named address may contain strings and integers in some documents, objects in others, or some combination of all three. ...
removeIndex only removes indexes from your schema object. Doesnotaffect the indexes in MongoDB. Example: constToySchema=newSchema({name:String,color:String,price:Number});// Add a new index on { name, color }ToySchema.index({name:1,color:1});// Remove index on { name, color }// Ke...
在mongodb中通过 type: Schema.Types.ObjectId,ref:"User" ,建立两个表用 _id 进行关联的逻辑。 ref 说明 ObjectId是在那个数据表中。 var ArticleSchema = new Schema( { title: String, content: String, author: String, tag: String, views:{ type: Number, default: 0, } }, { timestamps: tru...