Is MongoDB a schemaless database? MongoDB offers schema flexibility, not schema absence. While it doesn't require predefined schemas like traditional relational databases, MongoDB provides powerful schema validation capabilities that you can implement based on your needs. The platform maintains system-...
1、定义shcema 在mongoose里一切都由schema开始。每一个schema对应一个mongoDB collection 并且在那个collection里面定义了documents的模型。 var mongoose = require('mongoose'); var Schema = mongoose.Schema; var blogSchema = new Schema({ title: String, author: String, body: String, comments: [{ body: ...
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...
更新架构而不删除 mongodb 中的集合 我的架构如下所示: constUserSchema = Schema({_id:mongoose.Schema.Types.ObjectId,userName:{type:String,required:true,},userPhoneNumber:{type:String,},role:[{type:mongoose.Schema.Types.ObjectId,ref:Role}]}); ...
('database.driver', 'mongodb'); $config->get('database.driver'); // InvalidConfigurationException // Attempting to fetch a non-existent key will result in an `InvalidConfigurationException` $config->get('foo.bar'); // You could avoid this by checking whether that item exists: $config-...
代码示例来源:origin: org.nuxeo.ecm.core/nuxeo-core-storage-mongodb protected List<String> getDocumentTypes() { // TODO precompute in SchemaManager if (documentTypes == null) { documentTypes = new ArrayList<>(); for (DocumentType docType : schemaManager.getDocumentTypes()) { documentTypes.ad...