You create a new connection and call .model() on it to create the documents on a different database. Virtual properties are document properties that you can get and set but that do not get persisted to MongoDB. The getters are useful for formatting or combining fields, while setters are useful for de-composing a single value into multiple values for storage.
Mongoose colored displeasure, and Irizarry stroked the slick velvet wedge of her head in consolation and restraint. Her four compound and twelve simple eyes glittered and her color softened, but did not change, as she leaned into the caress. The boojum Manfred von Richthofen took care of its own vermin. Mongoose had had to make do with a share of Irizarry’s rations, and she hated eating dead things. Izrael Irizarry stepped through a bright-scarred airlock onto Kadath Station, lurching a little as he adjusted to station gravity.
Raths weren’t sapient, not like cheshires, but they were smart. They knew that the quickest way to kill a human was to take its head off, and the second quickest was to disembowel it, neither of which they could do on all fours. And humans weren’t any threat to a breeder’s vulnerable abdomen; Sanderson’s pistol might give the breeder a hot foot, but there was no way it could penetrate the breeder’s skin. But even they weren’t the danger that had made it hard for Irizarry to sleep the past two rest shifts. What toves tore and raths widened was an access for the apex predator of this alien food chain.
The code fragment below shows how you might find all athletes in a database that play tennis, returning just the fields for athlete name and age. Here we just specify one matching field but you can add more criteria, specify regular expression criteria, or remove the conditions altogether to return all athletes. The code fragment below shows how you might define a simple schema. First you require() mongoose, then use the Schema constructor to create a new schema instance, defining the various fields inside it in the constructor’s object parameter. You can also use create() to define the model instance at the same time as you save it.
You can get the default Connection object with mongoose.connection. Once connected, the open event is fired on the Connection instance. For the Local Library example we’re going to use the Mongoose ODM to access our library data.
The very best performance can be gained by using SQL, or whatever query language is supported by the database. ODM’s are often slower because they use translation code to map between objects and the database format, which may not use the most efficient database queries . When choosing a database, you should consider things like time-to-productivity/learning curve, performance, ease of replication/backup, cost, community support, etc. While there is no single “best” database, almost any of the popular solutions should be more than acceptable for a small-to-medium-sized site like our Local Library. In order to store and retrieve information efficiently, we will store it in a database. Any of several species of generalist predatory Carnivores in the family Herpestidae; the various species range in size from rats to large cats.
A schema can also haveinstance methods, static methods, and query helpers. The instance and static methods are similar, but with the obvious difference that an instance method is associated with a particular record and has access to the current object. Query helpers allow you to extend mongoose’s chainable query builder API (for example, allowing you to add a query “byName” in addition to the find(), findOne() and findById() methods). Mongoose is built on top of the official MongoDB Node.js driver.
At the zoo we care for a pair of lemurs, Felipe and Alana. We feed the lemurs a high-fiber leaf-eater biscuit along with apples, yams, grapes, zucchini, and spinach and other greens. The lemurs’ favorite enrichment items include puzzle feeders, toys, new vines, play pieces to climb on, and interactive digital media such as electronic tablets!
Connect and share knowledge within a single location that is structured and easy to search. mongoose bmx bike started life as a normal Mongoose, but he was experimented on by the High Evolutionary on Wundagore Mountain. He was uplifted into a group of sentient humanoid beings known as the New Men, while retaining many of his animal traits.