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). 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. Among more social mongoose species, pups are introduced into the colony from an early age.
The creature is able to hold its ground against dangerous predators much larger or more aggressive than itself. Being able to kill snakes (even venomous species!) is only one example. These animals can also sometimes evade or bamboozle deadly predators with its impressive speed and agility. Mongooses live in burrows and are nondiscriminatory predators, feeding on small animals such as rodents, birds, reptiles, frogs, insects, andworms.
This squirrel-sized mongoose is the smallest of the African mongooses. It is short and stocky, with a blunt, pointed muzzle and long tail. Dwarf mongooses live throughout much of sub-Saharan Africa in a wide variety of woodlands, thickets and savanna habitats.
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. The example in the documentation constructs a full name virtual property from a first and last name field, which is easier and cleaner than constructing a full name every time one is used in a template.
The Hindu god of wealth, Kubera is often portrayed holding a in his left hand, hence the sight of a mongoose is considered lucky by some. In ancient Mesopotamia, mongooses were sacred to the deity Ninkilim, who was conflated with Ningirama, a deity of magic who was invoked for protection against serpents. Genetic research based on nuclear and mitochondrial DNA analyses revealed that the Galidiinae are more closely related to Madagascar carnivores, including the fossa and Malagasy civet.
A dominant female and her male consort, usually the oldest animals in the group, are the leaders of the group. The rest of the group is composed of family members, generally older offspring of the dominant pair. Each year the alpha female produces three litters of young, with two to four infants in each litter. The huffy mountain bike young of the dominant female are second in the group’s social system, tended for and cosseted by subordinate members. However, this status is immediately lost upon the arrival of a new litter. The babysitters, who guard and defend the young, often change during the day so that individuals may forage for food.
Famously, some species of mongoose will boldly attack venomous snakes such as cobras. The most celebrated of these is Rudyard Kipling’s fictional Rikki-tikki-tavi, based on an ancient fable and included in The Jungle Book. Ranging in size from the 7-inch-long dwarf mongoose to the 2-foot-long Egyptian mongoose; these sleek mammals have long bodies with short legs and tapered snouts.
Schemas are then “compiled” into models using the .model() method. Once you have a model you can use it to find, create, update, and delete objects of the given type. The Schema allows you to define the fields stored in each document along with their validation requirements and default values.