Each model keeps a reference to a native MongoDB driver collection. The collection object can be accessed using YourModel.collection. However, using the collection object directly bypasses all mongoose features, including hooks, validation, etc.
It also briefly shows a few of the main ways in which you can access model data. You can create references from one document/model instance to another using the ObjectId schema field, or from one document to many using an array of ObjectIds. If huffy mountain bike you need the actual content of the associated document, you can use the populate() method in a query to replace the id with the actual data. You can search for records using query methods, specifying the query conditions as a JSON document.
As Irizarry watched, one blundered into the lure of a tove, and the tove contracted with sudden convulsive force. Hypochondria, he told himself firmly, aware that that was the wrong word and not really caring. But as he dropped down onto his belly again, to squeeze through a tiny access point—this one clogged with the fresh corpses of newly-slaughtered toves—he needed all the comfort he could invent. The only thing that stank more than a pile of live toves was a bunch of half-eaten ones. Short of a bandersnatch—and that could still be along any time now, don’t forget, Irizarry—a breeding rath was the worst news they could have. The size of the tove colony might make her nervous, but Mongoose loved the smell—like a good dinner heating, Irizarry imagined.
It’s not known exactly how the mongooses orchestrate reproducing at the same time — sometimes it can involve as many as 12 female mongooses. One hypothesis, Marshall and Cant said, is that dominant females produce a pheromone that acts as a cue. However, as birth happens in an underground den it has not been possible to observe the synchronized arrivals. Once the pups emerge from the den, they form one-to-one caring relationships with adults, called escorts, who can be any adult male or female. Once they emerge from the den, they form caring relationships with another adult, called an escort. The vast majority of expectant mongoose moms within a group give birth on the same night.
We can also do this using a where() function, and we can chain all the parts of our query together using the dot operator (.) rather than adding them separately. The code fragment below is the same as our query above, with an additional condition for the age. If you specify a callback, as shown above, the query will execute immediately. This is used to specify whether the field must be supplied in order to save a document. In the case above we just have two fields, a string and a date. In the next sections, we will show some of the other field types, validation, and other methods.
Rapidly develop robust enterprise capabilities based on your needs. Whether you need an intuitive consumer-grade web interface or a high-productivity form, Mongoose can help create the right experience with minimal coding. Producing feature-rich applications that are automatically upgradeable and deployable on-premises or in the cloud, Mongoose is a low-cost, unified development platform. Additionally, if you like to move in and out of the stereo field, for example, going wide to add excitement to a chorus, you can automate the width of both the Low and High sections.
She is the Hugo, Sturgeon, Locus, and Campbell Award winning author of over 25 novels, most recently The Red-Stained Wings and over a hundred short stories. She lives in Massachusetts with her partner, writer Scott Lynch, three adventurous cats, and an elderly and opinionated dog. “There were Arkhamers trapped there, too, in their huge old scow of a ship. And when the water rationing got tight, there were people that said the Arkhamers shouldn’t have any—said that if it was the other way ‘round, they wouldn’t give us any. And so when the Arkhamers sent one of their daughters for their share .
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.