CRUD Operations:
CRUD (Create, Read, Update, Delete) is an acronym for ways one can operate on stored data. It is a mnemonic for the four basic functions of persistent storage. CRUD typically refers to operations performed in a database or datastore, but it can also apply to higher level functions of an application such as soft deletes where data is not actually deleted but marked as deleted via a status.
RESTful APIs
The acronym CRUD also appears in discussion of RESTful APIs. Each letter in the acronym may be mapped to a Hypertext Transfer Protocol (HTTP) method:
• CRUD => HTTP
• Create = PUT
• Read = GET
• Update = PUT
• Delete = DELETE
JSON web token
A JSON web token(JWT) is JSON Object which is used to securely transfer information over the web(between two parties). It can be used for an authentication system and can also be used for information exchange. The token is mainly composed of header, payload, signature. These three parts are separated by dots(.). JWT defines the structure of information we are sending from one party to the another, and it comes in two forms – Serialized, Deserialized. The Serialized approach is mainly used to transfer the data through the network with each request and response. While the deserialized approach is used to read and write data to the web token.
Mongoose:
MongoDB is a database that allows you to store documents with a dynamic structure. These documents are saved inside a collection.
Mongoose is a JavaScript library that allows you to define schemas with strongly typed data. Once a schema is defined, Mongoose lets you create a Model based on a specific schema. A Mongoose Model is then mapped to a MongoDB Document via the Model's schema definition.
Once you have defined your schemas and models, Mongoose contains many different functions that allow you to validate, save, delete, and query your data using common MongoDB functions. I'll talk about this more with the concrete code examples to follow.
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