Mongoose--------ORM Data Manipulation framework

Data Relationship mapping: ORM

O:object

R:relation

M:mapping

The operation of the database is the equivalent of manipulating the database by encapsulating it into the object and manipulating the object.

Installation:

NPM Install Mongoose

Usage examples:

Const Mongoose=require (' Mongoose ')

1. Connect to the database
Mongoose.connect (' mongodb://127.0.0.1:27017/edu ')
2. Design the model structure
Const Catschema=mongoose. Schema ({
Name:string,
Age:number
})
3. Create a model based on the model structure,
Const Cat=mongoose.model (' Cat ', Catschema)

4. Manipulate the model to manipulate the database
Const Kitty=new Cat ({
Name: "Kitty",
Age:1
})
5. Call the Save method to save the model data to the database
Kitty.save (err=>{
if (err) {
Throw err
}
Console.log (' Save Success ')
})

Mongoose--------ORM Data Manipulation framework