Schemas And Models

Question 1

What is a model?

Answer 1

It is the blueprint for a document to be stored in the database, similar to a class.

Question 2

What is a schema?

Answer 2

It is the rules that the model uses to create its blueprint for creating documents.

Question 3

How do you create a schema?

Answer 3

const schema = new mongoose.Schema({attr: {type: String/Number/Date, default: val, required: [true, ‘error message’]}, attr: DataType});

Question 4

What are some other important schema type options?

Answer 4

unique: true/false, trim: true/false

Question 5

Which JavaScript built-in function gives the current date and time in milliseconds?

Answer 5

Date.now()

Question 6

How do you set an attribute’s data as an array of data elements in a schema?

Answer 6

attr: [dataType]

Question 7

How do you create a model?

Answer 7

const ModelName = mongoose.model(‘ModelName’, Schema)

Question 8

When you create a new model, what happens in the background?

Answer 8

A new collection is created in the database named after the model.