Implementing Soft Delete In Mongoose

Implementing Soft Delete in Mongoose

In this post, we will give you information about Implementing Soft Delete in Mongoose. Here we will give you detail about Implementing Soft Delete in Mongoose And how to use it also give you a demo for it if it is necessary.

Soft delete means setting an isDeleted flag on the document to mark a document as deleted, rather than actually deleting the document. This means you can keep the document for future analysis.

const mongoose = require('mongoose');

const testSchema = new mongoose.Schema({
  name: String,
  isDeleted: Boolean
});

Using Query Middleware for Implementing Soft Delete in Mongoose

You can use middleware to filter out documents that have isDeleted: true, so Mongoose only returns documents that don’t have isDeleted: true.

const mongoose = require('mongoose');

const testSchema = new mongoose.Schema({
  name: String,
  isDeleted: { type: Boolean, defaults: false }
});

testSchema.pre('find', function() {
  this.where({ isDeleted: false });
});

testSchema.pre('findOne', function() {
  this.where({ isDeleted: false });
});

const Test = mongoose.model('Test', testSchema);

async function run() {
  await mongoose.connect('mongodb://localhost:27017');
  await mongoose.connection.dropDatabase();

  await Test.create({
    name: 'Test'
  });
  await Test.create({
    name: 'HiddenTest',
    isDeleted: true
  });

  // Only returns 'Test' document, not 'HiddenTest'
  const docs = await Test.find();
}

run();

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A mongoose is a small, carnivorous mammal that is found in Africa, Asia, and southern Europe. They are known for their ability to kill venomous snakes, and they have been used for centuries to control snake populations. Mongooses are also popular pets, but they can be difficult to care for and are not recommended for everyone.

Here are some of the pros and cons of owning a mongoose:

Pros:

Mongooses are intelligent and can be trained to do tricks.
They are relatively small and easy to care for.
They can be effective at controlling snake populations.

Cons:

Mongooses can be aggressive and unpredictable.
They are not legal to own in some places.
They can carry diseases, such as rabies.

If you are considering getting a mongoose as a pet, it is important to do your research and make sure that you are prepared to provide the proper care. Mongooses are not for everyone, but they can make great companions for the right people(Implementing Soft Delete in Mongoose).

Here are some additional facts about mongooses:

They are about the size of a cat, with long bodies and tails.
They have sharp claws and teeth, which they use to catch and kill prey.
They are active during the day and night.
They eat a variety of foods, including snakes, rodents, insects, and fruit.
Mongooses live in a variety of habitats, including forests, grasslands, and deserts.
They are solitary animals, but they will sometimes gather in groups to hunt.
Mongooses are monogamous, and they mate for life.
Females give birth to litters of 2-4 young.
Mongooses reach sexual maturity at about 6 months old.
They have a lifespan of about 10 years.