update method in adonisjs controller

Question

How to update data in the database without creating a new one?

async update ({ params, request, response }) {
    const product = await Product.find(params.id)

    product.name = request.input('name')
    product.descr = request.input('descr')
    product.qtd = request.input('qtd')
    product.sub_descr = request.input('sub_descr')
    product.price = request.input('price')

    product.save()

    return response.redirect('/')
  }

This code is creating a new instance, the product.update() method returns me an error

Answer 1

Adonisjs lucid supports automatic inserts & updates - meaning it intelligently updates or inserts a record based on the input.

According to the docs:

The save method persists the instance to the database, intelligently determining whether to create a new row or update the existing row.

However if you want to perform an update/bulk update you can always build a query as mentioned here .

But the problem you might face it

Bulk updates don't execute model hooks.

Example for Insert/Update:

const User = use('App/Models/User')

const user = new User()
user.username = 'virk'
user.email = 'foo@bar.com'

// Insert
await user.save()

user.age = 22

// Update
await user.save()

Example for Bulk Update:

const User = use('App/Models/User')

await User
  .query()
  .where('username', 'virk')
  .update({ role: 'admin' })