require 'soft_deletion'

class User < ActiveRecord::Base
  has_soft_deletion default_scope: true

  before_soft_delete :validate_deletability # soft_delete stops if this returns false
  after_soft_delete :send_deletion_emails

  has_many :products
end

# soft delete them including all soft-deletable dependencies that are marked as :destroy, :delete_all, :nullify
user = User.first
user.products.count == 10
user.soft_delete!(validate: false)
user.deleted? # true

# use special with_deleted scope to find them ...
user.reload # ActiveRecord::RecordNotFound
User.with_deleted do
  user.reload # there it is ...
  user.products.count == 0
end

# Do NOT use on assocations: Account.first.users.with_deleted {

# soft undelete them all
user.soft_undelete!
user.products.count == 10

# soft delete many
User.soft_delete_all!(1,2,3,4)

class AddDeletedAtToUsers < ActiveRecord::Migration[6.0]
  def change
    add_column :users, :deleted_at, :datetime
    add_index :users, :deleted_at
  end
end