instance method `readonly!`

Ruby on Rails 8.0.4

Since v4.0.13

Available in: v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

readonly!()

Prevents records from being written to the database:

customer = Customer.new
customer.readonly!
customer.save # raises ActiveRecord::ReadOnlyRecord

customer = Customer.first
customer.readonly!
customer.update(name: 'New Name') # raises ActiveRecord::ReadOnlyRecord

Read-only records cannot be deleted from the database either:

customer = Customer.first
customer.readonly!
customer.destroy # raises ActiveRecord::ReadOnlyRecord

Please, note that the objects themselves are still mutable in memory:

customer = Customer.new
customer.readonly!
customer.name = 'New Name' # OK

but you won’t be able to persist the changes.

Source

# File activerecord/lib/active_record/core.rb, line 766
    def readonly!
      @readonly = true
    end

Defined in activerecord/lib/active_record/core.rb line 766 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveRecord::Core

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