class ImmutableRelation

Ruby on Rails 4.2.9

Since v4.0.13 Last seen in v7.1.6

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

Compare with:

Raised when a relation cannot be mutated because it’s already loaded.

class Task < ActiveRecord::Base
end

relation = Task.all
relation.loaded? # => true

# Methods which try to mutate a loaded relation fail.
relation.where!(title: 'TODO')  # => ActiveRecord::ImmutableRelation
relation.limit!(5)              # => ActiveRecord::ImmutableRelation

Inherits from

ActiveRecord::ActiveRecordError