Module: ActiveRecord::Encryption::ExtendedDeterministicQueries

Defined in:
activerecord/lib/active_record/encryption/extended_deterministic_queries.rb

Overview

Automatically expand encrypted arguments to support querying both encrypted and unencrypted data

Active Record Encryption supports querying the db using deterministic attributes. For example:

Contact.find_by(email_address: "[email protected]")

The value “[email protected]” will get encrypted automatically to perform the query. But there is a problem while the data is being encrypted. This won’t work. During that time, you need these queries to be:

Contact.find_by(email_address: [ "[email protected]", "<encrypted [email protected]>" ])

This patches ActiveRecord to support this automatically. It addresses both:

  • ActiveRecord::Base - Used in Contact.find_by_email_address(...)

  • ActiveRecord::Relation - Used in Contact.internal.find_by_email_address(...)

This module is included if ‘config.active_record.encryption.extend_queries` is `true`.

Defined Under Namespace

Modules: CoreQueries, EncryptedQuery, ExtendedEncryptableType, InWithAdditionalValues, RelationQueries Classes: AdditionalValue

Class Method Summary collapse

Class Method Details

.install_support ⇒ Object 



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# File 'activerecord/lib/active_record/encryption/extended_deterministic_queries.rb', line 24

def self.install_support
  # ActiveRecord::Base relies on ActiveRecord::Relation (ActiveRecord::QueryMethods) but it does
  # some prepared statements caching. That's why we need to intercept +ActiveRecord::Base+ as soon
  # as it's invoked (so that the proper prepared statement is cached).
  ActiveRecord::Relation.prepend(RelationQueries)
  ActiveRecord::Base.include(CoreQueries)
  ActiveRecord::Encryption::EncryptedAttributeType.prepend(ExtendedEncryptableType)
  Arel::Nodes::HomogeneousIn.prepend(InWithAdditionalValues)
end