### Home Classes Methods

### In Files

- lib/active_record/attribute_methods/primary_key.rb

### Methods

- #dangerous_attribute_method?
- #define_method_attribute
- #primary_key
- #primary_key=
- #quoted_primary_key

### Files

- README.rdoc

### Class/Module Index

Quicksearch

- ActiveRecord
- ActiveRecord::ActiveRecordError
- ActiveRecord::AdapterNotFound
- ActiveRecord::AdapterNotSpecified
- ActiveRecord::Aggregations
- ActiveRecord::Aggregations::ClassMethods
- ActiveRecord::AssociationTypeMismatch
- ActiveRecord::Associations
- ActiveRecord::Associations::ClassMethods
- ActiveRecord::AttributeAssignment
- ActiveRecord::AttributeAssignment::ClassMethods
- ActiveRecord::AttributeAssignmentError
- ActiveRecord::AttributeMethods
- ActiveRecord::AttributeMethods::BeforeTypeCast
- ActiveRecord::AttributeMethods::ClassMethods
- ActiveRecord::AttributeMethods::DeprecatedUnderscoreRead
- ActiveRecord::AttributeMethods::DeprecatedUnderscoreRead::ClassMethods
- ActiveRecord::AttributeMethods::Dirty
- ActiveRecord::AttributeMethods::PrimaryKey
- ActiveRecord::AttributeMethods::PrimaryKey::ClassMethods
- ActiveRecord::AttributeMethods::Query
- ActiveRecord::AttributeMethods::Read
- ActiveRecord::AttributeMethods::Read::ClassMethods
- ActiveRecord::AttributeMethods::Serialization
- ActiveRecord::AttributeMethods::Serialization::Attribute
- ActiveRecord::AttributeMethods::Serialization::ClassMethods
- ActiveRecord::AttributeMethods::TimeZoneConversion
- ActiveRecord::AttributeMethods::TimeZoneConversion::ClassMethods
- ActiveRecord::AttributeMethods::Write
- ActiveRecord::AttributeMethods::Write::ClassMethods
- ActiveRecord::AutosaveAssociation
- ActiveRecord::AutosaveAssociation::ClassMethods
- ActiveRecord::Base
- ActiveRecord::Batches
- ActiveRecord::Calculations
- ActiveRecord::Callbacks
- ActiveRecord::Coders
- ActiveRecord::ConfigurationError
- ActiveRecord::ConnectionAdapters
- ActiveRecord::ConnectionAdapters::AbstractAdapter
- ActiveRecord::ConnectionAdapters::AbstractMysqlAdapter
- ActiveRecord::ConnectionAdapters::ConnectionHandler
- ActiveRecord::ConnectionAdapters::ConnectionManagement
- ActiveRecord::ConnectionAdapters::ConnectionPool
- ActiveRecord::ConnectionAdapters::DatabaseLimits
- ActiveRecord::ConnectionAdapters::DatabaseStatements
- ActiveRecord::ConnectionAdapters::Mysql2Adapter
- ActiveRecord::ConnectionAdapters::MysqlAdapter
- ActiveRecord::ConnectionAdapters::MysqlAdapter::StatementPool
- ActiveRecord::ConnectionAdapters::PostgreSQLAdapter
- ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::StatementPool
- ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::TableDefinition
- ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::Utils
- ActiveRecord::ConnectionAdapters::PostgreSQLColumn
- ActiveRecord::ConnectionAdapters::QueryCache
- ActiveRecord::ConnectionAdapters::Quoting
- ActiveRecord::ConnectionAdapters::SQLiteAdapter
- ActiveRecord::ConnectionAdapters::SQLiteAdapter::ExplainPrettyPrinter
- ActiveRecord::ConnectionAdapters::SQLiteAdapter::StatementPool
- ActiveRecord::ConnectionAdapters::SQLiteAdapter::Version
- ActiveRecord::ConnectionAdapters::SchemaCache
- ActiveRecord::ConnectionAdapters::SchemaStatements
- ActiveRecord::ConnectionAdapters::StatementPool
- ActiveRecord::ConnectionAdapters::Table
- ActiveRecord::ConnectionAdapters::TableDefinition
- ActiveRecord::ConnectionNotEstablished
- ActiveRecord::ConnectionTimeoutError
- ActiveRecord::CounterCache
- ActiveRecord::DangerousAttributeError
- ActiveRecord::Delegation
- ActiveRecord::DynamicFinderMatch
- ActiveRecord::DynamicMatchers
- ActiveRecord::DynamicScopeMatch
- ActiveRecord::Explain
- ActiveRecord::FinderMethods
- ActiveRecord::Fixtures
- ActiveRecord::Fixtures::File
- ActiveRecord::Generators
- ActiveRecord::Generators::Migration
- ActiveRecord::Generators::MigrationGenerator
- ActiveRecord::Generators::ModelGenerator
- ActiveRecord::Generators::ObserverGenerator
- ActiveRecord::Generators::SessionMigrationGenerator
- ActiveRecord::IdentityMap
- ActiveRecord::IdentityMap::Middleware
- ActiveRecord::Inheritance
- ActiveRecord::Inheritance::ClassMethods
- ActiveRecord::Integration
- ActiveRecord::InvalidForeignKey
- ActiveRecord::IrreversibleMigration
- ActiveRecord::Locking
- ActiveRecord::Locking::Optimistic
- ActiveRecord::Locking::Optimistic::ClassMethods
- ActiveRecord::Locking::Pessimistic
- ActiveRecord::LogSubscriber
- ActiveRecord::Migration
- ActiveRecord::Migration::CommandRecorder
- ActiveRecord::MigrationProxy
- ActiveRecord::ModelSchema
- ActiveRecord::ModelSchema::ClassMethods
- ActiveRecord::MultiparameterAssignmentErrors
- ActiveRecord::NestedAttributes
- ActiveRecord::NestedAttributes::ClassMethods
- ActiveRecord::NestedAttributes::TooManyRecords
- ActiveRecord::Observer
- ActiveRecord::Persistence
- ActiveRecord::Persistence::ClassMethods
- ActiveRecord::PreparedStatementInvalid
- ActiveRecord::QueryCache
- ActiveRecord::QueryCache::ClassMethods
- ActiveRecord::QueryMethods
- ActiveRecord::Querying
- ActiveRecord::Railtie
- ActiveRecord::Railties
- ActiveRecord::Railties::ControllerRuntime
- ActiveRecord::Railties::ControllerRuntime::ClassMethods
- ActiveRecord::ReadOnlyRecord
- ActiveRecord::ReadonlyAttributes
- ActiveRecord::ReadonlyAttributes::ClassMethods
- ActiveRecord::RecordInvalid
- ActiveRecord::RecordNotFound
- ActiveRecord::RecordNotSaved
- ActiveRecord::RecordNotUnique
- ActiveRecord::Reflection
- ActiveRecord::Reflection::ClassMethods
- ActiveRecord::Reflection::MacroReflection
- ActiveRecord::Result
- ActiveRecord::Rollback
- ActiveRecord::Sanitization
- ActiveRecord::Sanitization::ClassMethods
- ActiveRecord::Schema
- ActiveRecord::Scoping
- ActiveRecord::Scoping::ClassMethods
- ActiveRecord::Scoping::Default
- ActiveRecord::Scoping::Default::ClassMethods
- ActiveRecord::Scoping::Named
- ActiveRecord::Scoping::Named::ClassMethods
- ActiveRecord::Serialization
- ActiveRecord::SerializationTypeMismatch
- ActiveRecord::SessionStore
- ActiveRecord::SessionStore::Session
- ActiveRecord::SessionStore::SqlBypass
- ActiveRecord::SpawnMethods
- ActiveRecord::StaleObjectError
- ActiveRecord::StatementInvalid
- ActiveRecord::Store
- ActiveRecord::Store::ClassMethods
- ActiveRecord::TestFixtures
- ActiveRecord::TestFixtures::ClassMethods
- ActiveRecord::ThrowResult
- ActiveRecord::Timestamp
- ActiveRecord::Transactions
- ActiveRecord::Transactions::ClassMethods
- ActiveRecord::Translation
- ActiveRecord::UnknownAttributeError
- ActiveRecord::UnknownPrimaryKey
- ActiveRecord::Validations
- ActiveRecord::Validations::AssociatedValidator
- ActiveRecord::Validations::ClassMethods
- ActiveRecord::Validations::UniquenessValidator
- ActiveRecord::WrappedDatabaseException
- Mysql
- Mysql::Result
- Mysql::Stmt
- Mysql::Time
- ArJdbcMySQL
- ArJdbcMySQL::Error

No matching classes.

# ActiveRecord::AttributeMethods::PrimaryKey::ClassMethods

### Public Instance Methods

dangerous_attribute_method?(method_name) click to toggle source

    # File lib/active_record/attribute_methods/primary_key.rb, line 42
    def dangerous_attribute_method?(method_name)
      super && !['id', 'id=', 'id?'].include?(method_name)
    end

define_method_attribute(attr_name) click to toggle source

    # File lib/active_record/attribute_methods/primary_key.rb, line 28
    def define_method_attribute(attr_name)
      super

      if attr_name == primary_key && attr_name != 'id'
        generated_attribute_methods.send(:alias_method, :id, primary_key)
        generated_external_attribute_methods.module_eval               def id(v, attributes, attributes_cache, attr_name)                attr_name = '#{primary_key}'                send(attr_name, attributes[attr_name], attributes, attributes_cache, attr_name)              end, __FILE__, __LINE__
      end
    end

primary_key() click to toggle source

Defines the primary key field -- can be overridden in subclasses. Overwriting will negate any effect of the primary_key_prefix_type setting, though.

    # File lib/active_record/attribute_methods/primary_key.rb, line 48
    def primary_key
      @primary_key = reset_primary_key unless defined? @primary_key
      @primary_key
    end

primary_key=(value) click to toggle source

Sets the name of the primary key column.

    class Project < ActiveRecord::Base
      self.primary_key = "sysid"
    end

You can also define the primary_key method yourself:

    class Project < ActiveRecord::Base
      def self.primary_key
        "foo_" + super
      end
    end
    Project.primary_key # => "foo_id"

    # File lib/active_record/attribute_methods/primary_key.rb, line 101
    def primary_key=(value)
      @original_primary_key = @primary_key if defined?(@primary_key)
      @primary_key          = value && value.to_s
      @quoted_primary_key   = nil
    end

quoted_primary_key() click to toggle source

Returns a quoted version of the primary key name, used to construct SQL statements.

    # File lib/active_record/attribute_methods/primary_key.rb, line 54
    def quoted_primary_key
      @quoted_primary_key ||= connection.quote_column_name(primary_key)
    end

[Validate]

Generated with the Darkfish Rdoc Generator 2.