• 模块 ActiveRecord
• 模块 ActiveRecord::Tasks
• 类 ActiveRecord::ActiveRecordError
• 类 ActiveRecord::AdapterError
• 类 ActiveRecord::AdapterNotFound
• 类 ActiveRecord::AdapterNotSpecified
• 类 ActiveRecord::AdapterTimeout
• 类 ActiveRecord::AssociationTypeMismatch
• 类 ActiveRecord::AsynchronousQueryInsideTransactionError
• 类 ActiveRecord::AttributeAssignmentError
• 类 ActiveRecord::ConfigurationError
• 类 ActiveRecord::ConnectionFailed
• 类 ActiveRecord::ConnectionNotEstablished
• 类 ActiveRecord::ConnectionTimeoutError
• 类 ActiveRecord::DangerousAttributeError
• 类 ActiveRecord::DatabaseAlreadyExists
• 类 ActiveRecord::DatabaseConnectionError
• CLASS ActiveRecord::Deadlocked
• CLASS ActiveRecord::ExclusiveConnectionTimeoutError
• CLASS ActiveRecord::ImmutableRelation
• CLASS ActiveRecord::InvalidForeignKey
• CLASS ActiveRecord::IrreversibleOrderError
• CLASS ActiveRecord::LockWaitTimeout
• CLASS ActiveRecord::MismatchedForeignKey
• CLASS ActiveRecord::MultiparameterAssignmentErrors
• CLASS ActiveRecord::NoDatabaseError
• CLASS ActiveRecord::NotNullViolation
• CLASS ActiveRecord::PreparedStatementCacheExpired
• CLASS ActiveRecord::PreparedStatementInvalid
• CLASS ActiveRecord::QueryAborted
• CLASS ActiveRecord::QueryCanceled
• CLASS ActiveRecord::RangeError
• CLASS ActiveRecord::ReadOnlyError
• CLASS ActiveRecord::ReadOnlyRecord
• CLASS ActiveRecord::RecordNotDestroyed
• CLASS ActiveRecord::RecordNotFound
• CLASS ActiveRecord::RecordNotSaved
• CLASS ActiveRecord::RecordNotUnique
• CLASS ActiveRecord::Rollback
• CLASS ActiveRecord::SQLWarning
• CLASS ActiveRecord::SerializationFailure
• CLASS ActiveRecord::SerializationTypeMismatch
• CLASS ActiveRecord::SoleRecordExceeded
• CLASS ActiveRecord::StaleObjectError
• CLASS ActiveRecord::StatementInvalid
• CLASS ActiveRecord::StatementTimeout
• CLASS ActiveRecord::StrictLoadingViolationError
• CLASS ActiveRecord::SubclassNotFound
• CLASS ActiveRecord::TableNotSpecified
• CLASS ActiveRecord::TransactionIsolationError
• CLASS ActiveRecord::TransactionRollbackError
• CLASS ActiveRecord::UnknownAttributeReference
• CLASS ActiveRecord::UnknownPrimaryKey
• CLASS ActiveRecord::ValueTooLong
• CLASS ActiveRecord::WrappedDatabaseException