• active_support/deprecation
• active_record/associations/errors

• 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::ConnectionNotDefined
• 类 ActiveRecord::ConnectionNotEstablished
• 类 ActiveRecord::ConnectionTimeoutError
• 类 ActiveRecord::DangerousAttributeError
• 类 ActiveRecord::DatabaseAlreadyExists
• 类 ActiveRecord::DatabaseConnectionError
• 类 ActiveRecord::DatabaseVersionError
• 类 ActiveRecord::Deadlocked
• 类 ActiveRecord::ExclusiveConnectionTimeoutError
• 类 ActiveRecord::InvalidForeignKey
• 类 ActiveRecord::IrreversibleOrderError
• 类 ActiveRecord::LockWaitTimeout
• 类 ActiveRecord::MismatchedForeignKey
• 类 ActiveRecord::MultiparameterAssignmentErrors
• 类 ActiveRecord::NoDatabaseError
• 类 ActiveRecord::NotNullViolation
• 类 ActiveRecord::PreparedStatementCacheExpired
• 类 ActiveRecord::PreparedStatementInvalid
• 类 ActiveRecord::QueryAborted
• 类 ActiveRecord::QueryCanceled
• 类 ActiveRecord::RangeError
• 类 ActiveRecord::ReadOnlyError
• 类 ActiveRecord::ReadOnlyRecord
• 类 ActiveRecord::RecordNotDestroyed
• 类 ActiveRecord::RecordNotFound
• 类 ActiveRecord::RecordNotSaved
• 类 ActiveRecord::RecordNotUnique
• 类 ActiveRecord::Rollback
• 类 ActiveRecord::SQLWarning
• 类 ActiveRecord::SerializationFailure
• 类 ActiveRecord::SerializationTypeMismatch
• 类 ActiveRecord::SoleRecordExceeded
• 类 ActiveRecord::StaleObjectError
• 类 ActiveRecord::StatementInvalid
• 类 ActiveRecord::StatementTimeout
• 类 ActiveRecord::StrictLoadingViolationError
• 类 ActiveRecord::SubclassNotFound
• 类 ActiveRecord::TableNotSpecified
• 类 ActiveRecord::TransactionIsolationError
• 类 ActiveRecord::TransactionRollbackError
• 类 ActiveRecord::UnknownAttributeReference
• 类 ActiveRecord::UnknownPrimaryKey
• 类 ActiveRecord::UnmodifiableRelation
• 类 ActiveRecord::ValueTooLong
• 类 ActiveRecord::WrappedDatabaseException