Features

• Identity traits (plus helper types like ValidIdentity and IdentityOf)
• Repository traits like Add, Get, List
• No need to use unimplemented!() or blanket implementations- construct your own repository based on set of traits
• No heavy macro magic
• Transactional repository traits based on HCons with rollback feature
• Transactional wrapper for repository, which can be used both as plain repository inheriting behavior of inner repository, or transactional repository
• Perform operations on many repositories in one transaction

Goals

• Provide flexible and abstract generic-based repository traits
• Easy transaction implementation
• Non-essential features are optional
• No unsafe and panics
• No runtime errors caused by library
• No enforced error types

Non-goals

Roadmap

• transactional traits and RepositoryWrapper
• RepositoryWrapper rollback support
• seamless transactional and non-transactional interop for RepositoryWrapper
• IdentityBy-like trait for marker structs
• pointer-based ValidIdentity
• pass previous operation result as next operation argument in transactions
• sync/async operations with optional features
• optional serde support
• sync transactions support
• HCons wrapper for more convenient output extraction
• TransactionRunner settings and different mappers
• transaction log

Notes

Many generic bounds were made out of heuristics, so feel free to propose reasonable bound changes

Project is in early stage, expect breaking API changes