sqly

sqly is a lightweight macro system on top of sqlx, inspired by ormx.

It works by generating common SQL queries and associated structs at compile time, letting the generated queries be checked and executed by sqlx.

This crate differs from ormx mainly by the added functionality of generating SQL SELECT queries with support for nested objects through SQL JOIN clauses. Additionally, sqly::query! macros can be used to further expand generated queries while still providing compile-time verification.

This functionality is still under development (see Roadmap).

Cargo.toml

[dependencies.sqly]
version = "0.3.0"
features = ["postgres"]

[dependencies.sqlx]
version = "0.8.0"
default-features = false
features = ["postgres", "macros"]

[profile.dev.package.sqlx-macros]
opt-level = 3

[profile.dev.package.sqly-macros]
opt-level = 3

Features

unchecked — disable compile-time checking
postgres — generate queries for PostgreSQL
mariadb — generate queries for MariaDB (not supported)
sqlite — generate queries for SQLite (not supported)
mysql — generate queries for MySQL (not supported)

Currently only postgres is supported.

Usage

Roadmap

Major

• Basic DELETE queries
• Basic INSERT queries
• Basic UPDATE queries
• Basic SELECT queries
  • Storing information across separate #[derive] invocations
  • Optional outer macro pattern for better compiler support
• #[sqly(foreign)]
  • SQL INNER JOIN
  • SQL LEFT JOIN
  • Custom SQL joins
  • Unique table aliases
• sqly::query! macros to extend generated queries

Minor

• Table::Flat type for convenience
  • #[derive(Flat)] and #[sqly(flat)] for flexibility
• #[sqly(infer)] for custom sqlx types
• #[sqly(value)] for custom parameter binding
• #[sqly(select)] for custom SQL select expressions
• #[sqly(filter)] for custom SQL filter expressions
• #[sqly(optional)] for optional update and insert fields
• #[sqly(returning)] for SQL RETURNING clause
• #[sqly(distinct)] for SQL DISTINCT clause
• #[sqly(from, try_from, default)] for table
• Implementation of bulk operations for &[T]

Draft

• #[sqly(group)] for SQL GROUP BY clause
• Decoding database rows unchecked or by index
• Custom macro attributes in generated structs
• Support for generic structs
• ... ?

License