rust-ef-macros 1.5.1

Procedural macros for Rust Entity Framework
Documentation

lref-macros

Crates.io License: MIT

Procedural macros for Rust Entity Framework (lref).

Provides:

  • #[derive(EntityType)] �?generates EntityType, FromRow, GetKeyValues, and EntitySnapshot trait implementations
  • column!() �?resolves entity fields to database column names at compile time

Usage

use lref::prelude::*;
use lref::column;

#[derive(Debug, Clone, EntityType)]
#[table("blogs")]
pub struct Blog {
    #[primary_key]
    #[auto_increment]
    pub blog_id: i32,

    #[required]
    #[max_length(200)]
    pub url: String,

    pub rating: i32,
}

// Type-safe column reference
let col = column!(Blog::url);  // expands to Blog::COLUMN_URL �?"url"

Generated Code

For each struct, #[derive(EntityType)] generates:

  1. EntityType impl �?returns EntityTypeMeta with table name, columns, keys, navigations
  2. FromRow impl �?materializes entities from &[String] database row data
  3. GetKeyValues impl �?returns primary key values for SaveChanges WHERE clauses
  4. EntitySnapshot impl �?returns all scalar property values for INSERT/UPDATE
  5. COLUMN_* constants �?type-safe column name references (used by column!())

Supported Field Attributes

Attribute Description Example
#[primary_key] Primary key column pub id: i32
#[auto_increment] Auto-increment / identity pub id: i32
#[required] NOT NULL constraint pub name: String
#[max_length(200)] Max string length pub url: String
#[column("db_col")] Different DB column name pub rust_name: String
#[foreign_key(User)] Foreign key reference pub user_id: i32
#[navigation] Navigation property pub blog: BelongsTo<Blog>
#[not_mapped] Exclude from mapping pub temp: String
#[index] Create database index pub email: String
#[unique] Create unique index pub username: String
#[concurrency_check] Optimistic concurrency token pub version: i32

License

MIT �?see LICENSE