Module model 

Available on crate features model-mysql or model-postgres or model-sqlite only.

Model — Async Database Access Layer

An async JPA/Hibernate-style ORM backed by sqlx. Provides:

• #[derive(Model)] proc-macro for struct-to-table mapping
• Repository<T, i64> trait for zero-boilerplate async CRUD
• QueryBuilder<T> for fluent async filtering
• DbPool for connection management (wraps sqlx::Pool)
• Async migration runner
• Relationship helpers (HasMany, HasOne, BelongsTo)

Enable one or more backend features — model-sqlite, model-postgres, and model-mysql are not mutually exclusive, so a single binary can hold pools to more than one backend at once (see Backend):

# SQLite
rust-web-server = { features = ["model-sqlite"] }
# PostgreSQL
rust-web-server = { features = ["model-postgres"] }
# MySQL
rust-web-server = { features = ["model-mysql"] }
# Or more than one at once
rust-web-server = { features = ["model-sqlite", "model-postgres"] }

Re-exports

pub use backend::Backend;

pub use connection::DbConfig;

pub use connection::DbSslMode;

pub use connection::DbTls;

pub use migration::MigrationStatus;

pub use pool::DbPool;

pub use pool::DbTransaction;

pub use query::Order;

pub use query::QueryBuilder;

pub use relation::BelongsTo;

pub use relation::HasMany;

pub use relation::HasOne;

pub use repository::ModelRepository;

pub use repository::Repository;

pub use crate::pagination::CursorPage;

pub use crate::pagination::Page;

Modules

backend

Backend — which compiled-in database driver a super::DbPool uses.

connection

Database connection configuration.

migration

Async migration runner.

pool

Async connection pool — DbPool and DbTransaction.

query

Async fluent QueryBuilder<T> for constructing SQL queries.

relation

Async relationship helpers: HasMany, HasOne, BelongsTo.

repository

Async Repository trait and ModelRepository implementation.

Structs

DbError

Error type returned by all model/DB operations.

ModelInfo

What a Model type maps to, read from its trait implementation: the type, its table, its columns and primary key (18.28.0). Rust can’t list the #[derive(Model)] types of a program at run time, so whatever reports models (the dev MCP server’s models tool, DevTools::model::<T>()) is given each type once.

ModelRow

Backend-independent database row.

Enums

Value

Backend-independent SQL value representation.

Traits

FromColumn

Convert a Value into a Rust type.

Model

Trait generated by #[derive(Model)]. Maps a Rust struct to a database table.

ToColumn

Convert a Rust value into a Value.