Crate rydantic 

Unified JSON models for Rust.

use rydantic::{Model, SchemaMode};

#[derive(Debug, Model)]
struct User {
    #[model(trim, min_length = 3)]
    name: String,
    #[model(ge = 18, le = 120)]
    age: u8,
}

let user = User::parse_json(r#"{"name":" Alice ","age":25}"#)?;
assert_eq!(user.name, "Alice");
assert!(User::json_schema(SchemaMode::Output).is_object());

Re-exports

pub use sql::SqlError;

pub use sql::SqlModel;

pub use capnp_support::CapnpSchema;

pub use capnp_support::CapnpEnum;

pub use capnp_support::CapnpModel;

pub use schema::LocalRule;

pub use schema::SchemaContext;

pub use schema::SchemaMode;

pub use schema::SchemaReport;

pub use sqlx;

pub use capnp;

pub use chrono;

pub use rust_decimal;

Modules

axum

Axum extractors that preserve structured model errors and raw JSON input.

capnp_support

Native Cap’n Proto integration with automatic protocols and existing schemas. Model data maps directly to official readers and builders.

rules

schema

sql

SQLModel-style SQLite, PostgreSQL and MySQL persistence backed by SQLx and Tokio.

stream

Incremental JSON sequences, NDJSON and array visitors. Readers are synchronous.

Macros

json

Construct a serde_json::Value from a JSON literal.

Structs

AsyncValidated

Immutable result of successful synchronous and asynchronous validation.

BorrowValidated

Context

Shared error collector used by generated code and custom JsonType implementations.

DynamicModel

Runtime JSON Schema validation. Compile once and reuse the validator.

RawValue

Reference to a range of bytes encompassing a single valid JSON value in the input data.

SchemaError

Validated

Read-only access to a successfully checked model. No DerefMut or unchecked constructor. Interior-mutability types can weaken this guarantee; their JsonType implementation must document that behavior.

ValidationError

Machine-readable validation failure. Raw input is deliberately not retained.

ValidationErrors

Enums

Input

A JSON subtree that can retain references into the original input buffer.

PathSegment

A location in a nested input. Object keys and array indices remain distinct.

Stage

TypeKind

Value

Represents any valid JSON value.

Traits

AsyncCheck

Asynchronous checks, executed after synchronous parsing and validation succeed. Implementations must leave the supplied context usable if the future is cancelled.

BorrowModel

Parsing API for a model containing references or Cow values.

BorrowType

Lifetime-aware counterpart of JsonType. Borrowing models use this extension point.

ExtraFields

Storage for #[model(extra)]. Keys are merged into the surrounding object.

JsonType

Extension point for JSON-compatible Rust types.

LengthType

Model

High-level model API generated by #[derive(Model)].

NumericType

ObjectType

Object shape information used by flattened fields, independent of ownership.

StringType

Marker traits make invalid attribute/type combinations fail during compilation.

Type Aliases

BoxFuture

Attribute Macros

capnp_models

Derive a complete Cap’n Proto protocol and its bindings from an inline model module.

Derive Macros

Model

SqlModel

Derive SQL schema metadata, SQLx row decoding and validated CRUD operations.