One post tagged with "dsl"

The Rust runtime now supports typed graph mutations and a fluent query DSL.

Typed Entity Graph Saves​

let mut graph = EntityGraph::new();
graph.add(User::new().name("Alice"));
graph.add(Order::new().user_id("Alice.id"));

db.save_graph(&graph).await?;

The runtime validates foreign keys, plans insertion order, and executes within a transaction.

SQL Id Space Generator​

let id_gen = SqlIdSpace::new("user_id_seq", 1000);
let batch = id_gen.next_batch(10).await?;

Reserves id ranges in bulk. Reduces database round-trips during bulk inserts.

Decimal for Aggregates​

let total: Decimal = db.query(Order::total())
    .filter(Order::status().eq("paid"))
    .sum()
    .await?;

rust_decimal replaces f64 for all aggregate results. Eliminates floating-point drift in financial calculations.

Query DSL​

let users = db.query(User::class())
    .filter(User::age().gte(18))
    .order_by(User::created_at().desc())
    .limit(20)
    .list()
    .await?;

Methods chain naturally. The macro expands field references into type-safe column identifiers at compile time.

Checker Events​

Graph mutations emit checker events:

• Pre-save validation
• Post-save side effects
• Rollback on failure

This hooks into the transactional planner for complex business rules.