Add Triple — Weave Docs

add_triple(subject, predicate, object).await serializes a Triple, appends it to the supplied Strand, then indexes the sequence by subject, predicate and object. It returns (), not a triple ID. Duplicate triples are allowed. Persistence follows the Strand backend; no automatic replay rebuilds indexed queries on a new Gnosis/SDK instance. Check-then-add is not a uniqueness transaction, and a Lens boolean does not make it one.

This example is checked against source signatures; it was not compiled or run during this documentation pass.

use std::sync::Arc;
use tokio::sync::RwLock;
use strand::{Strand, StrandConfig};
use gnosis::Gnosis;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let dir = tempfile::tempdir()?;
    let cfg = StrandConfig::new().with_storage(dir.path());
    let strand = Arc::new(RwLock::new(Strand::new(cfg).await?));

    let gnosis = Gnosis::new(strand);

    gnosis.add_triple("alice", "trusts",      "bob").await?;
    gnosis.add_triple("alice", "trusts",      "carol").await?;
    gnosis.add_triple("bob",   "has_role",    "admin").await?;
    gnosis.add_triple("carol", "has_role",    "viewer").await?;

    println!("4 facts persisted to the Strand and indexed by S/P/O");
    Ok(())
}

Source declarations