funman300
35 lines
1.3 KiB
Rust
35 lines
1.3 KiB
Rust
//! Generic read/write for [`crate::models::game_ext`] opaque state.
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//!
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//! Core never interprets the payload. Writes happen INSIDE the owning entity's
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//! transaction (see `squad::replace_squad_with_extension`) so the canonical
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//! entity and its opaque extension commit atomically — there is deliberately no
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//! standalone "write extension" entry point that could desync the two.
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use crate::db::Pool;
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use crate::error::AppResult;
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use crate::models::game_ext::GameEntityExt;
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/// Fetch the stored opaque extension for a scoped entity, or `None`. The caller
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/// compares `canonical_fingerprint` against the entity's *current* fingerprint to
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/// decide freshness — this layer does not know how to fingerprint any entity.
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pub async fn get_ext(
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pool: &Pool,
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game_id: &str,
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entity_kind: &str,
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entity_id: &str,
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namespace: &str,
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) -> AppResult<Option<GameEntityExt>> {
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let row = sqlx::query_as::<_, GameEntityExt>(
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"SELECT game_id, entity_kind, entity_id, namespace, schema_version, \
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canonical_fingerprint, payload, updated_at FROM game_entity_ext \
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WHERE game_id = ? AND entity_kind = ? AND entity_id = ? AND namespace = ?",
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)
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.bind(game_id)
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.bind(entity_kind)
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.bind(entity_id)
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.bind(namespace)
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.fetch_optional(pool)
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.await?;
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Ok(row)
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}
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