Method get_metadata

src/db/metadata.rs:9–32

Reads a metadata value by key, returning `None` if not set.

(&self, key: &str)

impl Database {
    /// Reads a metadata value by key, returning `None` if not set.
    pub async fn get_metadata(&self, key: &str) -> Result<Option<String>> {
        let mut rows = self
            .conn()
            .query("SELECT value FROM metadata WHERE key = ?1", params![key])
            .await
            .map_err(|e| TraceDecayError::Database {
                message: format!("failed to query metadata: {e}"),
                operation: "get_metadata".to_string(),
            })?;

        match rows.next().await.map_err(|e| TraceDecayError::Database {
            message: format!("failed to read metadata row: {e}"),
            operation: "get_metadata".to_string(),
        })? {
            Some(row) => {
                let value: String = row.get(0).map_err(|e| TraceDecayError::Database {
                    message: format!("failed to read metadata value: {e}"),
                    operation: "get_metadata".to_string(),
                })?;
                Ok(Some(value))
            }
            None => Ok(None),
        }
    }

    /// Sets a metadata value, creating or replacing the entry.
    pub async fn set_metadata(&self, key: &str, value: &str) -> Result<()> {