Method views_containing_change

atomic-repository/src/repository/views.rs:424–459

Return the names of all views whose change-set references `hash`.

(&self, hash: &Hash)

    /// Return the names of all views whose change-set references `hash`.
    pub fn views_containing_change(&self, hash: &Hash) -> Result<Vec<String>, RepositoryError> {
        let txn = self
            .pristine
            .read_txn()
            .map_err(|e| RepositoryError::Database(e.to_string()))?;

        let change_id = match txn
            .get_internal(hash)
            .map_err(|e| RepositoryError::Database(e.to_string()))?
        {
            Some(id) => id,
            None => return Ok(vec![]),
        };

        let mut names = Vec::new();
        for name in txn
            .list_views()
            .map_err(|e| RepositoryError::Database(e.to_string()))?
        {
            let view = match txn
                .get_view(&name)
                .map_err(|e| RepositoryError::Database(e.to_string()))?
            {
                Some(view) => view,
                None => continue,
            };
            if txn
                .get_change_seq(&view, change_id)
                .map_err(|e| RepositoryError::Database(e.to_string()))?
                .is_some()
            {
                names.push(name);
            }
        }
        Ok(names)
    }

    /// Check if a view exists.
    ///