Appendix

The following is the code for implementing database transactions for getting to-do items and updating those to-do items. These were skipped in this chapter to avoid bloat, as the delete and create database transactions followed the same structure with slightly different SQL, inputs, and outputs:

// file: nanoservices/to_do/dal/src/to_do_items/
// transactions/get.rs
use crate::to_do_items::schema::ToDoItem;
use glue::errors::NanoServiceError;
use std::future::Future;
#[cfg(feature = "json-file")]
use super::super::descriptors::JsonFileDescriptor;
#[cfg(feature = "json-file")]
use crate::json_file::get_all;
#[cfg(feature = "json-file")]
use std::collections::HashMap;
#[cfg(feature = "sqlx-postgres")]
use crate::connections::sqlx_postgres::SQLX_POSTGRES_POOL;
#[cfg(feature = "sqlx-postgres")]
use super::super::descriptors::SqlxPostGresDescriptor;
#[cfg(feature = "sqlx-postgres")]
use glue::errors::NanoServiceErrorStatus...