Inserting data into the database

In this section, we build a view that creates a to-do item. If we remember the rules regarding us creating, we do not want to create duplicate to-do items. This can be done with a unique constraint. However, for now, it is good to keep things simple. Instead, we will make a database fail with a filter based on the title that is passed into the view. We then check, and if no results are returned, we insert a new to-do item into the database.

We do this by refactoring the code in the views/to_do/create.rs file. First of all, we reconfigure the imports, as seen in the following code block:

use crate::diesel;
use diesel::prelude::*;
use actix_web::HttpRequest;
use actix_web::Responder;
use crate::database::establish_connection;
use crate::models::item::new_item::NewItem;
use crate::models::item::item::Item;
use crate::schema::to_do;
use super::utils::return_state;

We import the necessary diesel imports to make a query as described in the previous...