Fix sqlite error

.gitignore

@@ -1 +1,3 @@
 /target
+db/
+!db/.gitkeep

Cargo.toml

@@ -9,5 +9,5 @@ edition = "2018"
 rocket = { version = "0.5.0-rc.1", features = ["secrets", "tls", "json"] }
 rocket_codegen = "0.5.0-rc.1"
 rocket_sync_db_pools = { version = "0.1.0-rc.1", features = ["diesel_sqlite_pool"] }
-diesel = { version = "1.3", features = ["sqlite", "r2d2"] }
-diesel_migrations = "1.3"
+diesel = { version = "1.4.0", features = ["sqlite", "r2d2"] }
+diesel_migrations = "1.4.0"

migrations/20210708082032_create_tasks_table/down.sql

@@ -0,0 +1 @@
+DROP TABLE tasks

migrations/20210708082032_create_tasks_table/up.sql

@@ -0,0 +1,8 @@
+CREATE TABLE tasks (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    description VARCHAR NOT NULL,
+    completed BOOLEAN NOT NULL DEFAULT 0
+);
+
+INSERT INTO tasks (description) VALUES ("demo task");
+INSERT INTO tasks (description) VALUES ("demo task2");

src/main.rs

@@ -1,6 +1,8 @@
 #[macro_use] extern crate diesel;
+#[macro_use] extern crate diesel_migrations;
 
 use rocket::*;
+use rocket::fairing::AdHoc;
 use rocket_sync_db_pools::{database};
 
 mod task;
@@ -19,7 +21,19 @@ async fn get_log(conn: DbConn, id: i32) -> String {
     format!("test {}, {:?}", id, result)
 }
 
+async fn run_migrations(rocket: Rocket<Build>) -> Rocket<Build> {
+    embed_migrations!();
+
+    let conn = DbConn::get_one(&rocket).await.expect("database connection");
+    conn.run(|c| embedded_migrations::run(c)).await.expect("can run migrations");
+
+    rocket
+}
+
 #[launch]
 fn rocket() -> _ {
-    rocket::build().mount("/", routes![index, get_log]).attach(DbConn::fairing())
+    rocket::build()
+        .mount("/", routes![index, get_log])
+        .attach(DbConn::fairing())
+        .attach(AdHoc::on_ignite("Run Migrations", run_migrations))
 }

src/task.rs

@@ -12,7 +12,7 @@ mod schema {
 }
 
 use schema::tasks;
-use schema::tasks::dsl::{tasks as all_tasks, completed as task_completed};
+use schema::tasks::dsl::{tasks as all_tasks};
 
 use crate::DbConn;