feat: insert works

__database/diesel/Cargo.lock

@@ -6,14 +6,6 @@ version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ae44d1a3d5a19df61dd0c8beb138458ac2a53a7ac09eba97d55592540004306b"
 
-[[package]]
-name = "diesel"
-version = "0.1.0"
-dependencies = [
- "diesel 1.4.5",
- "dotenv",
-]
-
 [[package]]
 name = "diesel"
 version = "1.4.5"
@@ -25,6 +17,14 @@ dependencies = [
  "libsqlite3-sys",
 ]
 
+[[package]]
+name = "diesel_demo"
+version = "0.1.0"
+dependencies = [
+ "diesel",
+ "dotenv",
+]
+
 [[package]]
 name = "diesel_derives"
 version = "1.4.1"

__database/diesel/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "diesel"
+name = "diesel_demo"
 version = "0.1.0"
 authors = ["Hatter Jiang <jht5945@gmail.com>"]
 edition = "2018"
@@ -9,4 +9,3 @@ edition = "2018"
 [dependencies]
 diesel = { version = "1.4.5", features = ["sqlite"] }
 dotenv = "0.15.0"
-

__database/diesel/README.md

@@ -8,3 +8,6 @@ diesel setup --database-url=file:test.db
 diesel migration generate create_posts
 
 diesel migration run --database-url=file:test.db
+
+
+https://github.com/diesel-rs/diesel/tree/master/examples/sqlite/getting_started_step_3

__database/diesel/src/main.rs

@@ -8,23 +8,22 @@ use diesel::prelude::*;
 use diesel::sqlite::SqliteConnection;
 use dotenv::dotenv;
 use std::env;
-use crate::models::Post;
+use crate::models::NewPost;
 
 fn main() {
-    use crate::schema::posts::dsl::*;
-
     let connection = establish_connection();
-    let results = posts.filter(published.eq(true))
-        .limit(5)
-        .load::<Post>(&connection)
-        .expect("Error loading posts");
-
-    println!("Displaying {} posts", results.len());
-    for post in results {
-        println!("{}", post.title);
-        println!("----------\n");
-        println!("{}", post.body);
+    create_post(&connection, "hello world", "this is a post!");
 }
+
+pub fn create_post(conn: &SqliteConnection, title: &str, body: &str) -> usize {
+    use crate::schema::posts;
+
+    let new_post = NewPost { title, body };
+
+    diesel::insert_into(posts::table)
+        .values(&new_post)
+        .execute(conn)
+        .expect("Error saving new post")
 }
 
 pub fn establish_connection() -> SqliteConnection {

__database/diesel/src/models.rs

@@ -1,3 +1,5 @@
+use crate::schema::posts;
+
 #[derive(Queryable)]
 pub struct Post {
     pub id: i32,
@@ -5,3 +7,10 @@ pub struct Post {
     pub body: String,
     pub published: bool,
 }
+
+#[derive(Insertable)]
+#[table_name = "posts"]
+pub struct NewPost<'a> {
+    pub title: &'a str,
+    pub body: &'a str,
+}