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use crate::{
schema::{category, category::dsl::*},
Crud,
};
use diesel::{dsl::*, result::Error, *};
use serde::{Deserialize, Serialize};
#[derive(Queryable, Identifiable, PartialEq, Debug, Serialize, Deserialize)]
#[table_name = "category"]
pub struct Category {
pub id: i32,
pub name: String,
}
#[derive(Insertable, AsChangeset, Clone, Serialize, Deserialize)]
#[table_name = "category"]
pub struct CategoryForm {
pub name: String,
}
impl Crud<CategoryForm> for Category {
fn read(conn: &PgConnection, category_id: i32) -> Result<Self, Error> {
category.find(category_id).first::<Self>(conn)
}
fn delete(conn: &PgConnection, category_id: i32) -> Result<usize, Error> {
diesel::delete(category.find(category_id)).execute(conn)
}
fn create(conn: &PgConnection, new_category: &CategoryForm) -> Result<Self, Error> {
insert_into(category)
.values(new_category)
.get_result::<Self>(conn)
}
fn update(
conn: &PgConnection,
category_id: i32,
new_category: &CategoryForm,
) -> Result<Self, Error> {
diesel::update(category.find(category_id))
.set(new_category)
.get_result::<Self>(conn)
}
}
impl Category {
pub fn list_all(conn: &PgConnection) -> Result<Vec<Self>, Error> {
category.load::<Self>(conn)
}
}
#[cfg(test)]
mod tests {
use crate::{category::Category, tests::establish_unpooled_connection};
#[test]
fn test_crud() {
let conn = establish_unpooled_connection();
let categories = Category::list_all(&conn).unwrap();
let expected_first_category = Category {
id: 1,
name: "Discussion".into(),
};
assert_eq!(expected_first_category, categories[0]);
}
}
|
