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use serde::Deserialize;
use anyhow::Error;
use anyhow::Result;
use diesel::ExpressionMethods;
use diesel::RunQueryDsl;
use diesel::query_dsl::methods::FilterDsl;
use diesel::Connection;
use diesel::BoolExpressionMethods;
use crate::db::DbPool;
use crate::model::Address;
use crate::schema::persons;
use crate::schema;
#[derive(Debug, Deserialize, diesel::Associations, diesel::Queryable, getset::Getters, getset::CopyGetters)]
#[belongs_to(Address)]
#[table_name = "persons"]
pub struct Person {
id: i32,
#[getset(get = "pub")]
name: String,
#[getset(get_copy = "pub")]
age: i32,
address_id: i32,
}
#[derive(Insertable)]
#[table_name = "persons"]
struct NewPerson<'a> {
name: &'a str,
age: i32,
address_id: i32,
}
impl Person {
pub fn create_or_fetch(db: &DbPool, addr: &Address, name: &str, age: i32) -> Result<Self> {
let conn = db.get()?;
conn.transaction::<_, Error, _>(|| {
let new_person = NewPerson {
name,
age,
address_id: addr.id,
};
diesel::insert_into(schema::persons::table)
.values(&new_person)
.on_conflict_do_nothing()
.execute(&conn)?;
schema::persons::table
.filter({
schema::persons::name.eq(name)
.and(schema::persons::age.eq(age))
.and(schema::persons::address_id.eq(addr.id))
})
.first::<Person>(&conn)
.map_err(Error::from)
})
}
}
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