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use crate::{
error::*, ActiveModelTrait, DatabaseConnection, DbBackend, EntityTrait, Insert,
PrimaryKeyTrait, Statement, TryFromU64,
};
use sea_query::InsertStatement;
use std::{future::Future, marker::PhantomData};
#[derive(Clone, Debug)]
pub struct Inserter<A>
where
A: ActiveModelTrait,
{
query: InsertStatement,
model: PhantomData<A>,
}
#[derive(Debug)]
pub struct InsertResult<A>
where
A: ActiveModelTrait,
{
pub last_insert_id: <<<A as ActiveModelTrait>::Entity as EntityTrait>::PrimaryKey as PrimaryKeyTrait>::ValueType,
}
impl<A> Insert<A>
where
A: ActiveModelTrait,
{
#[allow(unused_mut)]
pub fn exec<'a>(
self,
db: &'a DatabaseConnection,
) -> impl Future<Output = Result<InsertResult<A>, DbErr>> + 'a
where
A: 'a,
{
let mut query = self.query;
if db.get_database_backend() == DbBackend::Postgres {
use crate::{sea_query::Query, Iterable};
if <A::Entity as EntityTrait>::PrimaryKey::iter().count() > 0 {
query.returning(
Query::select()
.columns(<A::Entity as EntityTrait>::PrimaryKey::iter())
.take(),
);
}
}
Inserter::<A>::new(query).exec(db)
}
}
impl<A> Inserter<A>
where
A: ActiveModelTrait,
{
pub fn new(query: InsertStatement) -> Self {
Self {
query,
model: PhantomData,
}
}
pub fn exec<'a>(
self,
db: &'a DatabaseConnection,
) -> impl Future<Output = Result<InsertResult<A>, DbErr>> + 'a
where
A: 'a,
{
let builder = db.get_database_backend();
exec_insert(builder.build(&self.query), db)
}
}
async fn exec_insert<A>(
statement: Statement,
db: &DatabaseConnection,
) -> Result<InsertResult<A>, DbErr>
where
A: ActiveModelTrait,
{
type PrimaryKey<A> = <<A as ActiveModelTrait>::Entity as EntityTrait>::PrimaryKey;
type ValueTypeOf<A> = <PrimaryKey<A> as PrimaryKeyTrait>::ValueType;
let last_insert_id = match db.get_database_backend() {
DbBackend::Postgres => {
use crate::{sea_query::Iden, Iterable};
let cols = PrimaryKey::<A>::iter()
.map(|col| col.to_string())
.collect::<Vec<_>>();
let res = db.query_one(statement).await?.unwrap();
res.try_get_many("", cols.as_ref()).unwrap_or_default()
}
_ => {
let last_insert_id = db.execute(statement).await?.last_insert_id();
ValueTypeOf::<A>::try_from_u64(last_insert_id)
.ok()
.unwrap_or_default()
}
};
Ok(InsertResult { last_insert_id })
}