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use super::RunQueryDsl;
use backend::Backend;
use connection::Connection;
use deserialize::Queryable;
use query_builder::{AsQuery, QueryFragment, QueryId};
use result::QueryResult;
use sql_types::HasSqlType;
pub trait LoadQuery<Conn, U>: RunQueryDsl<Conn> {
fn internal_load(self, conn: &Conn) -> QueryResult<Vec<U>>;
}
impl<Conn, T, U> LoadQuery<Conn, U> for T
where
Conn: Connection,
Conn::Backend: HasSqlType<T::SqlType>,
T: AsQuery + RunQueryDsl<Conn>,
T::Query: QueryFragment<Conn::Backend> + QueryId,
U: Queryable<T::SqlType, Conn::Backend>,
{
fn internal_load(self, conn: &Conn) -> QueryResult<Vec<U>> {
conn.query_by_index(self)
}
}
pub trait ExecuteDsl<Conn: Connection<Backend = DB>, DB: Backend = <Conn as Connection>::Backend>:
Sized
{
fn execute(query: Self, conn: &Conn) -> QueryResult<usize>;
}
impl<Conn, DB, T> ExecuteDsl<Conn, DB> for T
where
Conn: Connection<Backend = DB>,
DB: Backend,
T: QueryFragment<DB> + QueryId,
{
fn execute(query: Self, conn: &Conn) -> QueryResult<usize> {
conn.execute_returning_count(&query)
}
}