php - 左连接的 MySQL/doctrine 问题

Question

我对数据库的 Doctrine 查询有疑问，我不确定哪里出了问题。 这是交易: 这是我用来创建数据库的实际 mysql 查询:

            create table productos ( 
                codigoProducto int (8) unsigned auto_increment primary key, 
                nombre varchar(100) not null,
                id_categoria smallint(3) unsigned,
                descripcion text,
                foto varchar(100),
                precio smallint (4) unsigned not null, 
                visitado int (7),
                habilitado boolean,

                foreign key (id_categoria) 
                references  categorias(id)
                on update cascade
                on delete restrict
            )engine=innoDB;

            create table facturas( 
                id int (8) unsigned auto_increment primary key,
                id_comprador int (7) unsigned, 
                metodo_pago boolean,
                forma_entrega boolean,
                fecha datetime,

                foreign key (id_comprador)
                references  compradores(id)
                on update cascade
                on delete cascade
            )engine=innoDB;

            create table detallefactura(
                id int(8) unsigned auto_increment primary key,
                id_producto int(8) unsigned,
                id_factura int(8) unsigned,
                cantidad smallint (4),

                foreign key(id_producto)
                references productos(codigoProducto)
                on update cascade
                on delete cascade,

                foreign key(id_factura)
                references facturas(id)
                on update cascade
                on delete cascade
            )engine=innoDB;

“detalleFactura”是“productos”和“facturas”的连接表，以便每张发票包含 1 个以上的产品。因此，对于以下内容，我试图将购买的所有产品都放在一张发票中:

            static function traerProductosComprados($id){
                $query = Doctrine_Query::create()
                        ->select('d.id, p.nombre, p.precio, d.cantidad')
                        ->from('Detallefactura d')
                        ->leftjoin('d.Productos p')
                        ->where('d.id_factura = ?',$id);
                return $query->execute()->toArray();
            }

如果我回显查询，它会显示以下内容:

            SELECT d.id, p.nombre, p.precio, d.cantidad FROM Detallefactura d LEFT JOIN d.Productos p WHERE d.id_factura = ?    

当我将其粘贴到 phpmyadmin 时，它会抛出以下错误:

1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'WHERE d.id_factura = ? LIMIT 0, 30' at line 1;

我现在没主意了，如果还有什么我想念的，请告诉我!

Answer 1

您需要为左连接指定 ON 子句