Codeigniter活动记录查询

Question

如何将此过程查询编写为codeigniter活动记录查询（update_batch模式）

  UPDATE products SET current_stock = current_stock + 1 where product_id = 1

Answer 1

You can use update_batch like this:

$products = $this->db->get('products'))->result(); 
for( $i = 0; $i < count($products); $i++){
$data[] = array(
                   'product_id' => $product[$i]->product_id,
                   'current_stock' => $product[$i]->current_stock + 1
               );
}
$this->db->update_batch('products', $data, 'product_id');

Answer 2

You can use below query as explained on Codeigniter Query Builder Class :

$this->db->set('current_stock', 'current_stock+1', FALSE);
$this->db->where('product_id', 2);
$result = $this->db->update('products');