在codeigniter中插入新记录并同时更新现有记录

Question

This is my code for save and update purchase order.

  function save(&$purchase_data,$purchase_id)
    {
        $success=false;

        //Run these queries as a transaction, we want to make sure we do all or nothing
        $this->db->trans_start();

        if($purchase_data)
        {
            if (!$purchase_id or !$this->exists($purchase_id))
            {  
                //$purchase_data['purchase_id'] = $purchase_id = $purchase_data['purchase_id'];
                $success = $this->db->insert('purchase_order',$purchase_data);
                $post_array['cart']=$this->session->userdata('data');
                /*print_r($post_array);
                exit;*/
                $purchase_id=$this->db->insert_id();
                $i=0;
    foreach($post_array['cart'] as $item)
    {
        //echo "<pre>"; print_r($item); echo "</pre>";
        $query = $this->db->query("SELECT name FROM phppos_items WHERE item_id='".$item['product_id']."'");
        foreach ($query->result() as $row)
{
    $product_name=$row->name;

}
        $product_id=$item['product_id'];
        $quantity=$item['quantity'];
        $unit=$item['unit'];
        $unit_rate=$item['unit_rate'];
        $query = $this->db->query("insert into phppos_productdetails(product_id,product_name,quantity,unit,unit_rate,purchase_id) values ('$product_id','$product_name','$quantity','$unit','$unit_rate','$purchase_id')");

        $i++;
    }
            }
            else
            {

                $this->db->where('purchase_id', $purchase_id);
                $success = $this->db->update('purchase_order',$purchase_data);
                //$this->session->set_userdata('sess_products');
                $post_array['cart']=$this->session->userdata('sess_products');

                $i=0;
    foreach($post_array['cart'] as $item)
    {
        echo "<pre>"; print_r($item); echo "</pre>";

        $query = $this->db->query("SELECT name FROM phppos_items WHERE item_id='".$item['product_id']."'");
        foreach ($query->result() as $row)
{
    $product_name=$row->name;

}

        $product_id=$item['product_id'];
        $quantity=$item['quantity'];
        $unit=$item['unit'];
        $unit_rate=$item['unit_rate'];

        $query = $this->db->query("update phppos_productdetails set product_id='$product_id',product_name='$product_name',quantity='$quantity',unit='$unit',unit_rate='$unit_rate' where purchase_id='$purchase_id'");

        $i++;
    }   

            }




        }

        $this->db->trans_complete();        
        return $success;
    }

Save code is working correctly but at the time of editing only newly inserted record is saved to database. This is the code for getting product details from database and storing them in session at the time of editing..

function get_update_product(){

        $purchase_id=$_POST['purchase_id'];
        if($purchase_id!=''){
            //$post_array['cart']='';
            $res = $this->db->query("select * from phppos_productdetails WHERE purchase_id='$purchase_id'");
            ?>
            <tr>
                <th>Product  Name</th>
                <th>Quantity</th>
                <th>Unit</th>
                <th>Unit Rate</th>
                <th>Action</th>
            </tr>
            <?php
            $i=0;
            foreach($res->result() as $row ){
                $sess_products[$i]['product_id'] = $row->product_id;
                $sess_products[$i]['quantity'] = $row->quantity;
                $sess_products[$i]['unit'] = $row->unit;
                $sess_products[$i]['unit_rate'] = $row->unit_rate;

                $this->session->set_userdata('sess_products',$sess_products);
                //$post_array['cart']=$this->session->userdata('sess_products');

                $query = $this->db->query("SELECT name FROM phppos_items WHERE item_id='".$row->product_id."'");
                foreach($query->result() as $row1 ){
                    $product_name=$row1->name;

                }
                echo "<tr>";
                echo "<td><input type='hidden'  style='width:80%;'  value='".$row->product_id."' name='product_id[]'/></td>";
                echo "<td><input type='hidden'  style='width:80%;'  value='".$product_name."' name='product_name[]'/></td>";
                echo "</tr>";
                echo "<tr>";
                echo "<td style='width:40%;'>".$product_name."</td>";

                echo "<td><input type='text' class='quantity' style='width:100%;' value='".$row->quantity."' name='quantity[]'/></td>";
                echo "<td><input type='text' class='quantity' style='width:100%;' value='".$row->unit."' name='unit[]'/></td>";
                echo "<td><input type='text' class='quantity' style='width:100%;' value='".$row->unit_rate."' name='unit_rate[]'/></td>";
                echo "<td><a href='javascript:void(0)' rownum='".$i."' class='remove_from_update_cart'><img src='images/close.png'/></a></td>";
                echo "</tr>";
                $i++;

            }


        }
    }

Anybody has any idea about this??

Answer 1

您可以通过以下行在codeigniter中更新会话

$this->session->set_userdata('your_session_variable',$products);