Question

嘿伙计们我有点问题。我想要的只是在我的表中插入一个外键值。这是我在mysql中的create table语句。

CREATE TABLE `sales` (
 `sales_id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
 `fkmember` INT(10) UNSIGNED NOT NULL,
 `date_of_sales` DATETIME NOT NULL,
 PRIMARY KEY (`sales_id`),
 INDEX `fkmember` (`fkmember`),
 CONSTRAINT `sales_ibfk_1` FOREIGN KEY (`fkmember`) REFERENCES `member` (`member_id`)
)
COLLATE='utf8_general_ci'
ENGINE=InnoDB
AUTO_INCREMENT=3;


CREATE TABLE `sales_line` (
 `line_id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
 `fkproduct` INT(10) UNSIGNED NOT NULL,
 `fksales` INT(10) UNSIGNED NOT NULL,
 `quantity_purchased` INT(10) UNSIGNED NOT NULL,
 `subtotal` FLOAT(7,2) UNSIGNED NOT NULL,
 PRIMARY KEY (`line_id`),
 INDEX `fkproduct` (`fkproduct`),
 INDEX `fksales` (`fksales`),
 CONSTRAINT `sales_line_ibfk_1` FOREIGN KEY (`fkproduct`) REFERENCES `product` (`product_id`),
 CONSTRAINT `sales_line_ibfk_2` FOREIGN KEY (`fksales`) REFERENCES `sales` (`sales_id`)
)

我的表结构：

销售表 sales_id | fkmember | date_of_sales |

我在两个表中插入值的代码：

foreach($products as $p){
        $data = array(
            'sales_id' => null,
            'fkmember' => $memberid
            'name' => $p['product_name']
        );
        $this->db->insert('sales',$data);
    }
   foreach($products as $p){
        $data = array(
            'line_id' => null,
            'fk_product' => $p['id'],
            'fk_sales' => null,
            'quantity_purchased' => $p['product_qty'],
            'subtotal' => number_format($subtotal,2)
        );
        $this->db->insert('sales_line',$data);
    }
    }

我知道在插入fk_sales中的值时插入值时出错。如何在此字段中插入来自销售表的ID的值？因为我想在一轮中插入这两个表。请帮帮我。感谢

Answer 1

试试这个（注意使用$this->db->insert_id()）：

    foreach($products as $p){
        $data = array(
            'sales_id' => null,
            'fkmember' => $memberid
            'name' => $p['product_name']
        );
        $this->db->insert('sales',$data);
    }

    $sales_insert_id = $this->db->insert_id();

    foreach($products as $p){
        $data = array(
            'line_id' => null,
            'fk_product' => $p['id'],
            'fk_sales' => $sales_insert_id,
            'quantity_purchased' => $p['product_qty'],
            'subtotal' => number_format($subtotal,2)
        );
        $this->db->insert('sales_line',$data);
    }

Answer 2

查看Codeigniter Database Helper guide here。第一个函数是$ this-＆gt; db-＆gt; insert_id（）;

所以你可以使用它;

 $this->db->insert('sales',$data);
 $fk_sales_id = $this->db->insert_id();

Answer 3

在您的控制器功能中，首先插入销售条目，然后返回销售ID，然后使用返回的ID插入销售行，如下所示。

Eg: 
//Controller function

  //insert the sales record and get the sales id
  $sales_id = $this->model_sale->insert_sale($mameber_id, $product_name); 

foreach($products as $p)
{
  //insert sales line
  $this->model_sales_line->insert_sales_line($sales_id, $p['id'],$p['product_qty'],$sub_total);
}

//Sales Model

public function insert_sale($mameber_id, $product_name)
{
 $data = array(            
        'fkmember' => $memberid
        'name' => $p['product_name']
    );
    $this->db->insert('sales',$data);

   return $this->db->insert_id();
}

如果正确，请不要忘记接受任何答案。

在mysql中插入外键值（codeigniter）

3 个答案: