Question

我需要使用此代码从db获取service_price字段。

public function get_service_price($id) { 
 $this->db->select('*');
  $this->db->from('service');
    $this->db->where('id', $id);
    $query = $this->db->get('service');
    return $query->row('service_price');  
}

这里我调用了这个函数函数。

 public function vat($vat=14.5)

 {
  $id = $this->uri->segment(4);
  $data['service_price'] = $this->service_model->get_service_price($id);
  $price_with_vat=0;
  $price_with_vat = $data + ($vat*($data/100));
  //$price_with_vat=78.005;
  $price_with_vat = round($price_with_vat, 2);
  $this->load->view('admin/service/vat', $price_with_vat);
  }

有些错误。请帮助我

Answer 1

要获得第一行

$query = $this->db
->where('id', $id);
->get('service');
$firstRow = $query->first_row();
return $firstRow->service_price;

Answer 2

在模型中

D2

控制器中的

class D2 : public B2{
public:
  virtual void foo() override { cout << __PRETTY_FUNCTION__ << '\n'; }
};

class D :public B1, public D2 
{};

D d;
// d.foo();    // error - ambiguous

D2& d2 = d;
d2.foo();   // calls D2::foo
B2& b2 = d;
b2.foo();   // calls D2::foo

B1& b1 = d;
b1.foo();   // calls B1::foo

在视图中

public function get_service_price($id) {
    $query = $this->db->query("SELECT * FROM service WHERE id='$id'");
    $result = $query->result_array();
    return $result;
}

Answer 3

将此代码用于您的模型：

try this may work for you

$.ajax({
                    type: "POST",
                    url: 'http://localhost:8080/IDNS_Rule_Configuration/idns/idnsData/importYaml',
                    enctype: "multipart/form-data",
                    data: formData,
                    processData: false,  
                    contentType: false,
                    success: function (data) {
    //some success functions
    }
    });

如何使用codeigniter和mysql获取单个值

3 个答案: