错误：获取非对象的属性 [英] Error : get property of non-object

问题描述

可能重复：

调用非对象上的成员函数

我收到这个错误：尝试获取非对象的属性[从模型]
当我尝试从数据库中检索id通过输入一个字符串，在这种情况下是'something' / p>

这是我的模型

  function getRoleId（$ role_name = ）
 {
 
 $ condition = array（'role_name'=> $ role_name）; 
 $ this-> db-> where（$ conditions）; 
 $ this-> db-> select（'id'）; 
 $ query = $ this-> db-> get（'roles'）; 
 $ row = $ query-> row（） 
 return $ row-> id; 
} 
  

控制器（$ radioRole这里是= something），但是当它到达模型成为别的东西。

  $ radioRole ='something'; 
 $ insertData ['role_id'] = $ this-> user_model-> getRoleId（$ radioRole）; 
  

UPDATE

  print_r（$ radioRole）; 
 $ insertData ['role_id'] = $ this-> user_model-> getRoleId（$ radioRole）; 
 

显示$ radioRole，在这种情况下为something

但是当它到达user_model和当我做一个print_r它显示别的东西，'买家'，它甚至不显示print_r做在控制器。感觉像是写的：O但我不知道：O

print_r（$ query）

  CI_DB_mysql_result对象（[conn_id] =>资源ID＃37 [result_id] =>资源ID＃64 [result_array] => Array（）[result_object] =& [current_row] => 0 [num_rows] => 0 [row_data] =>）
  

解决方案

您的其中错了：

 code> $ conditions = array（'role_name'=> $ role_name）; 
 $ this-> db-> where（$ conditions）; 
  

应为

  $ conditions = array（'role_name'，$ role_name）; 
 $ this-> db-> where（$ conditions）; 
  

<

，如果条件直接在中，则必须使用逗号，因为 / p>



  $ this-> db->其中（'role_name'，$ role_name） 
  




Possible Duplicate:
Call to a member function on a non-object

I receive this error : Trying to get property of non-object [from Model] When i try to retrieve id from database by inputting a string which in this case is 'something'

This is my Model

   function getRoleId($role_name='')
         {

            $conditions = array('role_name'=> $role_name);
            $this->db->where($conditions);
            $this->db->select('id');
            $query = $this->db->get('roles');       
            $row   = $query->row();
            return $row->id;
         }

Controller ($radioRole here is = something) but when it reaches the model it becomes something else.

$radioRole  = 'something';
$insertData['role_id']            = $this->user_model->getRoleId($radioRole);

UPDATE

print_r($radioRole);
$insertData['role_id']            = $this->user_model->getRoleId($radioRole);

Shows $radioRole which is in this case 'something'

but when it reaches user_model and when i do a print_r it shows something else, 'buyer' , it doesnt even show the print_r done on controller. Feels like its being over written :O but i got no idea :O

print_r($query)

  CI_DB_mysql_result Object ( [conn_id] => Resource id #37 [result_id] => Resource id #64 [result_array] => Array ( ) [result_object] => Array ( ) [current_row] => 0 [num_rows] => 0 [row_data] => )

解决方案

Your where is wrong:

$conditions = array('role_name'=> $role_name);
$this->db->where($conditions);

should be

$conditions = array('role_name', $role_name);
$this->db->where($conditions);

EDIT:

as mentioned in the comments, the comma is necessary if the condition is directly within the where as such:

$this->db->where('role_name',$role_name);

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