Update Database Field Error CodeIgniter

问题

I am getting the following error message in CodeIgniter 2.1:

A PHP Error was encountered

Severity: Notice

Message: Array to string conversion

Filename: database/DB_active_rec.php

Line Number: 1407

I'm trying to update fields in my database. I have this code and every tutorial are just the same for batch upload. It works anyway but the thing is it display such an error.

this what i have in my model:

function update2($data){
   $this->db->update_batch('users',$data, "id");
}

This what i have in my controller:

public function updateValues(){
    $this->load->model('get_db');
    $newRow = array(
        array(
            'id' => '3',
            'firstname' => 'Rapphie'
        ),
        array(
            'id' => '2',
            'firstname' => 'Charmie'
        )
    );
    $this->get_db->update2($newRow);
    echo "it has been updated";
}

回答1:

try this hope its work

function update2($data){
   foreach($data as $string_val){
   $this->db->update_batch('users',$string_val, "id");
    }
}

function update2($data){
   foreach($data as $string_val){
   $this->db->update_batch('users',$string_val->first_name, "id");
    }
}

回答2:

Just stumbled upon the exact same problem here. Fortunately, I'm using the same CI version. :)

It's true that the answer from M_A_K helps remove the "Notice", but I don't think that is the right solution for the problem. So I decided to take a look at line 1407 in DB_active_rec.php and I believe that this is nothing but a minor bug in CI 2.1.2.

Here's my fix. I simply changed the original code:

$not[] = $k.'-'.$v;

into this:

$not[] = $k2.'-'.$v2;

Voila! The "Notice" doesn't appear anymore. :)

We can clearly see that line 1407 was not meant to use $k and $v because line 1407 is inside a foreach loop iterating through $v as $k2 and $v2.

I hope I'm making myself clear.

回答3:

Just realized that using a foreach like M_A_K suggested actually beats the purpose of using the update_batch function. This is because by using foreach, we're actually doing single update (not batch) for each array elements. This is no different than using the (single) update function in CodeIgniter.

回答4:

I always feel a little dirty for doing this but you can always just suppress errors for that one line of code too!

function update2($data){
   @$this->db->update_batch('users',$data, "id");
}

Of course the proper thing to do is upgrade to 2.1.3 (haven't tested or looked so I'll assume it's fixed.)

回答5:

Correct solution is to remove lines 1401 - 1404 from DB_active_rec.php as the $not variable is not used anywhere.

来源：https://stackoverflow.com/questions/11279262/update-database-field-error-codeigniter

标签

php

mysql

codeigniter

codeigniter-2