[FIXED] why is this imagepng not working?

Issue

image_small.php looks like this:

<?php
$id = (isset($_GET['im'])) ? $_GET['im'] : 0;

//fetch the image from database
$query='SELECT image_small FROM hr_employee WHERE id='.$id;
$result = pg_query($dbconn, $query) or die('Query failed: ' . pg_last_error());

$raw = pg_fetch_row ( $result ,0)
$img=$raw['image_small'];

header("Content-Type: image/png");

if( !file_exists($cachefile) ) {
    imagepng($img, $cachefile);
    imagedestroy($img);
}

$fp = fopen($cachefile, 'rb');
fpassthru($fp);
exit;
?>

I get the following error:

imagepng() expects parameter 1 to be resource, string given

Solution

The error is very explicit, imagepng expects a resource. To be simple, imagine a resource as an object from which you cant't know the class. In fact, GD is developped in C language, and PHP wraps all unknown C structures inside resources.

So, you need to ask GD to create this resource for you, before using gd-family functions. If you stored your image raw, you'll get it raw and will need to use imagecreatefromstring function.

$gdh = imagecreatefromstring($img);
imagepng($gdh, $cachefile);

Answered By - Alain Tiemblo

Answer Checked By - Pedro (PHPFixing Volunteer)

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[FIXED] What is the difference between "warning" and "UserError" in odoo?

Issue

Warning:

warning = {
                    'title': _('Warning!'),
                    'message': _('Exists the discount limit'),
                }
            return {'warning': warning}

UserError

raise UserError(_('Exists the discount limit'))

What is the difference between Warning and UserError in odoo

Solution

To answer it in simple manner, both are same in odoo. Because if you check in odoo/exception.py refer odoo exception here

It clearly understood that it is referring Warning as UserError. odoo warning is deprecated in odoo v9 and v10 due to ambiguity or collision with python built-in.

To get the information about python warning refer python warning documentation.

So it is recommended to use odoo.exceptions.UserError instead of Warning

Answered By - Janarthanan Ramu

Answer Checked By - Marie Seifert (PHPFixing Admin)

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