Blueimp SELECT only specific rows - php

Question

this is what I'm struggingling with: https://github.com/blueimp/jQuery-File-Upload
I came across this topic which is simarlar to my problem:
I have some products where you should be able to associate more than one image.
I have 3 tables
products ------------------ img_connecter ------------------- images
p_id p_name fk_p_id fk_i_id i_id i_name
1 Car 1 1 1 car_1.jpg
2 Bus 1 2 2 car_2.jpg
3 Truck 2 3 3 bus_1.jpg
.
This is the code from the UploaderHandler.php file:
protected function get_file_objects($iteration_method = 'get_file_object') {
$upload_dir = $this->get_upload_path();
if (!is_dir($upload_dir)) {
return array();
}
return array_values(array_filter(array_map(
array($this, $iteration_method),
scandir($upload_dir)
)));
}
The scandir function is showing all the images in the folder so i was trying to change it to:
protected function get_file_objects() {
$files = $this->query(" SELECT i_name FROM images i
LEFT JOIN img_connector c ON (c.fk_i_id = i.i_id)
LEFT JOIN products p ON (c.fk_p_id = p.p_id)
WHERE p_id = 1");
$files_array=array();
while($row = $files->fetch()){
array_push($files_array, $row['i_name']);
}
return array_values( array_filter( array_map(
array($this, 'get_file_object'),
$files_array
) ) );
}
The query where it says "WHERE p_id = 1"
1 is going to be a $_GET[] variable. For now I'm just giving it a static number.
I cant figure out why it dosent show the images that the query is pointing too ??
Am I missing something ?

Answer 1

You are only selecting columns id and name (which don't seem to be mentioned in your DB schema above) but then you're referring to a row called i_name in your result set. The query you're looking for is this one:
$files = $this->query("SELECT i_name FROM images i
LEFT JOIN img_connector c ON (c.fk_i_id = i.i_id)
LEFT JOIN products p ON (c.fk_p_id = p.p_id)
WHERE p_id = 1
");
So, next you're (very verbosely) sticking them into an array. Assuming you took my advice and went with PDO for database access, doesn't hurt to grab all the filenames at once:
$files_array = $files->fetchAll(PDO::FETCH_COLUMN);
Then you're passing every instance of the array through $this->get_file_object(), removing any empty ones, and returning the remaining values.
return array_values(
array_filter(
array_map([$this, 'get_file_object'], $files_array)
)
);
So the only thing left to check is what get_file_object is doing. The only instance under which it will return false is if the file doesn't exist in the upload directory. So, ensure the file is where it should be.
All this presupposes that you actually have a valid database connection; doing a var_dump($files_array) should tell you that pretty quickly.