PHP - Some Advice On Event Manager Rss Feed.

Hi,

Trying to build a simple homework manager for the school I am Head of ICT in, using PHP and MySQL. Currently at the design stage - so no code to share yet. But I will share with you how I intend to get it working, and the issue I have...

I anticipate having 5 tables

Table 1
Student_ID  |   Student_name

Table 2
Class_ID  |  Teacher_name

Table 3

Student_ID  |  Class_ID

Table 4

Class_ID  | Class_name

Table 5

Class_ID | Activity | Date_set | Date_due | Visible

So, at its simplest it should be possible to select from the database all classes that match your student_id and show the homework set for those. Also, I have a visible tag set so that teachers can pseudo delete homeworks using a small control panel.

But what I would like to do, is allow the students to set whether or not they have done the homework (kind of like a task in remember the milk) - but obvioulsy they cant have access to the database.

Anyone got any idea how this could be achieved?

looking for suggestions and experiences from those of you that use a Password Manager

hi i have the script below which copies data from one table to another but will only insert new data update current data or delete old data from tempproducts to products then it will delete the tempproducts from the db however i keep getting this error:

Warning: mssql_query() [function.mssql-query]: Query failed in E:\UpdateProducts.php on line 33

updateproducts.php
Code: [Select]
<?php
include('../../otherscripts/functions.php');
$log = new Logging(); 

// create DB connection
 $host = "localhost";
 $user = "user";
 $pass = "pass";
 $mydb = "db";

 $db = mssql_connect($host,$user,$pass);
 
//Select Database
 mssql_select_db($mydb);
 

 // delete all old data
    $sql0 = "SELECT * FROM tempproduct";
    $sql1 = "INSERT INTO products SELECT * FROM tempproduct WHERE manf_part_no NOT IN (SELECT manf_part_no FROM products) AND supp_id NOT IN (SELECT supp_id FROM products)";
    $sql2 = "DELETE FROM products WHERE manf_part_no NOT IN (SELECT manf_part_no FROM tempproduct) AND supp_id NOT IN (SELECT supp_id FROM tempproduct)";
    $sql3 = "UPDATE p1 SET p1.avail_qty = t1.avail_qty, p1.cost_price = t1.cost_price, p1.rrp = t1.rrp, p1.date_added = t1.date_added, p1.description = t1.description FROM Products p1 INNER JOIN tempproduct t1 ON (p1.manf_part_no = t1.manf_part_no AND p1.supp_id = t1.supp_id)";
    $sql4 = "TRUNCATE TABLE tempproduct";

//If tempproduct is empty done Execute Commands if it is full then execute commands

$query = mssql_query($sql0) or die($log->lwrite('Failed to select for count from db'));
$rowcount = mssql_num_rows($query);

if($rowcount == 0){
$log->lwrite('Teh tempproduct am emptyish');
}
else{
   mssql_query($sql1) or die($log->lwrite('Failed to insert to db'.$sql1));
   mssql_query($sql2) or die($log->lwrite('Failed to Delete from db'));
   mssql_query($sql3) or die($log->lwrite('Failed to Update db'));
   mssql_query($sql4) or die ($log->lwrite('Failed to TRUNCATE db'));
}
?>

if i run $sql1 command in the sql manager it runs fine and no errors occur?

This topic has been moved to PHP Applications.

http://www.phpfreaks.com/forums/index.php?topic=330163.0

I have a listener which executes a HTTP request to a remote API before the User entity is persisted and uses the response to set one of the entity's properties.  It will also listen for update and remove and will make the appropriate HTTP request to the API but will not modify the entity.  All works as desired... Almost.  If when persisting the entity, I have some error, the remote API and my application become out of sync.  I wish to change my application to perform a second call to the API if an error occurs and reverse the previous call.  My thoughts on how to implement a

Place a try/catch block when executing the query.  Don't like this approach. Add an ExceptionListener which somehow retrieves the entity and makes the applicable changes.  Maybe part of the solution, but too complicated to be the full solution. When adding, updating, or deleting a user from the remote API under UserListener's three methods, adding a callback which gets executed upon a PDOException.  I think this is the best approach and expanded my thoughts below.

 

<?php

namespace App\EventListener;

use Doctrine\Persistence\Event\LifecycleEventArgs;
use App\Service\HelpDeskClient;
use App\Entity\AbstractUser;

final class UserListner
{
    private $helpDeskClient;

    public function __construct(HelpDeskClient $helpDeskClient)
    {
        $this->helpDeskClient = $helpDeskClient;
    }

    public function prePersist(AbstractUser $user, LifecycleEventArgs $event)
    {
        $this->helpDeskClient->addUser($user);   //$user will be updated with the HTTP response
    }

    public function preUpdate(AbstractUser $user, LifecycleEventArgs $event)
    {
        $this->helpDeskClient->updateUser($user);
    }

    public function preRemove (AbstractUser $user, LifecycleEventArgs $event)
    {
        $this->helpDeskClient->deleteUser($user);
    }
}

Okay, how do I actually do this?  Was thinking of modifying UserListner as follows:

//...
use Symfony\Component\HttpKernel\KernelEvents;

final class UserListner
{
    // ...
    
    public function prePersist(AbstractUser $user, LifecycleEventArgs $event)
    {
        $this->helpDeskClient->addUser($user);
        
        $event->getObjectManager()->getEventManager()->addEventListener(KernelEvents::EXCEPTION, function($something) use($user) {
            // Use $this->helpDeskClient to reverse the changes
        });
    }
    
    // Similar for update and remove
}

 

But when trying this approach, I get a PDOException, but my callback never gets excecated.  I've also tried replacing KernelEvents::EXCEPTION with '\PDOException' (note the quotes) with no success.

Any ideas what I should be doing differently?

Maybe some totally different approach?  I suppose I could make the request to the API after the DB query is complete for updating and deleting, but not for adding.