PHP - Creating Doctrine Inherited Class

Hey, this is my first time using this forum, so I apologize if I miss something and I'd like to thank you in advance for your help.

I inherited some code from a different php programmer and it's not quite working right.

The basics:  We have a form for users to fill out where they select a Township from a drop down menu, then based on the township they choose there is a 2nd drop down populated with Range values.

I can get the Township drop down to populate from the mysql database, but once you select the Township, the 2nd drop down does not populate as expected.  This worked on the old web server (which I regrettably no longer have access to), but it's not working on the new web server.  I hope that the problem is just a version issue where some syntax changed, but I'm not sure.

Here's the function:

Code: [Select]
<?php
   echo "<form method='post' name='tsform' id='tsform' action='".$_SERVER['PHP_SELF']."'><input type=hidden name='page' id='page' value='viewfntown'>";
   echo "<table><tr VALIGN=baseline><td></td>";
   echo "<td>Township: <select name='ts' id='ts'><option value=''></option>";
   $sql="SELECT distinct(township) from `linksurv_field_notes` WHERE `township`!='' order by `township`;";
   $result=mysql_query($sql) or die("ts sel:".mysql_error());
   $NumResults=mysql_num_rows($result);

   for ($q=1;$q<=$NumResults;$q++) {
     $row=mysql_fetch_row($result);
     $township=$row[0];
        echo "<option value='".$township."'>".$township."</option>";
   }
   echo "</select></td>";
   echo "<td>Range: <select name='rg' id='rg'><option value=''></option>";
   $sql="SELECT distinct(range) from `linksurv_field_notes` WHERE `range`!='' order by `range`;";
   $result=mysql_query($sql) or die("rg sel:".mysql_error());
   $NumResults=mysql_num_rows($result);

   for ($q=1;$q<=$NumResults;$q++) {
     $row=mysql_fetch_row($result);
     $range=$row[0];
        echo "<option value='".$range."'>".$range."</option>";
   }
   echo "</select></td>";
   echo "<td><button type=button onClick=\"return submitCorner('NA','NA');\">Show All Corners</button></td>";
   echo "</tr>";
   echo "</table>";
   ?>

Also, here is the error I see in Firebug:

Code: [Select]
rg sel:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'range) from `linksurv_field_notes` WHERE `range`!='' order by `range`' at line 1

I've been stumped on this for a few weeks and any help you can give is appreciated.  If I left some details out, just ask.  Thanks.

So, I was given the task of editing a website. It was done in PHP for the most part.   If you visit the page http://cre-finance.com/?Contact-Us, I'm attempting to edit the contact info at the bottom but I have no idea where to find it in the website files. If you the view the source, it's right there like it's taunting me  but none of the php files have that info in it. There is a contactus.php (I attached the code for it) but all it has is the code for the form at the bottom of the Contact Us page.   I've noticed references to "?p=Contact-Us" in the source, and also in the sitemap.xml file but I have no idea what that really means because there are no other "contactus" pages other than the one I mentioned above. I guess I'm not really looking for help with actual coding but perhaps to be pointed in the right direction to edit that information.   HELP! Attached Files  contact_us.php   3.55KB   0 downloads

I think I am close, but not sure if I am quite there.  Am I doing this correctly?

I have several entity classes which will use class type inheritance:

MyNamespace\MyApp\Vehicle\Vehicle
    MyNamespace\MyApp\Vehicle\AirVehicle\AirVehicle
        MyNamespace\MyApp\Vehicle\AirVehicle\Airplane\Airplane
        MyNamespace\MyApp\Vehicle\AirVehicle\Rocket\Rocket
    MyNamespace\MyApp\Vehicle\GroundVehicle\GroundVehicle
        MyNamespace\MyApp\Vehicle\GroundVehicle\Car\Car
        MyNamespace\MyApp\Vehicle\GroundVehicle\Train\Train
                
The entity meta data is as follows:

#MyNamespace.MyApp.Vehicle.Vehicle.dcm.yml
MyNamespace\MyApp\Vehicle\Vehicle:
    type: entity
    table: vehicle_table
    inheritanceType: JOINED
    discriminatorColumn:
        name: discriminator_column
        type: string
    discriminatorMap:
        vehicle: Vehicle
        groundVehicle: MyNamespace\MyApp\Vehicle\GroundVehicle\GroundVehicle
        airVehicle: MyNamespace\MyApp\Vehicle\AirVehicle\AirVehicle
    repositoryClass: Vehicle
    id:
        id:
            type: integer
            generator:
                strategy: AUTO
    fields:
        grandParentItem1:
            type: string
        grandParentItem2:
            type: string

#MyNamespace.MyApp.Vehicle.AirVehicle.AirVehicle.dcm.yml
MyNamespace\MyApp\Vehicle\AirVehicle\AirVehicle:
    type: entity
    table: air_vehicle
    extends: MyNamespace\MyApp\Vehicle\Vehicle
    inheritanceType: JOINED
    discriminatorMap:
        airVehicle: AirVehicle
        airplane: MyNamespace\MyApp\Vehicle\AirVehicle\Airplane\Airplane
        rocket: MyNamespace\MyApp\Vehicle\AirVehicle\Rocket\Rocket
    repositoryClass: AirVehicle
    id:
        id:
            associationKey: true
    fields:
        parentItem1:
            type: string
        parentItem2:
            type: string

#MyNamespace.MyApp.Vehicle.AirVehicle.Rocket.Rocket.dcm.yml
MyNamespace\MyApp\Vehicle\AirVehicle\Rocket\Rocket:
    extends: MyNamespace\MyApp\Vehicle\AirVehicle\AirVehicle
    type: entity
    table: rocket_table
    id:
        id:
            associationKey: true
    repositoryClass: Rocket
    fields:
        childItem1:
            type: string
        childItem2:
            type: string

I haven't shown GroundVehicle or Train, Car, and Airplane, but they are almost identical to AirVehicle and Rocket, respectively.

I've discovered that the barebone entities need to be manually created prior to using orm:generate-entities else I get class not found errors, and have created them as shown below.
        
inheritance_src/MyNamespace/MyApp/Vehicle/Vehicle.php
    inheritance_src/MyNamespace/MyApp/Vehicle/AirVehicle/AirVehicle.php
        inheritance_src/MyNamespace/MyApp/Vehicle/AirVehicle/Airplane/Airplane.php
        inheritance_src/MyNamespace/MyApp/Vehicle/AirVehicle/Rocket/Rocket.php
    inheritance_src/MyNamespace/MyApp/Vehicle/GroundVehicle/GroundVehicle.php
        inheritance_src/MyNamespace/MyApp/Vehicle/GroundVehicle/Car/Car.php
        inheritance_src/MyNamespace/MyApp/Vehicle/GroundVehicle/Train/Train.php

[michael@devserver doctrine]$ find inheritance_src -name "*.php" -exec cat {} \;
<?php
namespace MyNamespace\MyApp\Vehicle\AirVehicle\Airplane;
class Airplane extends \MyNamespace\MyApp\Vehicle\AirVehicle\AirVehicle{}
<?php
namespace MyNamespace\MyApp\Vehicle\AirVehicle\Rocket;
class Rocket extends \MyNamespace\MyApp\Vehicle\AirVehicle\AirVehicle{}
<?php
namespace MyNamespace\MyApp\Vehicle\AirVehicle;
abstract class AirVehicle extends \MyNamespace\MyApp\Vehicle\Vehicle{}
<?php
namespace MyNamespace\MyApp\Vehicle\GroundVehicle\Car;
class Car extends \MyNamespace\MyApp\Vehicle\GroundVehicle\GroundVehicle{}
<?php
namespace MyNamespace\MyApp\Vehicle\GroundVehicle\Train;
class Train extends \MyNamespace\MyApp\Vehicle\GroundVehicle\GroundVehicle{}
<?php
namespace MyNamespace\MyApp\Vehicle\GroundVehicle;
abstract class GroundVehicle extends \MyNamespace\MyApp\Vehicle\Vehicle{}
<?php
namespace MyNamespace\MyApp\Vehicle;
abstract class Vehicle{}

I then am able to successfully create the entities using orm:generate-entities, schema using orm:schema-tool:create, and repositories using orm:generate-repositories.

Does everything seem correct?

A couple of issues which I have my doubts:

Locating the classes in inheritance_src/MyNamespace/MyApp instead of inheritance_src/MyApp.  I tried to do the later and modify my psr-4 autoloader to use "MyNamespace\\": "inheritance_src/", but could not get it working without first creating the entities, editing them to add the "abstract" and "extend" portions, and then moving them to one directory lower. Needing to manually create the barebone classes in the first place.  My meta-data definitions includes "extends: MyNamespace\MyApp\Vehicle\Vehicle", so I would thought it would not be necessary. Locate both the entities and repositories in the same folder.  For that matter, I will probably be locating my service in the same folder as well.  It seems that most frameworks will locate all the entities in one folder (with of course subdirectories), repositories in another, services in another, etc.  The way I am doing seems to be organized domain modules as described by https://mnapoli.fr/organizing-code-into-domain-modules/.  Any compelling reasons to do it one way or the other?

Thank you
 

Hoping to get some thoughts on how Doctrine array collections should be used when the position of the items in the collection must be controlled.

For instance, I have a Chart object which has various primitive properties as well as a series property which is an array collection.  Each member in the series collection is a Serie object which has various primitive properties as well as a data property which is an array collection.  Each member in the data collection is a Datum object which includes various primitive properties.  The following just refers to the series collection, however, will be doing the same with the data collection.

Chart will have methods to add a Serie to the end of the series collection, modify a Serie for a given position, delete a Serie for a given position, swap the position of two Serie, and retrieve all Serie(s) in their designated position order. 

To implement this, my thought is to include a integer position property in Serie, and when retrieving the results will just ORDER BY this column if using DQL or maybe will use Criteria to filter the results.  I am not, however, sure how to implement some of the other methods.

When adding a new Serie to the end of the collection, should I do something like:

class Chart
{
    public function addSerie(array $params):Chart {
        $serie=new Serie();
        $serie->setName($params['name']);
        $position=$this->series->count();
        $serie->setPosition($position);
        $this->addSeries($serie);
    }
}

Also, ArrayCollection has various methods such as offsetGet(), but how does the collection know what to be ordered by?  Maybe using something like the following? 

class Chart
{
    public function __construct() {
        $this->series->getIterator()->uasort(function ($first, $second) {
            return (int) $first->getPosition() > (int) $second->getPosition() ? 1 : -1;
        });
    }
}

    
Also, any general thoughts on this topic would be appreciated.

PS.  Originally, I was using the name "Series" instead of "Serie", but the lack of separate forms for singular and plural was messing with me.  Was thinking of using SeriesNode instead, but didn't want to need to follow this same naming convention for other items...

The following metadata...

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping https://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
  <entity name="NotionCommotion\App\Account\PublicAccountIdIncrementor" table="public_account_id_incrementor">
    <id name="account" association-key="true"/>
    <field name="chart_id" type="integer">
      <options>
        <option name="default">0</option>
      </options>
    </field>
    <field name="source_id" type="integer">
      <options>
        <option name="default">0</option>
      </options>
    </field>
    <one-to-one field="account" target-entity="NotionCommotion\App\Account\Account" fetch="LAZY" inversed-by="idPublicIncrementor">
      <join-columns>
        <join-column name="id" referenced-column-name="id" nullable="false"/>
      </join-columns>
    </one-to-one>
  </entity>
</doctrine-mapping>

<?xml version="1.0" encoding="utf-8"?>
<doctrine-mapping xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping https://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
  <entity name="NotionCommotion\App\Account\Account" table="account">
    <id name="id" type="integer"/>
    <one-to-one field="idPublicIncrementor" target-entity="NotionCommotion\App\Account\PublicAccountIdIncrementor" mapped-by="account"/>
  </entity>
</doctrine-mapping>

creates the following methods...

<?php
class Account
{
    /**
     * Set idPublicIncrementor.
     *
     * @param \NotionCommotion\App\Account\PublicAccountIdIncrementor|null $idPublicIncrementor
     *
     * @return Account
     */
    public function setIdPublicIncrementor(\NotionCommotion\App\Account\PublicAccountIdIncrementor $idPublicIncrementor = null)
    {
        $this->idPublicIncrementor = $idPublicIncrementor;

        return $this;
    }

    /**
     * Get idPublicIncrementor.
     *
     * @return \NotionCommotion\App\Account\PublicAccountIdIncrementor|null
     */
    public function getIdPublicIncrementor()
    {
        return $this->idPublicIncrementor;
    }
    
}

As seen, Account::idPublicIncrementor allows NULL value.  Is this by design since PublicAccountIdIncrementor's primary key is Account's primary key?  If not, how do I instruct Doctrine to prevent NULL?

This topic has been moved to Other Libraries and Frameworks.

http://www.phpfreaks.com/forums/index.php?topic=324009.0

I'm starting in Doctrine 2.4 and I'm developing a system where I separate the core files and application files, as follows:

/root
  |-- /Src
        |-- /App
              |-- /Model
                    |-- ** (Application Entities) **
        |-- /Core
              |-- /Model
                    |-- ** (Core Entities) **

In the Doctrine documentation shows the following form to set 1 directory for Esntitys:

$config = Setup::createAnnotationMetadataConfiguration(array(__DIR__. "/src"), $isDevMode);

But when I have to configure more than one directory that will contain the Entitys of my application, how to proceed?   Thanks in advance!

Finally getting around to giving Doctrine a try.  Looks like YAML is depreciated, so my choices are DocBlocks or XML.

I am sure it is personal choice, however, I would like to start off with what most feel is the best path.

Any recommendations?  Thanks

Anyone know why the following results in an error?  Not a big deal as memory is not an issue and I can (and have) just changed it to create a new array instead of using a generator, but still curious.  Thanks

<?php
foreach($doctrineCollection as $doctrineEntity){
    yield new MyWrapper($doctrineEntity);
    /*
    After around 4 iterations, results in the following error:
    
    syslog
    Apr 06 15:25:25 myserver.net kernel: php-fpm[42889]: segfault at 7f8156a14100 ip 000055bb1d79acfd sp 00007ffd0b50a968 error 4 in php-fpm[55bb1d47c000+46e000]

    /var/log/php-fpm/error.log
    [Mon Apr 06 20:06:38.781360 2020] [proxy_fcgi:error] [pid 1501:tid 140210423629568] (104)Connection reset by peer: [client 12.345.67.890:45574] AH01075: Error dispatching request to :

    /var/log/httpd/error_log
    [06-Apr-2020 20:04:52] WARNING: [pool michael] child 5524 exited on signal 11 (SIGSEGV) after 0.138268 seconds from start
    [06-Apr-2020 20:04:52] NOTICE: [pool michael] child 5526 started
    */
}

class MyWrapper
{
    private $doctrineEntity;

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

 

I am doing something stupid, and just can't see it and hoping someone has better eyes than mine.  I have two Doctrine entities which extend another class using single class inheritance, but when retrieving the collection of either of the two child classes, I get the collection of the parent (i.e. combination of both child classes).  I've experimented with making the parent abstract and not including it in the discriminator map but no change.  In hopes to identifying my mistake, I created a new Symfony project with just the relevant classes and show all steps below.

Initial install by running the following:

symfony new test
composer update
composer require doctrine/orm
composer require migrations
composer require maker --dev
composer require security

Using "php bin/console make:user", I created three users: AbstractUser, OwnerUser, VendorUser.  I then edited all three entities and the owner and vendor repositories as follows:

<?php

namespace App\Entity;

use App\Repository\AbstractUserRepository;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Security\Core\User\UserInterface;

/**
 * @ORM\Entity(repositoryClass=AbstractUserRepository::class)
 * @ORM\InheritanceType("SINGLE_TABLE")
 * @ORM\DiscriminatorColumn(name="discr", type="string")
 * @ORM\DiscriminatorMap({"owner" = "OwnerUser", "vendor" = "VendorUser", "abstract" = "AbstractUser"})
 */
class AbstractUser implements UserInterface
{
    // No changes made
}

 

<?php

namespace App\Entity;

use App\Repository\OwnerUserRepository;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity(repositoryClass=OwnerUserRepository::class)
 */
class OwnerUser extends AbstractUser
{
}

 

<?php

namespace App\Entity;

use App\Repository\VendorUserRepository;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity(repositoryClass=VendorUserRepository::class)
 */
class VendorUser extends AbstractUser
{
}

No change to AbstractUserRepository.

<?php

namespace App\Repository;

class OwnerUserRepository extends AbstractUserRepository
{
}

 

<?php

namespace App\Repository;

class VendorUserRepository extends AbstractUserRepository
{
}

Then I migrated the DB.

php bin/console doctrine:schema:drop --full-database --force
rm migrations/*
php bin/console make:migration
php bin/console doctrine:migrations:migrate

Next I created two OwnerUsers and one VendorUser using a command script I wrote shown at the end of this post.

# php bin/console app:tester create OwnerUser roles=[]
# php bin/console app:tester create OwnerUser roles=[]
# php bin/console app:tester create VendorUser roles=[]

Checked the PostSQL database.

facdocs=> \d
                     List of relations
 Schema |            Name             |   Type   |  Owner
--------+-----------------------------+----------+---------
 public | abstract_user               | table    | facdocs
 public | abstract_user_id_seq        | sequence | facdocs
 public | doctrine_migration_versions | table    | facdocs
(3 rows)

facdocs=> select * from abstract_user;
 id |    email    | roles |    password    | discr
----+-------------+-------+----------------+--------
  1 | setEmail158 | []    | setPassword146 | owner
  2 | setEmail87  | []    | setPassword101 | owner
  3 | setEmail62  | []    | setPassword20  | vendor
(3 rows)

facdocs=>

Next, I retrieved the entities using Doctrine along with the beforementioned test script.
 

[michael@devserver test]$ php bin/console app:tester read VendorUser
Test Entity Manager
============

command: read
entity: VendorUser
class: \App\Entity\VendorUser
properties: []
array(3) {
  [0]=>
  object(stdClass)#293 (5) {
    ["__CLASS__"]=>
    string(20) "App\Entity\OwnerUser"
    ["id:App\Entity\AbstractUser:private"]=>
    int(1)
    ["email:App\Entity\AbstractUser:private"]=>
    string(11) "setEmail158"
    ["roles:App\Entity\AbstractUser:private"]=>
    string(8) "Array(0)"
    ["password:App\Entity\AbstractUser:private"]=>
    string(14) "setPassword146"
  }
  [1]=>
  object(stdClass)#294 (5) {
    ["__CLASS__"]=>
    string(20) "App\Entity\OwnerUser"
    ["id:App\Entity\AbstractUser:private"]=>
    int(2)
    ["email:App\Entity\AbstractUser:private"]=>
    string(10) "setEmail87"
    ["roles:App\Entity\AbstractUser:private"]=>
    string(8) "Array(0)"
    ["password:App\Entity\AbstractUser:private"]=>
    string(14) "setPassword101"
  }
  [2]=>
  object(stdClass)#358 (5) {
    ["__CLASS__"]=>
    string(21) "App\Entity\VendorUser"
    ["id:App\Entity\AbstractUser:private"]=>
    int(3)
    ["email:App\Entity\AbstractUser:private"]=>
    string(10) "setEmail62"
    ["roles:App\Entity\AbstractUser:private"]=>
    string(8) "Array(0)"
    ["password:App\Entity\AbstractUser:private"]=>
    string(13) "setPassword20"
  }
}
[michael@devserver test]$
[michael@devserver test]$ php bin/console app:tester read OwnerUser
Test Entity Manager
============

command: read
entity: OwnerUser
class: \App\Entity\OwnerUser
properties: []
array(3) {
  [0]=>
  object(stdClass)#293 (5) {
    ["__CLASS__"]=>
    string(20) "App\Entity\OwnerUser"
    ["id:App\Entity\AbstractUser:private"]=>
    int(1)
    ["email:App\Entity\AbstractUser:private"]=>
    string(11) "setEmail158"
    ["roles:App\Entity\AbstractUser:private"]=>
    string(8) "Array(0)"
    ["password:App\Entity\AbstractUser:private"]=>
    string(14) "setPassword146"
  }
  [1]=>
  object(stdClass)#294 (5) {
    ["__CLASS__"]=>
    string(20) "App\Entity\OwnerUser"
    ["id:App\Entity\AbstractUser:private"]=>
    int(2)
    ["email:App\Entity\AbstractUser:private"]=>
    string(10) "setEmail87"
    ["roles:App\Entity\AbstractUser:private"]=>
    string(8) "Array(0)"
    ["password:App\Entity\AbstractUser:private"]=>
    string(14) "setPassword101"
  }
  [2]=>
  object(stdClass)#358 (5) {
    ["__CLASS__"]=>
    string(21) "App\Entity\VendorUser"
    ["id:App\Entity\AbstractUser:private"]=>
    int(3)
    ["email:App\Entity\AbstractUser:private"]=>
    string(10) "setEmail62"
    ["roles:App\Entity\AbstractUser:private"]=>
    string(8) "Array(0)"
    ["password:App\Entity\AbstractUser:private"]=>
    string(13) "setPassword20"
  }
}
[michael@devserver test]$

 

As seen, when requesting a collection of either OwnerUsers or VendorUsers, I am retrieving the combination of both collections.  I am sure it is totally user (i.e. me) error, but just don't see it.  Are you able to see my stupid mistake?  Thanks

My test script is below:
 

<?php

namespace App\Command;

use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Input\InputArgument;
use Doctrine\ORM\EntityManagerInterface;
use Doctrine\Common\Util\Debug;

class Tester extends Command
{
    // the name of the command (the part after "bin/console")
    protected static $defaultName = 'app:tester';
    private $entityManager;
    public function __construct(EntityManagerInterface $entityManager)
    {
        $this->entityManager = $entityManager;
        parent::__construct();
    }

    protected function configure()
    {
        $this
        ->setDescription('Doctrine Object Tester.  --help')
        ->setHelp('This command allows you to query a single entity...')
        ->addArgument('cmd', InputArgument::REQUIRED, 'The command name [create, read].')
        ->addArgument('entity', InputArgument::REQUIRED, 'The name of the entity.')
        ->addArgument('properties', InputArgument::IS_ARRAY | InputArgument::OPTIONAL, 'properies (foo=foo bla=[]')
        ;
    }

    private function getProperties($input)
    {
        $properties=[];
        foreach($input as $property) {
            $property=explode('=', $property);
            $name = trim($property[0]);
            $value = trim($property[1]);
            if($value === '[]') {
                $value = [];
            }
            elseif($value === 'null') {
                $value = null;
            }
            elseif(substr($value, 0, 1) === '/') {
                $value = explode('/', substr($value, 1));
                $class = ucfirst(substr($value[0], 0, -1));
                $class = '\App\Entity\\'.$class;
                if(count($value)===1) {
                    $value = $this->entityManager->getRepository($class)->findAll();
                }
                else {
                    $value = $this->entityManager->getRepository($class)->find($value[1]);
                }
            }
            $properties[$name] = $value;
        }
        return $properties;
    }

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $output->writeln([
            'Test Entity Manager',
            '============',
            '',
        ]);

        // retrieve the argument value using getArgument()

        $cmd = $input->getArgument('cmd');
        $output->writeln('command: '.$cmd);
        $entity = $input->getArgument('entity');
        $output->writeln('entity: '.$entity);
        $class = '\App\Entity\\'.$entity;
        $output->writeln('class: '.$class);
        $properties = $this->getProperties($input->getArgument('properties'));

        $output->writeln('properties: '.json_encode($properties));

        switch($cmd) {
            case 'create':
                $entity = new $class;
                foreach(get_class_methods($entity) as $method) {
                    if(substr($method, 0, 3)==='set') {
                        $m = lcfirst(substr($method, 3));
                        $entity->$method(array_key_exists($m, $properties)?$properties[$m]:$method.rand(0,200));
                    }
                }
                $this->entityManager->persist($entity);
                $this->entityManager->flush();
                $output->writeln('entity created');
                break;
            case 'read':
                Debug::dump($this->entityManager->getRepository($class)->findAll());
                break;
            default:
                $output->writeln('INVALID COMMAND: '.$cmd.'.  Only create and read are supported.'); 
        }
        return Command::SUCCESS;
    }
}

 

I am a little confused with the difference between Symfony Events and Event Listners and Doctrine Events.

The Doctrine events look pretty straight forward and are primary used for entity persistence, and I have outlined my understanding below:

Doctrine Lifecycle Callbacks. Single entity and single Doctrine event. Method in class. Good performance. Don't have access to Symfony services (all others do) Doctrine Lifecycle Listeners. All entities and single Doctrine event. Separate class and configured in config.service.yaml. Doctrine Entity Listeners. Single entities and single Doctrine event. Separate class and configured in config.service.yaml. Doctrine Lifecycle Subscribers. All entities and multiple Doctrine event. Must implement EventSubscriber (or probably EventSubscriberInterface) Separate class and configured in config.service.yaml.

I am more confused with the Symfony events and my interpretation as listed below is likely incorrect.

Symfony Event Listeners. Single Symfony event. Separate class and configured in config.service.yaml. More flexible because bundles can enable or disable each of them conditionally depending on some configuration value. Symfony Event Subscribers. All specified Symfony events. Must implement EventSubscriberInterface Separate class but NOT configured in config.service.yaml but in class. Easier to reuse because the knowledge of the events is kept in the class rather than in the service definition.

Are they used for totally different purposes or can one use Symfony events to also deal with entities?  Where would one want to use these Symfony events?

Is there a reason why Doctrine Lifecycle Subscribers are located in src/EventListener and not src/EventSubscriber

Are Doctrine Lifecycle and Entity Listeners really only for a single event as I interpret the documentation states, or is it one method per Doctrine event such as the following?

    App\EventListener\SearchIndexer:
        tags:
            -
                name: 'doctrine.event_listener'
                event: 'postPersist'
            -
                name: 'doctrine.event_listener'
                event: 'postUpdate'

 

I have mysqli object in Database class base:

[color=]database class:[/color]

class Database {
  private $dbLink = null;
  
  public function __construct() {
    if (is_null($this->dbLink)) {
      // load db information  to connect
      $init_array = parse_ini_file("../init.ini.inc", true);
      $this->dbLink = new mysqli($init_array['database']['host'],
                           $init_array['database']['usr'],
                           $init_array['database']['pwd'],
                           $init_array['database']['db']);
  
      if (mysqli_connect_errno()) {
        $this->dbLink = null;
      }
    }
  }

  public function __destruct() {
    $this->dbLink->close();
  }
}


Class derived is Articles where I use object dBLink in base (or parent) class and I can't access to mysqli methods (dbLink member of base class):

Articles class:

require_once ('./includes/db.inc');

class Articles extends Database{
  private $id,
              ....
              ....
             $visible = null;
  
  public function __construct() {
    // Set date as 2009-07-08 07:35:00
    $this->lastUpdDate = date('Y-m-d H:i:s');
    $this->creationDate = date('Y-m-d H:i:s');
  }
  
  // Setter
  ....
  ....

  // Getter
  ....
  ....

  public function getArticlesByPosition($numArticles) {
    if ($result = $this->dbLink->query('SELECT * FROM articles ORDER BY position LIMIT '.$numArticles)) {
      $i = 0;
      while ($ret = $result->fetch_array(MYSQLI_ASSOC)) {
        $arts[$i] = $ret;
      }
      $result->close();
      return $arts;
    }
  }
}


In my front page php I use article class:


include_once('./includes/articles.inc');
$articlesObj = new articles();
$articles = $articlesObj->getArticlesByPosition(1);
var_dump($articles);


[color=]Error that go out is follow[/color]

Notice: Undefined property: Articles::$dbLink in articles.inc  on line 89

Fatal error: Call to a member function query() on a non-object in articles.inc on line 89

If I remove constructor on derived class Articles result don't change 
Please help me

If a class has a constructor but also has a static method, if I call the static method does the constructor run so that I can use an output from the constructor in my static method?

--Kenoli

Hi

Can you call Class A's methods or properties from Class B's methods?

Thanks.

Ok. I know you can pass the object of a class as an argument. Example:


class A {
    function test() {
        echo "This is TEST from class A";
    }
}


class B {
    function __construct( $obj ) {
        $this->a = $obj;
    }

    function test() {
       $this->a->test();
    }

}


Then you could do:

$a = new A();
$b = new B($a);


Ok so that's one way i know of.

I also thought that you could make a method static, and do this: (assuming class A's test is 'static')

class B {
    function test() {
       A::test(); 
   }
}


But that is not working.


I'd like to know all possible ways of accomplishing this. Any hints are appreciated. thanks