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PODoctrine 2 One-To-Many retrieving many side returns an empty collection
 

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  1. PODoctrine 2 One-To-Many retrieving many side returns an empty collection
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    <p>I am working on a project that utilizes Zend Framework 1.12 integrated with doctrine 2. I am having trouble with a Bidirectional One-to-Many relation in said project. The two entities concerning my problem are Team and Player; a team can have many players.</p> <p>The Team Entity:</p> <pre><code>namespace Entities; use Doctrine\Common\Collections\Collection, Doctrine\Common\Collections\ArrayCollection; /** * @Entity(repositoryClass="Repositories\TeamRepository") * @Table(name="team") */ class Team extends Entity{ /** * @Column(type="string", length=255) */ protected $name; /** * @OneToMany(targetEntity="Player", mappedBy="team") */ protected $players; public function __construct() { $this-&gt;players = new ArrayCollection(); } public function getName(){ return $this-&gt;name; } public function setName($name) { $this-&gt;name = $name; return $this; } public function getPlayers() { return $this-&gt;players; } </code></pre> <p>And the Player Entity:</p> <pre><code>namespace Entities; /** * @Entity(repositoryClass="Repositories\PlayerRepository") * @Table(name="player") */ class Player extends Entity{ public function __construct() { } /** * @Column(type="string", length=255) */ protected $name; /** * @ManyToOne(targetEntity="Team", inversedBy="players") * @JoinColumn(name="team_id", referencedColumnName="id") */ protected $team; public function getName(){ return $this-&gt;name; } public function setName($name) { $this-&gt;name = $name; return $this; } public function getTeam() { return $this-&gt;team; } public function setTeam($team) { $this-&gt;team = $team; return $this; } } </code></pre> <p>Now in my player controller for example I can retrieve a player and get the team name</p> <pre><code>$oPlayer = $this-&gt;_em-&gt;find('Entities\Player', $player_id); $teamname = $oPlayer-&gt;getTeam()-&gt;getName(); </code></pre> <p>This works as expected and I successfully obtain the name of the players team. However the other way around does not work. I can not retrieve all the players given a team</p> <pre><code>$oTeam = $this-&gt;_em-&gt;find('Entities\Team', $team_id); $oPlayers = $oTeam-&gt;getPlayers(); </code></pre> <p>When I var_dump this the result looks like</p> <pre><code>object(Doctrine\ORM\PersistentCollection)#238 (9) { ["snapshot":"Doctrine\ORM\PersistentCollection":private]=&gt; array(0) { } ["owner":"Doctrine\ORM\PersistentCollection":private]=&gt; object(Entities\Team)#195 (7) { ... } </code></pre> <p>Note that a persistenCollection seems to be build, however the array is empty. I have read the doctrine manual extensively and googled my behind off and am now at a loss.</p> <p>Also the fact that there is no error message, I am having a hard time solving this problem. Any pointers would be more than welcome.</p>
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
    1. USPankrates
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    1. This table or related slice is empty.
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      1. PODoctrine 2 One-To-Many retrieving many side returns an empty collection
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    1. COVery strange, most because the `$team` field of `Player` entity seems populated, and your implementation is [canonical](http://docs.doctrine-project.org/en/2.1/reference/association-mapping.html). Try to provide the `setPlayers()` method, just to make a `var_dump` of collection being passed, if any.
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      1. USmoonwave99
    2. COUse `\Doctrine\Common\Util\Debug::dump();` instead of `var_dump()`
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      1. PODoctrine 2 One-To-Many retrieving many side returns an empty collection
      1. USKeyne Viana
    3. COJust for my reference, what is the definition of canonical? Could not find it in the link. I tried defining the setter does not seem to make a difference. @Keyne I tried the debug dump and the result is 'string(4) "team"' , this looks like it might be a usefull hint?
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      1. USPankrates
 

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