Question

I have two tables. First table is users and second is datas. Datas has useridx column which is foreign with user‘s idx. (primary unique key).

These are the table structures:

Table users

CREATE TABLE public.users (
  idx       bigint NOT NULL,
  "name"    varchar(250) DEFAULT NULL::character varying,
  surname   varchar(250) DEFAULT NULL::character varying,
  isactive  boolean NOT NULL DEFAULT false,
  /* Keys */
  CONSTRAINT users_pkey
    PRIMARY KEY (idx), 
  CONSTRAINT users_idx_key
    UNIQUE (idx)
) WITH (
    OIDS = FALSE
  );

Table datas:

CREATE TABLE public.datas (
  idx       bigint NOT NULL,
  useridx   bigint,
  phrase    varchar(100) DEFAULT NULL::character varying,
  response  varchar(100) DEFAULT NULL::character varying,
  /* Keys */
  CONSTRAINT datas_pkey
    PRIMARY KEY (idx), 
  CONSTRAINT datas_idx_key
    UNIQUE (idx),
  /* Foreign keys */
  CONSTRAINT fk_cf180c1a262768b5
    FOREIGN KEY (useridx)
    REFERENCES public.users(idx)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION
) WITH (
    OIDS = FALSE
  );

Now when i run these commands:

app/console doctrine:mapping:convert yml
./src/Acme/DemoBundle/Resources/config/doctrine/metadata/orm
--from-database
--force

And;

app/console doctrine:mapping:import AcmeDemoBundle annotation
app/console doctrine:generate:entities AcmeDemoBundle

I got this result:

Datas.php

namespace Acme\DemoBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Acme\DemoBundle\Entity\Datas
 *
 * @ORM\Table(name="datas")
 * @ORM\Entity
 */
class Datas
{
    /**
     * @var bigint $idx
     *
     * @ORM\Column(name="idx", type="bigint", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="SEQUENCE")
     * @ORM\SequenceGenerator(sequenceName="datas_idx_seq", allocationSize="1", initialValue="1")
     */
    private $idx;

    /**
     * @var string $phrase
     *
     * @ORM\Column(name="phrase", type="string", length=100, nullable=true)
     */
    private $phrase;

    /**
     * @var string $response
     *
     * @ORM\Column(name="response", type="string", length=100, nullable=true)
     */
    private $response;

    /**
     * @var Users
     *
     * @ORM\ManyToOne(targetEntity="Users")
     * @ORM\JoinColumns({
     *   @ORM\JoinColumn(name="useridx", referencedColumnName="idx")
     * })
     */
    private $useridx;



    /**
     * Get idx
     *
     * @return bigint 
     */
    public function getIdx()
    {
        return $this->idx;
    }

    /**
     * Set phrase
     *
     * @param string $phrase
     */
    public function setPhrase($phrase)
    {
        $this->phrase = $phrase;
    }

    /**
     * Get phrase
     *
     * @return string 
     */
    public function getPhrase()
    {
        return $this->phrase;
    }

    /**
     * Set response
     *
     * @param string $response
     */
    public function setResponse($response)
    {
        $this->response = $response;
    }

    /**
     * Get response
     *
     * @return string 
     */
    public function getResponse()
    {
        return $this->response;
    }

    /**
     * Set useridx
     *
     * @param Acme\DemoBundle\Entity\Users $useridx
     */
    public function setUseridx(\Acme\DemoBundle\Entity\Users $useridx)
    {
        $this->useridx = $useridx;
    }

    /**
     * Get useridx
     *
     * @return Acme\DemoBundle\Entity\Users 
     */
    public function getUseridx()
    {
        return $this->useridx;
    }
}
?>

Users.php

<?php

namespace Acme\DemoBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
/**
 * Acme\DemoBundle\Entity\Users
 *
 * @ORM\Table(name="users")
 * @ORM\Entity
 */
class Users
{
    /**
     * @var bigint $idx
     *
     * @ORM\Column(name="idx", type="bigint", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="SEQUENCE")
     * @ORM\SequenceGenerator(sequenceName="users_idx_seq", allocationSize="1", initialValue="1")
     */
    private $idx;

    /**
     * @var string $name
     *
     * @ORM\Column(name="name", type="string", length=250, nullable=true)
     */
    private $name;

    /**
     * @var string $surname
     *
     * @ORM\Column(name="surname", type="string", length=250, nullable=true)
     */
    private $surname;

    /**
     * @var boolean $isactive
     *
     * @ORM\Column(name="isactive", type="boolean", nullable=false)
     */
    private $isactive;

    /**
     * Get idx
     *
     * @return bigint 
     */
    public function getIdx()
    {
        return $this->idx;
    }

    /**
     * Set name
     *
     * @param string $name
     */
    public function setName($name)
    {
        $this->name = $name;
    }

    /**
     * Get name
     *
     * @return string 
     */
    public function getName()
    {
        return $this->name;
    }

    /**
     * Set surname
     *
     * @param string $surname
     */
    public function setSurname($surname)
    {
        $this->surname = $surname;
    }

    /**
     * Get surname
     *
     * @return string 
     */
    public function getSurname()
    {
        return $this->surname;
    }

    /**
     * Set isactive
     *
     * @param boolean $isactive
     */
    public function setIsactive($isactive)
    {
        $this->isactive = $isactive;
    }

    /**
     * Get isactive
     *
     * @return boolean 
     */
    public function getIsactive()
    {
        return $this->isactive;
    }
}
?>

I also have yml files but i dont think they are necessary in here only PHP files i posted here.

Now, when i run this command inside of my controller:

<?php

$user = $this->getDoctrine()
->getRepository('AcmeDemoBundle:Users')
->find(24);

$phrase = $user->getDatas()->getPhrase();

?>

I got an error that say Call to a member function getDatas() on a non-object.... I know it is clear. In Users.php i don’t have getDatas().

But what i read from Symfony2 and Doctrine documentation is it should be there because they are related. All i want to do is get Datas inside of Users.

What is my mistake here? What im missing?

Update:
I added this lines to the Users.php

<?php
/**
     * @var \Acme\DemoBundle\Entity\Datas
     *
     * @ORM\OneToMany(targetEntity="Datas", mappedBy="datas", cascade={"all"})
     */
     private $datas;
public function __construct()
    {
        $this->datas = new \Doctrine\Common\Collections\ArrayCollection();
    }

    /**
     * Add phrases
     *
     * @param Acme\DemoBundle\Entity\Datas $datas
     */
    public function addPhrases(\Acme\DemoBundle\Entity\Datas $datas)
    {
        $this->datas[] = $datas;
    }

    /**
     * Get datas
     *
     * @return Doctrine\Common\Collections\Collection 
     */
    public function getDatas()
    {
        return $this->datas;
    }
?>

And these lines to the Datas.php

<?php
/**
     * @ORM\ManyToOne(targetEntity="Users", inversedBy="users", cascade={"all"})
     */
    protected $users;
/**
     * Set users
     *
     * @param Acme\DemoBundle\Entity\Users $users
     */
    public function setUsers(\Acme\DemoBundle\Entity\Users $users)
    {
        $this->users = $users;
    }

    /**
     * Get users
     *
     * @return Acme\DemoBundle\Entity\Users 
     */
    public function getUsers()
    {
        return $this->users;
    }
?>

Now getDatas() is working but inside of it is not. ($user->getDatas()->getPhrase();)
I am getting this error:

Call to undefined method Doctrine\ORM\PersistentCollection::getPhrase()

Conclusion: I got collection error because it returns a collection -of course-. Iterate (like foreach) it and you will access the data. (If you encounter a problem like this.)

Answer 1

If look at the documentation of @JoinColumn

This annotation is used in the context of relations in @ManyToOne, @OneToOne fields and in the Context of @JoinTable nested inside a @ManyToMany. This annotation is not required. If its not specified the attributes name and referencedColumnName are inferred from the table and primary key names.

So as you are using ManyToOne relation your relation definition would be,

/**
 * @var Users
 *
 * @ORM\ManyToOne(targetEntity="Users")
 * @ORM\JoinColumn(name="useridx", referencedColumnName="idx")
 */
private $useridx;

Edit:

If you want to get datas from user side then you have to create OneToMany relation. e.g

In Datas.php

/**
 * @var Users
 *
 * @ORM\ManyToOne(targetEntity="Users", inversedBy = "datas")
 * @ORM\JoinColumn(name="useridx", referencedColumnName="idx")
 */
private $useridx;

And in Users.php add following line,

/**
 * @ORM\OneToMany(targetEntity="Datas", mappedBy="useridx", cascade={"persist"})
 */
protected $datas;

And then do a doctrine:generate:entities command. To do operations on relation check this doc entry.