Doctrine 2 - Error Persisting Subclass of Class Table Inheritance Mapping Strategy - php

Question

I've implement Class Table Inheritance using Doctrine 2 in my Symfony 3 project, so as to have one base profile table, that houses both employee and company profiles.
When trying to persist a sub class (EmployeeProfile) of the mapped super class (AbstractProfile), I get the following error:
An exception occurred while executing 'INSERT INTO profile (id) VALUES
(?)' with params [27, 10, 85, \"employee\"]:\n\nSQLSTATE[HY093]:
Invalid parameter number: number of bound variables does not match
number of tokens
I'm not entirely sure what's going wrong, and why Doctrine is generating a query that's entirely ignoring the AbstractProfile's properties. Initially I thought it was due to said properties not being visible to the children, but even after setting the properties to protected, the error remains.
How exactly can I fix this, or am I trying to fit a square peg into a round hole by not using this functionality for what is was intended?
profile DB Table:
+------------+--------------+------+-----+-------------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+-------------------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| user_id | int(11) | NO | | NULL | |
| type | varchar(100) | NO | | NULL | |
| status | int(11) | NO | | NULL | |
| created_at | datetime | NO | | CURRENT_TIMESTAMP | |
| updated_at | datetime | NO | | CURRENT_TIMESTAMP | |
+------------+--------------+------+-----+-------------------+----------------+
AbstractProfile Super Class:
/**
* AbstractProfile
*
* #ORM\Table(name="profile")
* #ORM\Entity(repositoryClass="ProfileBundle\Repository\ProfileRepository")
* #ORM\InheritanceType("JOINED")
* #ORM\DiscriminatorColumn(name="type", type="string")
* #ORM\DiscriminatorMap({
* "employee" = "EmployeeProfile",
* "company" = "CompanyProfile"
* })
*/
abstract class AbstractProfile
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #var int
*
* #ORM\Column(name="status", type="integer")
*/
protected $status;
/**
* #ORM\OneToOne(targetEntity="User", inversedBy="profile")
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
*/
protected $user;
//... Getters, setters and all the rest
}
EmployeeProfile Sub Entity:
<?php
/**
* EmployeeProfile
*
* #ORM\Table(name="profile")
* #ORM\Entity
*/
class EmployeeProfile extends AbstractProfile
{
/**
* #var ArrayCollection
*
* #ORM\ManyToMany(targetEntity="Skill", inversedBy="profiles")
* #ORM\JoinTable(name="profile_skills",
* joinColumns={#ORM\JoinColumn(name="profile_id", referencedColumnName="id")},
* inverseJoinColumns={#ORM\JoinColumn(name="skill_id", referencedColumnName="id", unique=true)}
* )
*/
private $skills;
public function __construct()
{
$this->skills = new ArrayCollection();
}
//... Getters, setters and all the rest
}
CompanyProfile Sub Entity:
<?php
/**
* CompanyProfile
*
* #ORM\Table(name="profile")
* #ORM\Entity
*/
class CompanyProfile extends AbstractProfile
{
/**
* #var ArrayCollection
*
* #ORM\ManyToMany(targetEntity="Event", inversedBy="profiles")
* #ORM\JoinTable(name="profile_events",
* joinColumns={#ORM\JoinColumn(name="profile_id", referencedColumnName="id")},
* inverseJoinColumns={#ORM\JoinColumn(name="event_id", referencedColumnName="id", unique=true)}
* )
*/
private $events;
public function __construct()
{
$this->events = new ArrayCollection();
}
//... Getters, setters and all the rest
}

Answer 1

It looks like you are trying to use #ORM\InheritanceType("JOINED") with a single table. You use #ORM\Table(name="profile") in your 3 entities.
The result is that Doctrine don't know what to do with your entities.
You could try replacing #ORM\InheritanceType("JOINED") by #ORM\InheritanceType("SINGLE_TABLE").