How do i solve Semantical error: "Class has no association named.." - php

Question

i am following part 5 of the symblog symfony2 tutorial:
http://tutorial.symblog.co.uk/docs/customising-the-view-more-with-twig.html
under heading: The Homepage - Blogs and Comments
when i get to update:
// src/Blogger/BlogBundle/Repository/BlogRepositoy.php
public function getLatestBlogs($limit = null)
{
$qb = $this->createQueryBuilder('b')
->select('b, c')
->leftJoin('b.comments', 'c')
->addOrderBy('b.created', 'DESC');
if (false === is_null($limit))
$qb->setMaxResults($limit);
return $qb->getQuery()
->getResult();
}
and also when i update:
{# src/Blogger/BlogBundle/Resources/views/Page/index.html.twig #}
{# .. #}
<footer class="meta">
<p>Comments: {{ blog.comments|length }}</p>
<p>Posted by <span class="highlight">{{ blog.author }}</span> at {{ blog.created|date('h:iA') }}</p>
<p>Tags: <span class="highlight">{{ blog.tags }}</span></p>
</footer>
{# .. #}
i then refresh my browser and get error:
[Semantical Error] line 0, col 71 near 'c ORDER BY b.created': Error: Class
Blogger\BlogBundle\Entity\Blog has no association named comments
500 Internal Server Error - QueryException
<?php
// src/Blogger/BlogBundle/Entity/Blog.php
namespace Blogger\BlogBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* #ORM\Entity(repositoryClass="Blogger\BlogBundle\Repository\BlogRepository")
* #ORM\Table(name="blog")
* #ORM\HasLifecycleCallbacks()
*/
class Blog
{
public function __toString()
{
return $this->getTitle();
}
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\Column(type="string")
*/
protected $title;
/**
* #ORM\Column(type="string", length=100)
*/
protected $author;
/**
* #ORM\Column(type="text")
*/
protected $blog;
/**
* #ORM\Column(type="string", length="20")
*/
protected $image;
/**
* #ORM\Column(type="text")
*/
protected $tags;
protected $comments;
/**
* #ORM\Column(type="datetime")
*/
protected $created;
/**
* #ORM\Column(type="datetime")
*/
protected $updated;
public function __construct()
{
$this->comments = new ArrayCollection();
$this->setCreated(new \DateTime());
$this->setUpdated(new \DateTime());
}
public function setUpdatedValue()
{
$this->setUpdated(new \DateTime());
}
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set title
*
* #param string $title
*/
public function setTitle($title)
{
$this->title = $title;
}
/**
* Get title
*
* #return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set author
*
* #param string $author
*/
public function setAuthor($author)
{
$this->author = $author;
}
/**
* Get author
*
* #return string
*/
public function getAuthor()
{
return $this->author;
}
/**
* Set blog
*
* #param text $blog
*/
public function setBlog($blog)
{
$this->blog = $blog;
}
/**
* Get blog
*
* #return text
*/
public function getBlog($length = null)
{
if (false === is_null($length) && $length > 0)
return substr($this->blog, 0, $length);
else
return $this->blog;
}
/**
* Set image
*
* #param string $image
*/
public function setImage($image)
{
$this->image = $image;
}
/**
* Get image
*
* #return string
*/
public function getImage()
{
return $this->image;
}
/**
* Set tags
*
* #param text $tags
*/
public function setTags($tags)
{
$this->tags = $tags;
}
/**
* Get tags
*
* #return text
*/
public function getTags()
{
return $this->tags;
}
/**
* Set created
*
* #param datetime $created
*/
public function setCreated($created)
{
$this->created = $created;
}
/**
* Get created
*
* #return datetime
*/
public function getCreated()
{
return $this->created;
}
/**
* Set updated
*
* #param datetime $updated
*/
public function setUpdated($updated)
{
$this->updated = $updated;
}
/**
* Get updated
*
* #return datetime
*/
public function getUpdated()
{
return $this->updated;
}
}
please help solve this. i dont know where i went wrong
thanks

Answer 1

You didn't paste the src/Blogger/BlogBundle/Entity/Blog.php file. It would help resolving your issue.
Most probably you didn't add comments field to your entity (or didn't annotate it properly).
Similar problem: Doctrine2: What is wrong with the association between these entities?
EDIT: Now when you pasted your entity I can see the comments field is not annotated. Doctrine's entity manager doesn't know anything about it. You have to provide mapping (in your case via annotations).
EDIT 2:
In your entity you should have (src/Blogger/BlogBundle/Entity/Blog.php):
/**
* #ORM\OneToMany(targetEntity="Comment", mappedBy="blog")
*/
protected $comments;
but you have:
protected $comments;
Mapping is missing. Doctrine doesn't know how to use your field.

Answer 2

I have also followed the symblog tutorial. My blog.php file is as follows:
<?php
namespace Blogger\BlogBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;
/**
* Blogger\BlogBundle\Entity\Blog
*/
class Blog
{
/**
* #var integer $id
*/
private $id;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* #var string $title
*/
private $title;
/**
* #var string $author
*/
private $author;
/**
* #var string $blog
*/
private $blog;
/**
* #var string $image
*/
private $image;
/**
* #var string $tags
*/
private $tags;
/**
* #var string $comment
*/
private $comment;
/**
* #var datetime $created
*/
private $created;
/**
* #var datetime $updated
*/
private $updated;
public function __construct()
{
$this->comments = new ArrayCollection();
$this->setCreated(new \DateTime());
$this->setUpdated(new \DateTime());
}
/**
* Set title
*
* #param string $title
*/
public function setTitle($title)
{
$this->title = $title;
$this->setSlug($this->title);
}
/**
* Get title
*
* #return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set author
*
* #param string $author
*/
public function setAuthor($author)
{
$this->author = $author;
}
/**
* Get author
*
* #return string
*/
public function getAuthor()
{
return $this->author;
}
/**
* Set blog
*
* #param string $blog
*/
public function setBlog($blog)
{
$this->blog = $blog;
}
/**
* Get blog
*
* #return string
*/
public function getBlog($length = null)
{
if (false === is_null($length) && $length > 0)
return substr($this->blog, 0, $length);
else
return $this->blog;
}
/**
* Set image
*
* #param string $image
*/
public function setImage($image)
{
$this->image = $image;
}
/**
* Get image
*
* #return string
*/
public function getImage()
{
return $this->image;
}
/**
* Set tags
*
* #param string $tags
*/
public function setTags($tags)
{
$this->tags = $tags;
}
/**
* Get tags
*
* #return string
*/
public function getTags()
{
return $this->tags;
}
/**
* Set comment
*
* #param string $comment
*/
public function setComment($comment)
{
$this->comment = $comment;
}
/**
* Get comment
*
* #return string
*/
public function getComment()
{
return $this->comment;
}
/**
* Set created
*
* #param datetime $created
*/
public function setCreated($created)
{
$this->created = $created;
}
/**
* Get created
*
* #return datetime
*/
public function getCreated()
{
return $this->created;
}
/**
* Set updated
*
* #param datetime $updated
*/
public function setUpdated($updated)
{
$this->updated = $updated;
}
/**
* Get updated
*
* #return datetime
*/
public function getUpdated()
{
return $this->updated;
}
public function addComment(Comment $comment)
{
$this->comments[] = $comment;
}
public function getComments()
{
return $this->comments;
}
/**
* #ORM\preUpdate
*/
public function setUpdatedValue()
{
$this->setUpdated(new \DateTime());
}
/**
* #var Blogger\BlogBundle\Entity\Comment
*/
private $comments;
public function __toString()
{
return $this->getTitle();
}
/**
* #var string $slug
*/
protected $slug;
/**
* Set slug
*
* #param string $slug
*/
public function setSlug($slug)
{
$this->slug = $this->slugify($slug);
}
/**
* Get slug
*
* #return string
*/
public function getSlug()
{
return $this->slug;
}
public function slugify($text)
{
$text = preg_replace('#[^\\pL\d]+#u', '-', $text);
$text = trim($text, '-');
if (function_exists('iconv'))
{
$text = iconv('utf-8', 'us-ascii//TRANSLIT', $text);
}
$text = strtolower($text);
$text = preg_replace('#[^-\w]+#', '', $text);
if (empty($text))
{
return 'n-a';
}
return $text;
} }
Hope this helps you.
Your code is missing
/**
* #var Blogger\BlogBundle\Entity\Comment
*/
private $comments;