我正在尝试设置加权标签云,当标签是博客实体中的字符串属性时,该标签云有效。
现在我将标签设置为自己的实体,并与博客相关,作为双向ManyToMany / ManyToMany关系。
毋庸置疑,它不起作用,我猜它是因为标签现在是它自己的对象。
我的问题:由于标签是自己的实体而不是来自博客实体的字符串属性,我在这里做错了什么?
当我从下面的控制器转储$ tagWeights时,我会看到类似这样的内容时出错:
array (size=78)
'Tag1' => float 1
'Tag2' => float 5
'Tag3' => float 2
错误:(这一行:
foreach ($tags as $tag) {
$tagWeights[$tag] = (isset($tagWeights[$tag])) ? $tagWeights[$tag] + 1 : 1;
}
ContextErrorException:警告:isvar中的非法偏移类型或/var /www/html/Satori/src/Symfony/AcmeBundle/Entity/TagRepository.php第34行中的空白
我在树枝上用以下方式调用标签:
枝条
{% for tag, weight in tags %}
<span class="weight-{{ weight }}"><a href="">{{ tag }}</a></span>
{% else %}
<p>There are no tags</p>
{% endfor %}
控制器(转储$ tags可以很好地显示所有标签)
public function footerAction()
{
$em = $this->getDoctrine()->getManager();
$tags = $em->getRepository('AcmeBundle:Tag')
->getTags();
$tagWeights = $em->getRepository('AcmeBundle:Tag')
->getTagWeights($tags);
var_dump($tagWeights); die();
return array(
'tags' => $tagWeights,
);
}
这是getTags和getTagWeights:
public function getTags()
{
$tags = $this->createQueryBuilder('t')
->select('t.tag')
->getQuery()
->getResult();
return $tags;
}
public function getTagWeights($tags)
{
$tagWeights = array();
if (empty($tags))
return $tagWeights;
foreach ($tags as $tag)
{
$tagWeights[$tag] = (isset($tagWeights[$tag['tag']])) ? $tagWeights[$tag] + 1 : 1;
}
// Shuffle the tags
uksort($tagWeights, function() {
return rand() > rand();
});
$max = max($tagWeights);
// Max of 5 weights
$multiplier = ($max > 5) ? 5 / $max : 1;
foreach ($tagWeights as &$tag)
{
$tag = ceil($tag * $multiplier);
}
return $tagWeights;
}
标记实体
class Tag
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string
*
* @ORM\Column(name="tag", type="string", length=255)
*/
private $tag;
/**
* @ORM\ManyToMany(targetEntity="Blog", mappedBy="tags")
*/
protected $blogs;
public function __construct()
{
$this->blogs = new ArrayCollection();
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set tag
*
* @param string $tag
* @return Tag
*/
public function setTag($tag)
{
$this->tag = $tag;
return $this;
}
/**
* Get tag
*
* @return string
*/
public function getTag()
{
return $this->tag;
}
/**
* Add blogs
*
* @param \AcmeBundle\Entity\Blog $blogs
* @return Tag
*/
public function addBlog(\AcmeBundle\Entity\Blog $blogs)
{
$this->blogs[] = $blogs;
return $this;
}
/**
* Remove blogs
*
* @param \AcmeBundle\Entity\Blog $blogs
*/
public function removeBlog(\AcmeBundle\Entity\Blog $blogs)
{
$this->blogs->removeElement($blogs);
}
/**
* Get blogs
*
* @return \Doctrine\Common\Collections\Collection
*/
public function getBlogs()
{
return $this->blogs;
}
}
提出的解决方案和结果
使用(isset($tagWeights[$tag['tag']]))
错误:
ContextErrorException:警告:/var/www/html/Satori/src/Symfony/AcmeBundle/Entity/TagRepository.php第34行中的非法偏移类型
使用(isset($tagWeights[$tag[$tag->getTag()]))
错误:
ContextErrorException:注意:尝试在/var/www/html/Satori/src/Symfony/AcmeBundle/Entity/TagRepository.php第34行获取非对象的属性
答案 0 :(得分:0)
我想我知道这里发生了什么......
当您在footerAction
:
$tags = $em->getRepository('AcmeBundle:Tag')
->getTags();
您的存储库会返回一个数组数组。所以当你说:
isset($tagWeights[$tag])
... $tag
实际上是结果集的关联数组。我想你在这里说的是:
isset($tagWeights[$tag['tag']])
那就是说,我建议不要给你的Tag
实体一个名为tag
的财产。标签没有标签,它有名称或描述。而且这里说得更有意义
isset($tagWeights[$tag['name']])
...或者让存储库返回Tag
实体本身(为什么你甚至需要覆盖内置的getXyz()
方法?),然后执行:
isset($tagWeights[$tag->getName()])