Speak now
Please Wait Image Converting Into Text...
Embark on a journey of knowledge! Take the quiz and earn valuable credits.
Challenge yourself and boost your learning! Start the quiz now to earn credits.
Unlock your potential! Begin the quiz, answer questions, and accumulate credits along the way.
General Tech Bugs & Fixes 2 years ago
Posted on 28 Aug 2022, this text provides information on Bugs & Fixes related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
Turn Your Knowledge into Earnings.
Using Symfony 4 / Doctrine 2.6. I have two entities Post and Comment. I want both to be taggable. So I create an entity Tag. I use Doctrine's class table inheritance to create the relationship:
/** * @ORM\Entity(repositoryClass="App\Repository\TagRepository") * @ORM\InheritanceType("JOINED") * @ORM\DiscriminatorColumn(name="type", type="string") * @ORM\DiscriminatorMap({"post" = "PostTag", "comment" = "CommentTag"}) */ abstract class Tag { /** * @ORM\Id() * @ORM\GeneratedValue() * @ORM\Column(type="integer") */ private $id; /** * @ORM\Column(type="string", length=255) */ private $title; // Getters and setters... } /** @ORM\Entity */ class PostTag extends Tag { /** * @ORM\ManyToOne(targetEntity="App\Entity\Post", inversedBy="tags") */ private $post; public function getPost(): ?Post { return $this->post; } } /** @ORM\Entity */ class CommentTag extends Tag { /** * @ORM\ManyToOne(targetEntity="App\Entity\Comment", inversedBy="comments") */ private $comment; public function getComment(): ?Comment { return $this->comment; } }
This creates 3 tables: tag, post_tag, and comment_tag. The post_tag table structure looks like this:
tag
post_tag
comment_tag
id | post_id
The tag table structure looks like this:
id | title | type
How are e.g. posts and tags associated? If I want to associate post 13 with tag test, would the result be this:
13
test
post_tag table:
id | post_id ------------ 1 | 13
tag table:
id | title | type ----------------- 1 | test | post
?
If so, then what if I want to associate the same tag (test) with a comment. Would the tag table then look like this?
id | title | type -------------------- 1 | test | post 2 | test | comment
That seems a bit redundant. The same entity (the test tag) is then represented by 2 rows in the tag table. Am I getting this wrong?
No matter what stage you're at in your education or career, TuteeHub will help you reach the next level that you're aiming for. Simply,Choose a subject/topic and get started in self-paced practice sessions to improve your knowledge and scores.
General Tech 10 Answers
General Tech 7 Answers
General Tech 3 Answers
General Tech 9 Answers
General Tech 2 Answers
Ready to take your education and career to the next level? Register today and join our growing community of learners and professionals.