PHP Laravel App使用数据透视表具有多对多关系

Question

I am building a Bookmarking app with PHP's Laravel framework and would like to generate some Pivot Tables in Laravels ORM.

My Database has these tables which need relations with each other:

• Users
• Bookmarks
• Bookmark_tag_lists
• Bookmark_tags

Can someone help define what methods I would need to add to each of these Models and tables to create for the Pivot table creations and functionality described below?

---

SQL Queries I will need to be able to get records with these calls:

Related to User

• get all bookmark_tag_lists that belong to a user ID
• get all bookmark_tags that belong to a user id
• get all bookmarks that belong to a user id

Related to bookmark_tag_lists

• get all bookmark_tags that belong to a bookmark_tag_lists id

Related to bookmark_tags

• get all bookmarks that belong to a bookmark_tag id

---

users

• has many bookmarks
• has many bookmark_tags
• has many bookmark_tag_lists

bookmarks

• belong to a user
• belong to many bookmark_tags

bookmark_tags

• has many bookmarks
• related to an id column on a users table
• related to an id column on a bookmarks table
• related to an id column on a bookmark_tag_lists table

bookmark_tag_lists

• has many bookmark_tags

*

Answer 1

User model:

public function bookmarks() {
    return $this->hasMany(Bookmark::class);
}

public function bookmarkTags() {
    return $this->hasMany(BookmarkTag::class);
}

public function bookmarkTagLists() {
    $bookmarkTags = $this->bookmarkTags;
    $bookmarkTagLists = array();
    foreach ($bookmarkTags as $bookmarkTag) {
        $bookmarkTagLists[] = $bookmarkTag->bookmarkTagList;
    }
    return array_unique($bookmarkTagLists);
}

Bookmark model:

public function user() {
    return belongsTo(User::class);
}

public function bookmarkTags() {
    return bolongsToMany(BookmarkTag::class);
}

public function tags() {
    return hasMany(BookmarkTag::class);
} 

BookmarkTag model:

public function bookmarks() {
    return belongsToMany(Bookmark::class);
}

public function user() {
    return belongsTo(User::class);
}

public function bookmarkTagList() {
    return $this->belongsTo(BookmarkTagList::class);
}

BookmarkTagList model:

public function bookmarkTags() {
    return hasMany(BookmarkTag::class);
}