我希望通过标签获取当前帖子的相关帖子,但老实说我无法得到它。
我会告诉你我的桌子结构。
帖子表:
public function up()
{
Schema::create('posts', function (Blueprint $table) {
$table->increments('id');
$table->integer('user_id')->unsigned();
$table->string('title');
$table->string('slug')->unique();
$table->text('body');
$table->text('excerpt')->nullable();
$table->string('stickers')->nullable();
$table->integer('category_id')->nullable()->unsigned();
$table->text('meta_description')->nullable();
$table->text('meta_keywords')->nullable();
$table->string('postimg')->nullable();
$table->string('type')->nullable()->default('common');
$table->boolean('published')->default(false);
$table->softDeletes();
$table->timestamps();
});
}
标签表:
public function up()
{
Schema::create('tags', function (Blueprint $table) {
$table->increments('id');
$table->string('name')->unique();
$table->string('slug')->unique();
$table->softDeletes();
$table->timestamps();
});
}
我有一个数据透视表来处理帖子和帖子上带有这些标签的标签。
post_tag表:
public function up()
{
Schema::create('post_tag', function (Blueprint $table) {
$table->increments('id');
$table->integer('post_id')->unsigned();
$table->foreign('post_id')->references('id')->on('posts')->onDelete('cascade');
$table->integer('tag_id')->unsigned();
$table->foreign('tag_id')->references('id')->on('tags')->onDelete('cascade');
});
}
一切都很好,一个标签有很多帖子,一个帖子有很多标签,是多对多的关系。
发布模型:
public function tags()
{
return $this->belongsToMany('App\Tag');
}
标签型号:
public function posts()
{
return $this->belongsToMany('App\Post');
}
我可以在帖子上显示所有标签,但我想通过标签显示相关帖子,当我说相关帖子时,我的意思是访客正在阅读的“当前帖子”。让我们说这个当前帖子有微软,谷歌,苹果,汽车标签,我想要相关的帖子到这些标签。我不知道这是否可能或者更容易按类别进行。
新闻控制器逻辑:
这里是我对帖子视图的所有逻辑。
public function getSingle($slug, $id = null)
{
$post = Post::where('slug', '=', $slug)->first();
$topcat = Category::orderBy('created_at', 'desc')->limit(5)->get();
$comment = Comment::find($id);
$tags = Tag::all();
$tags2 = array();
foreach ($tags as $tag) {
$tags2[$tag->id] = $tag->name;
}
// Previous and Next Post
$previous = Post::where('id', '<', $post->id)->orderBy('id', 'desc')->first();
$next = Post::where('id', '>', $post->id)->orderBy('id', 'asc')->first();
// Related Posts Here!
$tags3 = array();
foreach ($post->tags as $tag) {
$tags3[$tag->id] = $tag->name;
}
$related = Post::whereHas('tags', function ($query) use ($tags3) {
$query->where('name', $tags3);
})->get();
// dd($related);
return view('news.single')
->withPost($post)
->withTopcat($topcat)
->withTags($tags2)
->withComment($comment)
->withPrevious($previous)
->withNext($next)
->withRelated($related);
}
我做了$tags3
变量来测试它,但我得不到我想要的。
提前致谢
答案 0 :(得分:3)
这应该有效:
std::set<T, C>
$post = Post::where('slug', '=', $slug)->first();
$related = Post::whereHas('tags', function ($q) use ($post) {
return $q->whereIn('name', $post->tags->pluck('name'));
})
->where('id', '!=', $post->id) // So you won't fetch same post
->get();
行创建一个包含所有标记名称的数组(属于帖子)。