保存数据并在Laravel中同时附加

Question

I have a blog app that I need to add tags on post. I have an input field, post model, tag model and 3 tables on database: posts, tags and tag_post with ManyToMany relationship.

When I try to add new tag on table, it send to tag_post table and not tag table. I did trying change my model and controller but it worse.

Post Model

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Post extends Model
{

  protected $filliable = ['PostTitle', 'post', 'slug'];

  public function categories()
  {
    return $this->BelongsToMany('App\Categories', 'category_post');
  }

  public function tags()
  {
    return $this->BelongsToMany('App\Tag', 'tag_post');
  }

}

Tag Model

namespace App;

use Illuminate\Database\Eloquent\Model;

class Tag extends Model
{
    protected $filliable = ['tag'];


    public function posts()
    {
      return $this->BelongsToMany('App\Post', 'tags_post');
    }
}

PostController

public function store(Request $request)
{

    $post = new Post;
    $post->user_id = auth::id();
    $post->PostTitle = $request->PostTitle;
    $post->post = $request->post;
    $post->slug = $request->slug;
    $post->status = '1';
    $post->save();
    $post->categories()->attach($request->categories);

      $tags = new Tag;
    foreach($tags as $tag){
    $tags->tag = $request->tags;
    if($tags->save()){
      $post->tags()->attach($request->tags);
    }
  }

    return redirect('blog')->with('messageSuccess', '¡Tu entrada se ha creado Exitosamente!');
}

Form

<div class="post-panel-3">
            <div class="form-group">
              <label for="postTags">Etiquetas: </label>

              <input  type="text" name="tags[]" value=" " class="form-control" placeholder="Etiquetas" id="tagBox">

            </div>

I edit the if statement but i have this error when i save tags Type error: Argument 1 passed to Illuminate\Database\Grammar::parameterize() must be of the type array, string given, called in C:\laragon\www\asiviajo-app\vendor\laravel\framework\src\Illuminate\Database\Query\Grammars\Grammar.php on line 665

Answer 1

Try to save your tag before attaching it to a post.

Instead of:

...
if ($tag) {
    // Do your stuff
}

do this:

...
if ($tag->save()) {
    // Do your stuff
}

By doing so, the tag is going to be saved in the tag table in your database. After that, in your if statement, your are going to attach the post to that tag you just saved.

Hope it helps!