Select 2 doesn't show the Selected Options. (Laravel) - php

Question

I'm using select2 jquery plugin, and laravel form model binding to render the data from the server.
While everything else works fine, it doesn't rendered the tags that has been attached to the post as selected option.
there must be something which I'm unaware of, here's my view part.
<div class="form-group">
{!! Form::label('tag_list','Tags:') !!}
{!! Form::select('tag_list[]', $tags,null,['id'=>'tag_list', 'class'=>'form-control','multiple']) !!}
</div>
// This is the select 2 script
$('#tag_list').select2({
'placeholder':'Choose Tags',
tags:true,
tokenSeparators:[",", " "],
createTag:function(newTag){
return{
id:'new:' + newTag.term,
text:newTag.term + '(new)'
};
}
});
And this is a getTagListAtrribute function in Article model
// This is the getTagListAttribute function
public function getTagListAttribute(){
return $this->tags->lists('post_id')->all();
}
And I load the edit form from the controller like this:
public function article_edit($slug){
// fetch the articles.
//$article = DB::table('articles')->where('slug',$slug)->first();
$article = Article::where('slug',$slug)->first();
/*echo '<pre>';
print_r($article->title);
die();*/
$tags = DB::table('tags')->lists('name','tag_id');
$categories=DB::table('categories')->lists('category_name','category_id');
return view('admin.pages.edit', compact('article','tags','categories'));
}
I just want the tags which are associated with article be selected while the page loads, and which I've been unable of. So I'm in the need of help.

Answer 1

Well, since you have tagged the question as laravel-5.1. There are some changes been made to the lists method.
In Laravel 5.0.* it returned just the plain array of keys and/or values that you pass in the lists method. More info here
In Laravel 5.1.*, it returns a Collection object. More Info - Just the code documentation
So, the solution that you are looking for is:
In controller, do this:
$tags = DB::table('tags')->lists('name','tag_id')->toArray();
Or in the view file, do this:
{!! Form::select('tag_list[]', $tags->toArray(), null,['id'=>'tag_list', 'class'=>'form-control','multiple']) !!}
And that should do the trick for you.
EDIT 1:
Remove all() method from getTagsListAttribute(). That is not at all required.
Why are you using DB Facade for querying the tags table ? Since you have already established the relationship, you are unnecessarily executing the SQL Statements. Avoid that as much as you can.
You should get it by simply doing this:
$tags = $article->tags;
EDIT 2:
Are you sure that you have tag_id column in tags table ? I doubt that. I guess that must be a typo.. By mistakenly, you must have typed tag_id instead of id. Cross verify it for the confirmation.
Hope this helps you out. Happy Coding. Cheers.

Answer 2

Set select form tag like this
{!! Form::select('tag_list', $tags, $selected, ['id'=>'tag_list', 'name'=>'tag_list[]','class'=>'form-control','multiple']) !!}
Pass the ids to be selected as array in third ($selected).
So, if
$tags = ['1'=>'one', '2'=>'Two', '3'=>'Three']
and you want One and Three selected, pass these ids as an array to the form select as the third parameter.
so, $selected = [1,3];