Laravel, how to update two tables with a one-to-one relationship from a single form - laravel-5.1

Question

I have these two very simple models:
class Episode extends Model
{
protected $fillable = ['number', 'language_code', 'published_at'];
function content()
{
return $this->hasOne('App\EpisodeContent');
}
}
class EpisodeContent extends Model
{
protected $table = 'episodes_content';
protected $fillable = ['episode_id', 'title', 'description'];
function episode()
{
return $this->belongsTo('App\Episode');
}
}
Where basically every Episode has one content. I could've used a single table, but I thought it could make sense to keep these sets of data separate.
In a form, I'd like to edit the Episode and its content at the same time, but after several attempts I haven't figured out how.
This is what I'm doing:
public function update(Request $request, $id)
{
$rules = [
'number' => 'required',
];
$this->validate($request, $rules);
$episode = Episode::with('content')->findOrFail($id);
$episode->published_at = $request->get('published_at');
$episode->number = $request->get('number');
$episode->content->title = $request->get('title');
$episode->update();
return redirect('admin/episodes');
}
This way, nothing changes in the episodes_content table.
In another attempt, I tried this:
$episode->published_at = $request->get('published_at');
$episode->number = $request->get('number');
$episode->active = $request->get('active');
$episodeContent = new EpisodeContent;
$episodeContent->title = $request->get('title');
$episode->content()->save($episodeContent);
This way, a new episodes_content row is created, while I'd like to update an existing one.

Answer 1

Try this I guess it will work
$episode = Episode::with('content',function($query) use($id){
$query->where('episode_id',$id);
})->where('id',$id);
Here I'm assuming your field name is id in parent table and episode_id in child table. Let me know if it doesn't work.