Laravel inserting into a three-way pivot table - mysql

Question

Summary
I am building a music discovery service. My question is: How do I insert data into the three-way pivot table Tag_Track_User ?
Schema
I have this schema seen here at LaravelSD
It comprises of six main tables (and a few others):
Artists, Albums, Tracks, Tags, Users and Tag_Track_User
The Artists->Albums->Tracks relationship is straightforward and as you'd expect.
Tags, Tracks and Users all relate to one-another as no two can exist without the third.
Relationships
Artists hasMany() Albums
Albums hasMany() Tracks and belongsTo() an Artist
Tracks belongsTo() Albums
Tracks belongsToMany() Tags and belongsToMany() an Users
Tags belongsToMany() Tracks and belongsToMany() an Users
Users belongsToMany() Tags and belongsToMany() an Tracks
Models
User model
public function tags()
{
return $this->belongsToMany('Tag', 'tag_track_user', 'user_mdbid', 'tag_mdbid')->withPivot('track_mdbid');
}
/**
* #return \Illuminate\Database\Eloquent\Relations\BelongsToMany
*/
public function tracks()
{
return $this->belongsToMany('Track', 'tag_track_user', 'user_mdbid', 'track_mdbid')->withPivot('tag_mdbid');
}
The Tag and Track model contain the same respective relationships.
Question
So my question is:
How do I insert data into the Tag_Track_User table? The tag_track_user table is a 3-way pivot table cointaining information about tracks that users have tagged.
You have to be logged in to tag a track (which means I have access to the user’s ID). The tracks ID is accessed as I am displaying it on the page where the form is contained. The tag on the other hand; if it already exists in the tags table, I want to get it’s ID and re-use that (as they are unique), if not, I want to create it, assign it an ID and insert that into the tag_track_user_table.
I need to check whether the Tag exists
If it does, get it's ID
Insert data into the Tag_Track_User table
Thank you
Any help I receive on this, is greatly appreciated.

Answer 1

Well:
$tag = Tag::firstOrCreate(array('text' => $tag_text));
TagTrackUser::create(array(
"tag_mdbid" => $tag->mdbid,
"track_mdbid" => $track->mdbid,
"user_mdbid" => Auth::user()->mdbid
));
Something like that? firstOrCreate does what the name says it does, the rest is pretty straightforward Eloquent.

Answer 2

Since seems that there is not an appropriate pattern in Laravel, the cleaner and easier way is to implement any three-pivot-relationships via a model dedicated to the pivot table:
class Track
public function trackTags()
{
return $this->hasMany('TagTrack');
}
...
class Tag
public function tagTracks()
{
return $this->hasMany('TagTrack');
}
...
class TagTrack
public function track()
{
return $this->belongsTo('Track');
}
public function tag()
{
return $this->belongsTo('Tag');
}
public function anotherRelationship(){
...
}
You can do:
$track->trackTags->myCustomPivotDataAndRelationship()
and in TagTrack you have freedom to add as many relationship and field I want
Note than you can still keep the many to many to use when you don't need to access pivot relationships