Serellyn Serellyn - 5 months ago 32
JSON Question

Laravel: JSON and pivot table

Sorry about the non-explanatory title but I could not come up with a descriptive one.

I've got the following 3 tables:
- games
- platforms
- games_platforms

And I've got 2 Models in Laravel for both Platform and Game.

public function games()
{
return $this->belongsToMany('App\Game', 'games_platforms')->withPivot('release_date');
}

public function platforms()
{
return $this->belongsToMany('App\Platform', 'games_platforms')->withPivot('release_date');
}


Now this works like a charm, I get a JSON string with all the information in the 3 tables, like this.

[{
"id": 1,
"name": "Borderlands",
"short_description": "",
"created_at": null,
"updated_at": null,
"platforms": [{
"id": 4,
"name": "PC",
"pivot": {
"game_id": 1,
"platform_id": 4,
"release_date": "2016-03-03"
}
}]
}]


Now my problem is as follows. I don't want to show the whole 'pivot' information, just the 'release_date', like this:

"platforms": [{
"id": 4,
"name": "PC",
"release_date": "2016-03-03"


Is there an easy way in Laravel to do such a thing? As far as I can see right now, looking at other posts, is to either write a function that turns the json into an array and I can arrange it then. Or I can write my own query instead of letting Laravel do all that.

Hope you guys can help me with this issue. Thanks!

Answer

I would modify the data returned from the query via methods on the collection class:

//replace Game::all() with your actual query
return Game::all()->each(function($game){
    $game->platforms->map(function($platform){
        $platform->release_date = $platform->pivot->release_date;
        unset($platform->pivot);
        return $platform;
    });
});