Laravel 5.4 foreign key relation show null in table - mysql

Question

I am trying to save the Client and device foreign keys in my inquiry table but somehow it keeps returning null(my Migration for that is nullable). I get no Errors if I return $Client or $device it Returns a correct id.
This is how the Controller Looks like:
# foreign key in this table rreturns null InquiryController
public function store(Request $request)
{
$input = $request->all();
$client = Client::find($request->input('client_id'));
$device = Device::find($request->input('device_id'));
$stream = new Stream;
$stream->stream_name = $request->input('stream_name');
$stream->save();
$inquiry = new Inquiry;
$inquiry->fill($data);
$inquiry->client()->associate($client);
$inquiry->device()->associate($device);
$inquiry->stream()->associate($stream);
$inquiry->save();
}
And this is my Inquiry Model
class Inquiry extends Model
{
protected $table = 'inquiries';
protected $fillable = ['user_id', 'client_id', 'device_id', 'stream_id'];
# relations
public function user()
{
return $this->belongsTo(User::class);
}
public function client()
{
return $this->belongsTo(Client::class);
}
public function device()
{
return $this->belongsTo(Device::class);
}
public function stream()
{
return $this->belongsTo(Stream::class);
}
}
this is the relation function for the Client and device model:
public function inquiry()
{
return $this->hasMany(Inquiry::class);
}
The Migration:
public function up()
{
Schema::create('inquiries', function(Blueprint $table)
{
$table->increments('id');
$table->unsignedInteger('client_id')->nullable();
$table->unsignedInteger('device_id')->nullable();
$table->timestamps();
$table->foreign('client_id')->references('id')->on('clients')->onDelete('cascade');
$table->foreign('device_id')->references('id')->on('devices')->onDelete('cascade');
});
}
public function down()
{
Schema::dropIfExists('inquiries');
}

Answer 1

Make sure you have your foreign keys defined in the migration for the inquiry table.
For example:
$table->integer('client_id')->unsigned();
$table->foreign('client_id')
->references('id')->on('clients')
->onDelete('cascade');
Update:
Try saving the model before adding the relationships. Swap it around to:
$inquiry = new Inquiry;
$inquiry->fill($data);
$inquiry->save();
$inquiry->client()->associate($client);
$inquiry->device()->associate($device);
$inquiry->stream()->associate($stream);