Saving multiple IDs in a HasMany Eloquent relationship - php

Question

I have a model Foo, which has many Bars:
class Foo extends Model
{
public function bars()
{
return $this->hasMany('App\Bar');
}
}
class Bar extends Model
{
public function foo()
{
return $this->belongsTo('App\Foo');
}
}
When saving a new Foo, the request payload comes with an array of Bar ids. I want to save these at the same time. This works:
public function store(StoreFoo $request)
{
$foo = Foo::create($request->validated());
foreach ($request->barIds as $barId) {
$foo->bars()->create(['bar_id' => $barId]);
}
}
My question is: is there a way to do this without a loop? I've tried sync and attach but these aren't applicable in this case.

Answer 1

The only way I can think of that you can achieve this without writing a loop yourself is by using the saveMany method on the HasMany relation. You can create instances of your Bar model and pass them all as an array to the saveMany method and that will save all of them and return an array of the created entities in response.
$foo->bars()->saveMany([new Bar(['id' => 1]), new Bar(['id' => 2])]);
That being said, Laravel uses a loop to save these models one by one under the hood so it doesn't really do much different to what you're doing now.
Similarly, there's also a createMany method that you can use in the same way as saveMany but instead of providing newly created models, you can provide arrays of attributes instead.

Answer 2

migration table sample
Schema::create('logs', function(Blueprint $table) {
$table->bigIncrements('id');
$table->unsignedBigInteger('user_id')->default(0)->index();
$table->string('type', 10)->index(); // add, update, delete
$table->string('table', 50)->index();
$table->unsignedBigInteger('row');
$table->dateTime('created_at');
});
Schema::create('log_fields', function(Blueprint $table) {
$table->bigIncrements('id');
$table->unsignedBigInteger('log_id')->index();
$table->string('field', 50)->index();
$table->longText('old');
$table->longText('new');
});
model Log.php file
class Log extends Model
{
const UPDATED_AT = null;
protected $fillable = [
'user_id',
'type',
'table',
'row'
];
public function logFields()
{
return $this->hasMany(LogField::class);
}
}
model LogField.php file
class LogField extends Model
{
public $timestamps = false;
protected $fillable = [
'field',
'old',
'new'
];
public function log()
{
return $this->belongsTo(Log::class);
}
}
boot function for another model for save change in database.
hook created, updating and deleting for answer your question
public static function boot()
{
parent::boot();
static::created(function($resorce) {
$_log = new Log;
$_log->create([
'user_id' => session('uid', 0),
'type' => 'add',
'table' => $resorce->getTable(),
'row' => $resorce->fresh()->toArray()['id']
]);
return true;
});
static::updating(function($resorce) {
$_log = new Log;
$log = $_log->create([
'user_id' => session('uid', 0),
'type' => 'update',
'table' => $resorce->getTable(),
'row' => $resorce->fresh()->toArray()['id']
]);
foreach($resorce->getDirty() as $field => $new) {
$log->logFields()->create([
'field' => $field,
'old' => $resorce->fresh()->toArray()[$field],
'new' => $new
]);
}
return true;
});
static::deleting(function($resorce) {
$_log = new Log;
$log = $_log->create([
'user_id' => session('uid', 0),
'type' => 'delete',
'table' => $resorce->getTable(),
'row' => $resorce->id,
]);
foreach($resorce->fresh()->toArray() as $field => $value) {
$log->logFields()->create([
'field' => $field,
'old' => '',
'new' => $value
]);
}
return true;
});
}
Hope I have helped you to understand this.