Where clause for arrays of single column in laravel - laravel

Question

I'm building a small application on laravel 5.5 where I'm retrieving models with the relationship absence, something like this:
$milestone = Milestone::where('unique_id', $request->id)
->whereDoesntHave('block')
->first();
This is working fine but when I convert milestone variable to an array I'm getting absurd results, I tried:
$milestone = Milestone::where('unique_id', $request->id)
->whereDoesntHave('block', function ($q) use($request){
foreach($request->milestone as $m)
$q->where('unique_id', $m);
})
->first();
Edit:
Following is my relationship:
Milestone Model:
public function block()
{
return $this->morphMany('App\Models\Team\Block', 'block');
}
Block Model:
public function block()
{
return $this->morphTo();
}
and my block database table:
Schema::create('blocks', function (Blueprint $table) {
$table->increments('id');
$table->string('unique_id');
$table->string('block_type');
$table->integer('block_id');
$table->integer('generic_id');
$table->string('type');
$table->integer('user_id');
$table->timestamps();
$table->softDeletes();
});
Help me out in this, Thanks

Answer 1

You should use whereIn rather than a foreach with multiple where clauses. I.e.
$q->whereIn('unique_id', $mArray);
If you chain the where clauses together, those are AND where clauses. As an example
App\Models\User::where('id', 1)->where('id', 2)->toSql();
"select * from `users` where `id` = ? and `id` = ?"
App\Models\User::whereIn('id', [1,2])->toSql();
"select * from `users` where `id` in (?, ?)"
the former gives no results, while the latter gives the results you might expect

Answer 2

Chain whereDoesntHave():
$milestone = Milestone::where('unique_id', $request->id);
foreach($request->milestone as $m) {
$milestone = $milestone->whereDoesntHave('block', function ($q) use($m) {
$q->where('unique_id', $m);
});
}
$milestone = $milestone->first();
Or use whereHas() with whereNotIn():
$milestone = Milestone::where('unique_id', $request->id)
->whereHas('block', function ($q) use($request) {
$q->whereNotIn('unique_id', $request->milestone);
})
->first();