Php variable and the variable assignment value returns different values

Question

I am facing a really weird problem. The problem is shortly:

$x = some_object;
return response()->json($x)            =>  {}  
return response()->json(some_object)   =>  {some_object}

This is all of the code(The code goes inside the else statement):

public function checkCalls(Request $req)
{
    $active_call = VideoCall::where("receiver_id", (int) $req->input("user_id"));

    if ($active_call->where("call_situation", "call")->exists()) {
        $active_call = $active_call->first();

        $caller_id = $active_call->caller_id;
        $caller = User::where("id", $caller_id)->first();
        $caller_name = $caller->name;
        $caller_img = $caller->image;
        return response()->json([
            "friend" => $caller_id,
            "caller_name" => $caller_name,
            "caller_img" => $caller_img
        ]);
    } else if ($active_call->where("call_situation", "yes")->exists()) {
        return response()->json("gorusme yapıyor");
    } else if ($active_call->where("call_situation", "decline")->exists()) {
        $caller_id = $active_call->where("call_situation", "decline")->first()->caller_id;
        return response()->json("arama red edildi", $caller_id);
    } else {
        return response()->json("arama yok"); 
        //this code runs, I m changing here to get different returns  
    }
}

When I change inside the else brackets, this returns true

return response()->json(VideoCall::where("receiver_id", (int) $req->input("user_id"))->exists());

But this returns false:

return response()->json($active_call->exists());

$active_call returns an empty object for some reason. The only explanation is that $active_call changes in if() parentheses but I can't find anything that can change it. So why is this happening?

*Edit: Made the question clearer, added a shorter version of the problem.

*Edit 2: The code inside the else statement is running. I m changing that return statement to get different results

Please improve your question title; it is incredibly vague and is very unlikely to attract researchers that are suffering the same issue. — mickmackusa
– mickmackusa ♦, Commented May 15, 2020 at 5:08

Joundill · Accepted Answer · 2020-05-15 04:44:55Z

1

It's because you're re-assigning $active_call in your function:

$active_call = $active_call->first();

It's no longer a Builder, but is instead a VideoCall.

So, this line:

return response()->json($active_call->exists());

Is actually:

return response()->json(VideoCall::where("receiver_id", (int) $req->input("user_id"))->first()->exists());

Note the additional ->first()

answered May 15, 2020 at 4:44

Joundill

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9 Comments

Furkan Atılgan Over a year ago

No the code inside the else statement runs. It's not going in the first if statement. I should specify that in the question though. Its kinda confusing

Furkan Atılgan Over a year ago

I fixed it, sorry for the confusion.

Furkan Atılgan Over a year ago

Also, I tried to run the code by commenting the re-assignment line. It's still the same.

Joundill Over a year ago

Running ->where() on a Builder modifies the builder. Try running return response()->json($active_call->exists()); immediately after you assign $active_call and it will work as expected. The ->where() calls in your if and else ifs are changing $active_call too.

Joundill Over a year ago

Also, use dd($active_call->toSql()) to debug your query. The query you're building isn't what you think it is.

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