检查是否返回以前的状态，以便用户可以再次借书

Question

Sample Image

如何比较/检查是否返回了用户的先前状态。如果返回，则该用户可以借书。如果不是，或者当前的状态是当前借用的，则他不能借书。

代码似乎不正确。如果用户借书，则修复状态将始终为“待处理”。

这里是我做的，但是不起作用。

if ($borrow->status === 'Returned') {
    $borrow = new BorrowBook();
    $borrow->book_name = $borrow->book_name;
    $borrow->date_borrowed = $borrow->date_borrowed('date_borrowed');
    $borrow->status = 'Pending';
} elseif (BorrowBook::where('status', $borrow->status === 'Currently Borrowed')->exist()) {
    return redirect('/borrow')->with('success', 'Your previous book has not been returned yet');
}

Answer 1

您的elseif总是返回true，请尝试使用它，

elseif(count(BorrowBook::where('status',$borrow->status == "Currently Borrowed")->get())) {
    return redirect('/borrow')->with('success','Your previous book has not been returned yet');
}