单击时的SQL增量（使用ajax）-SQLincrementonclick(usingajax)

I'm working on a simple button that will allows to increment a line in my table. Thanks to AJAX, when the button +1 is clicked, it is replaced by a -1 button. But the problem occurs when I click once on +1, then -1 and a second time on +1.

我正在研究一个简单的按钮,它可以增加表格中的一行。感谢AJAX,当点击按钮+1时,它被-1按钮取代。但是当我在+1上点击一次然后在+1上再次点击-1时会出现问题。

This is what i'm having :

这就是我所拥有的:

vote = 0
click on "+1"
 vote = 1
click on "-1"
 vote = 0
click on "+1"
 vote = 2
click on "-1"
 vote = 0
click on "+1"
 vote = 3

So as you can see, vote should be egal to 1...

所以你可以看到,投票应该是1 ...

Here is my code :

这是我的代码:

 -1
 +1

AJAX :

        $('button').on("click", function test() {
        $(this).off("click");

        var ID = $(this).attr("id");

        if($(this).hasClass('button2')) {
            $.ajax({
                type: "POST",
                url: "add.php",
                data: {"ID_oeuvre": ID},
                success: function(html){
                    $("button#"+ID).removeClass("button2").addClass("button").html("-1");
                    $("button#"+ID).on("click", test);
                }
            });
        } else {
            $.ajax({
                type: "POST",
                url: "delete.php",
                data: {"ID_oeuvre": ID},
                success: function(html){
                    $("button#"+ID).removeClass("button").addClass("button2").html("+1");
                    $("button#"+ID).on("click", test);
                }
            });
            $(this).on("click", test);
        };
    });

ADD.PHP

    $requete = $bdd->prepare('UPDATE vote SET nb_vote = nb_vote + 1 WHERE ID_member = :ID_member');
    $requete->execute(array('ID_member' => $member_ID));
    $requete->closeCursor();

DELETE.PHP is the same as above, just replace nb_vote + 1 with nb_vote - 1

DELETE.PHP与上面相同,只需用nb_vote - 1替换nb_vote + 1

This problem only happens when I don't reload the page. If I reload the page after each click on the button, there is no problem. So I think that the problem is due to the fact that since there is no page reloading, nb_vote kept the old value but that doesn't explain why it goes back to 0 after that...

只有在我不重新加载页面时才会出现此问题。如果我在每次单击按钮后重新加载页面,则没有问题。所以我认为问题是由于没有页面重新加载这一事实,nb_vote保留了旧的值,但这并不能解释为什么它会在之后回到0 ...

Thank you very much for your help.

非常感谢您的帮助。

Regards.

1 个解决方案

$(this).on("click", test);