質問編集履歴
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javascript preventDefaultの使い方
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Django AjaxでIikeボタンの作成をしています。
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ー参考サイトー
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[https://github.com/hellopyplane/Social-Network](https://github.com/hellopyplane/Social-Network)
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Likeを押す際にページを読み込みたくないのですが、が読み込まれてしまいます。
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バージョンなどは全て最新にしましたが、上手くいきませんでした。
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`preventDefault`の指定箇所をいろいろ変更してみたのですが、読み込まれてしまいます。
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そもそも書き方が違うのでしょうか?
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```python
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models.py
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class Item(models.Model):
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post_user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
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title = models.CharField(verbose_name='タイトル',max_length=200,)
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memo = models.TextField(verbose_name='備考',max_length=300,blank=True,null=True,)
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created_at = models.DateTimeField(verbose_name='登録日',auto_now_add=True)
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liked = models.ManyToManyField('User', blank=True, related_name='likes')
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# 管理サイト上の表示設定
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def __str__(self):
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return self.title
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class Meta:
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verbose_name = 'アイテム'
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verbose_name_plural = 'アイテム'
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def num_likes(self):
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return self.liked.all().count()
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```
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```python
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#Likeボタン実装
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@login_required
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def like_unlike_post(request):
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user = request.user
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if request.method == 'POST':
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post_id = request.POST.get('post_id')
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post_obj = Item.objects.get(id=post_id)
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profile = User.objects.get(user_name=user)
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if profile in post_obj.liked.all():
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post_obj.liked.remove(profile)
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else:
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post_obj.liked.add(profile)
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like, created = Like.objects.get_or_create(user=profile, post_id=post_id)
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if not created:
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他に必要なものがあれば追記いたします。よろしくお願いいたします。
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like.value='Unlike'
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else:
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like.value='Like'
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else:
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like.value='Like'
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post_obj.save()
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like.save()
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#data = {'value': like.value,'likes': post_obj.liked.all().count()}
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#return JsonResponse(data, safe=False)
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return redirect('app:top')
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```
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```python
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urls.py
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path('', ItemFilterView.as_view(), name='top'),
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path('liked/', like_unlike_post, name='like-post-view'),
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```
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```html
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<form action="{% url 'app:like-post-view' %}" method="POST" class='like-form' id='{{item.id}}'>
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{% csrf_token %}
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<input type="hidden" name="post_id" value={{item.id}}>
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<div class="LikesIcon">
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{% if user not in item.liked.all %}
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<i class="far fa-heart LikesIcon-fa-heart"></i><div class="like-count{{item.id}}"></div>
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{% else %}
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<i class="fas fa-heart LikesIcon-fa-heart" style="color:red;"></i><div class="like-count{{item.id}}"></div>
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{% endif %}
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</div>
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</form>
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```
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```javascript
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<script>
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$('.like-form').click(function() {
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$('form').submit();
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});
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$('.like-form').submit(function(e){
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<script>
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function getCookie(name) {
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var cookieValue = null;
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if (document.cookie && document.cookie !== '') {
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var cookies = document.cookie.split(';');
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for (var i = 0; i < cookies.length; i++) {
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var cookie = jQuery.trim(cookies[i]);
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// Does this cookie string begin with the name we want?
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if (cookie.substring(0, name.length + 1) === (name + '=')) {
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cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
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break;
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}
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}
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}
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return cookieValue;
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}
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var csrftoken = getCookie('csrftoken');
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function csrfSafeMethod(method) {
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// these HTTP methods do not require CSRF protection
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return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
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}
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$.ajaxSetup({
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beforeSend: function (xhr, settings) {
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if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
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xhr.setRequestHeader("X-CSRFToken", csrftoken);
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}
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}
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});
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$('#like-form').on('submit', e => {
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// デフォルトのイベントをキャンセルし、ページ遷移しないように!
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e.preventDefault()
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e.preventDefault()
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const
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const hasLike = $(`.LikesIcon${post_id}`).find('i').hasClass('like')
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const url = $(this).attr('action')
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success: function(response) {
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if(
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if(hasLike) {
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$(`.like-btn${post_id}`).te
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$(`.like-btn${post_id}`).html('<i class="far fa-heart LikesIcon-fa-heart"></i>')
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res = trimCount - 1
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} else {
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$(`.like-btn${post_id}`).t
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$(`.like-btn${post_id}`).html('<i class="fas fa-heart LikesIcon-fa-heart"></i>')
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res = trimCount + 1
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})
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})
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// Likeボタンクリック
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$('.LikesIcon').on('click', function() {
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let $btn = $(this);
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// Likeボタンがonクラス持っていたら
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if ($btn.hasClass('on')) {
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$btn.removeClass('on');
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// 白抜きアイコンに戻す
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$btn.children("i").attr('class', 'far fa-heart LikesIcon-fa-heart');
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} else {
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$btn.addClass('on');
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$btn.children("i").attr('class', 'fas fa-heart LikesIcon-fa-heart heart');
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}
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})
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</script>
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{% endblock %}
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```
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Ajaxが間違っていると思い[このサイト](https://blog.narito.ninja/detail/88/)を見ながらやってもページがローディングされます。
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よろしくお願いします。
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