修改文章

    path('update_art/<int:id>/', views.update_art, name='update_art'),

def update_art(request, id):
    article = get_object_or_404(Article, id=id)
    if request.method == 'POST':
        article_update_form = ArticleAddForms(request.POST)
        if article_update_form.is_valid():
            data = article_update_form.cleaned_data
            article.article_title = data['article_title']
            article.article_context = data['article_context']
            article.save()
            # 修改完成，重定向到当前文章的详情
            return redirect(reverse('article:article_detail', kwargs={'id': id, }))
        else:
            article_update_form = ArticleAddForms()
            context = {
                'article': article,
                'article_update_form': article_update_form,
                'msg': '编辑失败',
            }
            return render(request, 'update_art.html', context)
    else:
        article_update_form = ArticleAddForms()
        context = {
            'article': article,
            'article_update_form': article_update_form,
        }
        return render(request, 'update_art.html', context)

<!-- 提交文章的表单 -->
        <form method="post" action=" ">
            {% csrf_token %}

            <!-- 文章标题 -->
            <div class="form-group">
                <!-- 标签 -->
                <label for="title">文章标题</label>
                <!-- 文本框 -->
                <input type="text" class="form-control" id="title" name="article_title" value="{{ article.article_title }}">
            </div>
            <!-- 文章正文 -->
            <div class=" form-group">
                <label for="body">文章正文</label>
                <!-- 文本区域 -->
                <textarea type="text" class="form-control" id="body" name="article_context"
                          rows="12">{{ article.article_context }}</textarea>
            </div>
            <!-- 提交按钮 -->
            <button type="submit" class="btn btn-primary">完成</button>
        </form>

            {% if article.art_user == request.user %}
                <a href="{% url 'article:update_art' article.id %}" class="btn btn-info" role="button">编辑</a>
                <a href="#" class="btn btn-danger" data-toggle="modal" data-target="#exampleModal" role=" button">删除</a>
                <a href="#" class="btn btn-light" role="button">私密</a>
            {% endif %}