Django 过滤器功能与 ajax 不工作

Question

我有一个用于跟踪工作申请的表格，并且我正在尝试实现过滤功能。 我想用分页显示结果。 但是，我在尝试这样做时遇到了错误，并且似乎无法摆脱它。 我希望在不刷新页面的情况下显示结果。 我认为问题在于查询。

请帮忙.... ：（（（

这是我的代码：

模板文件

 <ul id="filter_list" class="dropdown-menu">
     <li><a href="#">Alphabetical Order (A-Z)</a></li>
     <li><a href="#">Application Date (Ascending)</a></li>
     <li><a href="#">Application Date (Descending)</a></li>
     <li><a href="#">Closing Date</a></li>
 </ul>

 <div id="table_results">

 <div>

 <script>

    $(".dropdown-menu a").click(function(){
    var selected_filter = $(this).text();


    $.ajax({
        url:'{% url "stu_filter_applications" %}',
        data:{
            "filter_category": selected_filter,
        },
        dataType:'json',
        success: function (response) {
            //I want the page to not refresh here                  
            },
          error: function (response) {
            console.log(response.errors);
          },
        });

    });
</script>

视图.py：

def stu_filter_applications(request):
    filter_cat = request.GET.get("filter_category", None)
    student = StudentUser.objects.get(user=request.user)

    if filter_cat == "Alphabetical Order (A-Z)":       
        int_applications = 
        InternshipApplication.objects.filter(student=student).
        order_by('internship__internship_title')

    if filter_cat == "Application Date (Ascending)":
        int_applications = 
        InternshipApplication.objects.filter(student=student).
        order_by('application_date')

    if filter_cat == "Application Date (Descending)":
        int_applications = 
        InternshipApplication.objects.filter(student=student).
        order_by('-application_date')

    if filter_cat == "Closing Date":
         int_applications = 
         InternshipApplication.objects.filter(student=student).
         order_by('-internship__internship_deadline')

     applications = []

    for app in int_applications:
        internship = Internship.objects.get(id=app.internship.id)
        recruiter = Recruiter.objects.get(id=internship.recruiter.id)
        applications.append((internship,recruiter,app))


    for internship, recruiter, app in applications:
        print(internship)
        print(recruiter)
        print(app)

    paginator = Paginator(applications, 3)
    page = request.GET.get('page', 1)

        try:
            applications = paginator.page(page)

        except PageNotAnInteger:
            applications = paginator.page(1)

        except EmptyPage:
            applications = paginator.page(paginator.num_pages)
        context = {    
              'applications': applications,
              'filter_by': filter_cat,
         }
            return render(request,'track_internship.html', context)
    

track_internship.html

<ul id="filter_list" class="dropdown-menu">
      <li><a href="#">Alphabetical Order (A-Z)</a></li>
      <li><a href="#">Application Date (Ascending)</a></li>
      <li><a href="#">Application Date (Descending)</a></li>
      <li><a href="#">Closing Date</a></li>
</ul>
     

        
  <table style="width:100%; margin-top: 20px;"  id="app_table" class="table">
                <thead>
                    <tr style="background-color:#012D6C; color:white;" 
            class="table_row">
                        <th>Company</th>
                        <th>Title</th>
                        <th>Type</th>
                        <th>Link to advert</th>
                        <th>Posted Date</th>
                        <th>Closing Date</th>
                        <th>Application Date</th>
                        <th>Status</th>
                    </tr>
                </thead>

        <div id="table_results">
                <tbody>
                    {% for internship, recruiter, app in applications %}
                    <tr style="background-color: #E9F4FF" class="table_row">
                        <td>{{ recruiter.company_name }}</td>
                        <td>{{ internship.internship_title }}</td>
                        <td>{{ internship.internship_mode}}</td>
                        <td><a style="color:blue; text-decoration: 
                underline;" href="http://127.0.0.1:8000/view_details/{{ 
                internship.id }}">Click here</a></td>
                        <td>{{ internship.posted_date }}</td>
                        <td>{{ internship.internship_deadline }}</td>
                        <td>{{ app.application_date }}</td>
                        <td>{{ app.status }}</td>
                    </tr>
                    {% endfor%}
                </tbody>
            </table>
        

        {% if applications.has_other_pages %}
        
        <div class="pagination">
            {% if applications.has_previous %}
            <a href="?page={{ applications.previous_page_number }}"><i 
            class="fa fa-chevron-left" aria-hidden="true"></i></a>
            {% else %}
                <a class="disabled"><span><i class="fa fa-chevron-left" aria- 
             hidden="true"></i></span></a>
            {% endif %}
            
            {% if applications.number|add:'-2' > 1 %}
                <a href="?page={{ applications.number|add:'-3' }}">&hellip; 
            </a>
            {% endif %}
            
            {% for i in applications.paginator.page_range %}
                {% if applications.number == i %}
                    <a class="active"><span>{{ i }} <span class="sr-only"> 
                (current)</span></span></a>
                {% elif i > applications.number|add:'-3' and i < 
            applications.number|add:'3' %}
                    <a href="?page={{ i }}">{{ i }}</a>
                {% endif %}
            {% endfor %}
            
            {% if applications.paginator.num_pages > 
             applications.number|add:'4' %}
                <a href="?page={{ applications.number|add:'3' }}">&hellip; 
            </a>
            {% endif %}
            
            {% if applications.has_next %}
                <a href="?page={{ applications.next_page_number }}"><i 
            class="fa fa-chevron-right" aria-hidden="true"></i></a>
            {% else %}
                <a class="disabled"><span><i class="fa fa-chevron-right" 
            aria-hidden="true"></i></span></a>
            {% endif %}

    

模型.py

class StudentUser(models.Model):

   user = models.OneToOneField(User, on_delete=models.CASCADE)
   gender = models.CharField(max_length=1, choices=GENDER_CHOICES, 
   null=True, blank=True)

 class Internship(models.Model):

     recruiter = models.ForeignKey(Recruiter, on_delete=models.SET_NULL, null=True)
     internship_title = models.CharField(max_length=100)
     internship_deadline = models.DateField()
 

 class InternshipApplication(models.Model):
     internship = models.ForeignKey(Internship, on_delete=models.CASCADE)
     student = models.ForeignKey(StudentUser,on_delete=models.SET_NULL, null=True)
     application_date = models.DateField()

Answer 1

根据你的 model，模板，视图你需要更改以下内容：

1. 将实习生.internship_deadline 更改为实习__internship_deadline 并将实习生.internship_title 更改为实习__internship_title。

2. 您可以将实习、招聘人员、int_applications 作为单独的对象传递。 int_applications 应该返回多个对象，这与您使用过的招聘人员和实习生不同。get()

3. 在使用 orderby 的分页模板中，url 必须如下：

   ?page=value&filter_category=value

4. 在您的 views.py 中，您似乎只是根据用户输入对值进行排序，因此我建议您将其更改为 order_by，因为您除了排序之外没有过滤任何内容。