Question

在这一步中，我试图避免制作一个将数据从前端发送到django的表单。理想情况下，我想使用一个onclick按钮将一个简单的字符串传递给queryset，这样我就可以在Post模型上创建标签过滤器，并使用来自字符串输入的标签显示标签过滤器。（只需将字符串发送到queryset，我就可以处理split（）和strip（）以使其有效）

简化的html类似于

    AndroidNetworking.upload(url)
                     .addMultipartParameter("user_id",dataManager!!.userId)
                     .addMultipartParameter("property_id",dataManager!!.propertyId)
                     .addMultipartParameter("firstname",dataManager!!.firstname)
                     .addMultipartParameter("lastname",dataManager!!.lastname)

                     .addMultipartParameter("questionsModel",editFormRequest.questionsModels) //here i want put my List whith objects,but function not receive this parameter
                     .setPriority(Priority.HIGH)
                     .build()
                     .getAsObject(EditFormResponse::class.java,object :ParsedRequestListener<EditFormResponse>{
                            override fun onResponse(response: EditFormResponse?) {
                                Log.d("editForm","onResponse message " + response!!.message)
                                progressBar.invisible()
                            }

                            override fun onError(anError: ANError?) {
                                Log.d("editForm","onError message " + anError!!.message)
                                toast(getString(R.string.server_error))
                                progressBar.invisible()
                            }
                      })

和ListView

<input type="text" name="tag_filter">
<button type="button" onclick="Tag_Filter()">Filter</button>

<script>

  function Tag_Filter() {
    var tags;
    tags = document.getElementById("tag_filter");
  }

</script>

urls.py

class PostListView(ListView):
model = Post #.objects.filter(tags__name__in=["black&white", "red"]).distinct()
template_name = 'post/home.html'    # <app>/<model>_<viewtype>.html
#queryset = Post.objects.all()
context_object_name = 'posts'
#ordering = ['-date_posted']

def get_queryset(self):
    tag_list = #the return from the Tag_Filter() js
    return Post.objects.filter(tags__name__in=tag_list).annotate(num_tags=Count('tags')).filter(num_tags__gte=len(tag_list)).order_by('-date_posted').distinct()

Answer 1

我建议使用ajax，然后第一步是实现ajax ... ajax来自Jquery，那么您只需要在模板上为一个文件html包含jquery，或者如果您更喜欢在文件末尾的base.html中添加jquery在您的身体结束标记之前：

<!-- jQuery library -->
<script src="{% static 'Jquery/jquery.min.js' %}"></script>
....
...
all my files js
....
</body>
</html>

要下载此jquery.min.js，请转到此链接并将文件保存到文件夹：static / Jquery /：

Link for download Jquery min.js

别忘了另存为 jquery.min.js

接下来是设置您的settings.py以接受静态文件：

STATIC_URL = '/static/'

STATICFILES_DIRS = [
    os.path.join(BASE_DIR, "static"),
    '/static/',
]

接下来，根据需要，将用于加载静态文件的标签放在文件html或base.html的顶部：

{% load staticfiles %}
<!DOCTYPE html>
<html>
...
...
...
 <!-- jQuery library -->
<script src="{% static 'Jquery/jquery.min.js' %}"></script>
....
...
all my files js
....
</body>
</html>

好吧，现在我们包含 $。ajax ，首先您需要在按钮上包含一个函数，该函数可以从输入中获取值：

<input type="text" name="tag_filter" id ="tag_filter">
<button type="button" onclick="tag_filter()">Filter</button>

现在您的函数tag_filter：

   function getCookie(name) {

      var cookieValue = null;
      if (document.cookie && document.cookie != '') {
          var cookies = document.cookie.split(';');
          for (var i = 0; i < cookies.length; i++) {
              var cookie = jQuery.trim(cookies[i]);
              // Does this cookie string begin with the name we want?
              if (cookie.substring(0, name.length + 1) == (name + '=')) {
              cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                  break;
              }
          }
      }
      //RETURN YOUR TOKEN FROM DJANGO FOR SEND FROM AJAX
      return cookieValue;

    }//end function getCookie

function tag_filter(){
   var tag_filter = $("#tag_filter").val();
   if(tag_filter == '' || tag_filter == null){
     alert('write yout filter for search !!');
     return false;
   }
   //now we include the ajax call
       //token
        var csrftoken = getCookie('csrftoken');
        $.ajax({
            type: "GET",
            url: "search_filter",
            data:{
                csrfmiddlewaretoken : csrftoken, 
                tag_filter:tag_filter,
            },
            dataType: "json",
            success: function(data) {
                code = data.result;
                if(code=='ok_select'){
                 // here write you code for the success answer from ajax call
                 console.log(data);
                }
            },
            error: function( jqXHR, textStatus, errorThrown ) {

             alert('Error ' + jqXHR.responseText);


            }//end error
        }); 
}

现在您需要使用参数示例创建搜索用的def：

from django.http import HttpResponse, JsonResponse

    ...
    ..
    def SearchFilter(request):
    filter = request.GET['tag_filter']
    ....
    ....
    data ={
    'result':'ok_select'
    'data': #your query
    }
    return JsonResponse(data, safe=False)

现在您需要在您的urls.py示例中声明此定义：

from myapp.views import SearchFilter
urlpatterns = [
    url(r'^search_filter', SearchFilter, name='search_filter'),
...
...
]

这就是全部...对于ajax，通过控制台返回成功答案，请从您的Web浏览器收藏夹中在控制台上检查此答案。

祝你好运.. !!

来自js文本输入的get_queryset（）

1 个答案: