Question

尝试在this example之后完成一个相当简单的链式选择。这是我能找到的最适合我有限要求的例子，并认为它只需要一些重命名来匹配我的设置。

models.py

class Category(models.Model):
    """Category"""
    name = models.CharField(max_length=50)
    slug = models.SlugField()


    def save(self, *args, **kwargs):
                # Uncomment if you don't want the slug to change every time the name changes
                #if self.id is None:
                        #self.slug = slugify(self.name)
                self.slug = slugify(self.name)
                super(Category, self).save(*args, **kwargs)
    def __unicode__(self):
        return self.name
#        return u'%s' % (self.name)

class SubCategory(models.Model):
    """Sub Category"""
    category = models.ForeignKey(Category)
    name = models.CharField(max_length=50)
    slug = models.SlugField()

    def save(self, *args, **kwargs):
                # Uncomment if you don't want the slug to change every time the name changes
                #if self.id is None:
                        #self.slug = slugify(self.name)
                self.slug = slugify(self.name)
                super(SubCategory, self).save(*args, **kwargs)

    def __unicode__(self):
#        return self.name
        return u'%s' % (self.name)

class Website(models.Model):
    """ service website."""
    url = models.URLField(validators=[validate_onion_url], unique=True)
    # service
    id = models.CharField(primary_key=True, max_length=16,
    validators=[MinLengthValidator(16), MaxLengthValidator(16)], unique=True)
    #is this domain banned
    banned = models.BooleanField(default=False)
    #is it online or offline
    online = models.BooleanField(default=False)
    #echo -e "BLAHBLAHBLAH.onion\c" | md5sum
    #hashlib.md5(url[8:-1]).hexdigest()
    md5 = models.CharField(max_length=32,
    validators=[MinLengthValidator(32), MaxLengthValidator(32)], unique=True)
    updated = models.DateTimeField(auto_now=True, auto_now_add=True)
    sub_categories = models.ForeignKey(SubCategory, default=1)
    referral = models.TextField(blank=True)
    class Meta:
        """Meta class."""
        app_label = 'ahmia'
    def __unicode__(self):
#        return self.url
        return u'%s' % (self.url)

和views.py

@require_GET
def category_browser(request):
    """Browser Page"""
    categories = Category.objects.all().prefetch_related('subcategory_set')
    subcategories = SubCategory.objects.filter(category=categories)
    return render(request, 'browser.html', {'categories': categories, 'subcategories': subcategories)

def getdetails(request):
    #country_name = request.POST['country_name']
    subcategory_name = request.GET['cnt']
    print "ajax subcategory_name ", subcategory_name

    result_set = []
    all_websites = []
    answer = str(subcategory_name[1:-1])
    selected_subcategory = SubCategory.objects.get(name=answer)
    print "selected subcategory name ", selected_subcategory
    all_websites = selected_subcategory.website_set.all()
    for website in all_websites:
        print "website name", website.url
        result_set.append({'name': website.url})
    return HttpResponse(simplejson.dumps(result_set), mimetype='application/json', content_type='application/json')

和html模板

<html>
    <head>
    <script type="text/javascript" src="/static/js/jquery-latest.min.js"></script>
    <script type="text/javascript" src="/static/js/script.js"></script>
        <script>
            $(document).ready(function(){
                 $('select#selectsubcategories').change(function () {
                     var optionSelected = $(this).find("option:selected");
                     var valueSelected  = optionSelected.val();
                     var subcategory_name   = optionSelected.text();


                     data = {'cnt' : subcategory_name };
                     ajax('/getdetails',data,function(result){

                            console.log(result);
                            $("#selectwebsites option").remove();
                            for (var i = result.length - 1; i >= 0; i--) {
                                $("#selectwebsites").append('<option>'+ result[i].url +'</option>');
                            };


                         });
                 });
            });
        </script>
    </head>

    <body>
        <select name="selectsubcategories" id="selectsubcategories">
    <option value="" selected="selected">Select Category</option>
    {% for category in categories %}
            <optgroup label="{{ category.name }}">
        {% for item in category.subcategory_set.all %}
            <option val="{{ item.name }}"> {{ item.name }} </option>    
        {% endfor %}
            </optgroup>
    {% endfor %}
        </select>   


        <select name ="selectwebsites" id="selectwebsites">
       </select>

    </body>
</html>

显示类别/子类别的第一个选择框按预期工作，但无论选择哪个子类别，第二个选择框都保持为空。

没有我能看到的错误，也不知道如何调试它。

我假设所遵循的示例是一个非常好的工作解决方案，我怀疑问题是在我的命名方案中的某处，例如我在引用我的外键时把某个子类别和sub_category混在一起？但我可能错了，

很有必要！

编辑：

发现错误，在我的http日志中，我可以看到对/ getdetails的调用，这是有道理的。但是在urls.py中添加/ getdetails后，我的http日志中仍然出现500错误

# Browser Page
urlpatterns += patterns('',
    (r'^browser/', 'rango.views.category_browser'),
    (r'^getdetails/', 'rango.views.getdetails'),
)

Answer 1

很抱歉很快回答我的问题，

将/ getdetails添加到url.py可以解决部分问题，原始示例中没有提到。

dd($game)

并从views.py

中删除

# Browser Page
urlpatterns += patterns('',
    (r'^browser/', 'rango.views.category_browser'),
    (r'^getdetails/', 'rango.views.getdetails'),
)

因为这在django 1.7中贬值似乎

django链式选择框

1 个答案: