分页不接受 dict 作为数据 - 不可散列的类型 [英] Pagination doesn't accept dict as data - unhashable type

问题描述

我正在尝试使用 Django 分页 分页文档.但我收到此错误:

TypeError at/不可哈希类型

这基本上是因为我使用字典作为对象而不是查询集.我想知道是否有办法将我的字典变成可散列对象.

这是我在模板中的字典:

{% for key, values in prodmatrix.items %} 
<div class="product-box"><span class="sale_tag"></span><p><a href="{% url 'product_detail' slug=values.3.0 %}"><img src="{{ STATIC_URL }}{{values.1.0}}" alt=""/></a></p><a href="{% url 'product_detail' slug=values.3.0 %}" class="title"><h4>{{ values.0.0 }}</h4></a><br/><p class="category"><a href="{% url 'product_detail' slug=values.3.0 %}">{{values.2.}} {{values.2.1}} {{values.2.2}}</a></p>

{% 结束为 %}

这是我的观点:

def home(请求):如果 request.user.is_authenticated():打印登录"用户 = request.userprods = Product.objects.all()我 = 0打印 'numero de produtos' + str(len(prods))前矩阵 = {}对于 prod 中的 prod:# 0 1 2 3prodmatrix[str(i)] = [[prod.name], [prod.image], [], [prod.slug]]评论 = Review.objects.filter(product=prod.id) # ^ 这是标签打印 str(len(评论))如果 len(评论) != 0:在评论中查看:rev_alltags = review.tag.all()对于 rev_alltags[:3] 中的标签:#打印标签.nameprodmatrix[str(i)][2].append(tags.name) # 只附加标签打印 str(i)我 = 我 + 1paginator = Paginator(prodmatrix, 2)page = request.GET.get('page')尝试:prodmatrix2 = paginator.page(page)除了 PageNotAnInteger:prodmatrix2 = paginator.page(1)除了 EmptyPage:prodmatrix2 = paginator.page(paginator.num_page)返回渲染(请求，'home.html'，{'prodmatrix2':prodmatrix})

解决方案

使用tuple代替dict，像这样:

# 将 `dict` 转换为 `tuple`:prodmatrix = 元组(prodmatrix)paginator = Paginator(prodmatrix, 2)# 或这个paginator = Paginator(prodmatrix.items(), 2)page = request.GET.get('page')尝试:prodmatrix2 = paginator.page(page)除了 PageNotAnInteger:prodmatrix2 = paginator.page(1)除了 EmptyPage:prodmatrix2 = paginator.page(paginator.num_page)返回渲染(请求，'home.html'，{'prodmatrix2':prodmatrix})

在你的模板中，你需要通过元组的索引 (key=0, value=1) 调用 attrs 和方法

I'm trying to use Django pagination Pagination Docs. But I'm receiving this error:

TypeError at /
unhashable type

Which is basically because I'm using a dictionary as my object and not a queryset. I would like to know if there is a way to turn my dictionary a hashable object.

This is my dict in template:

{% for key, values in prodmatrix.items %}                                                                                                     <li class="span3">
<div class="product-box">
<span class="sale_tag"></span>
<p><a href="{% url 'product_detail' slug=values.3.0 %}"><img src="{{ STATIC_URL }}{{values.1.0}}" alt="" /></a></p>
    <a href="{% url 'product_detail' slug=values.3.0 %}" class="title"><h4>{{ values.0.0 }}</h4></a><br/>
    <p class="category"><a href="{% url 'product_detail' slug=values.3.0 %}">{{values.2.}}    {{values.2.1}}   {{values.2.2}}</a></p>
</div>
</li>
{% endfor %}

This is my view:

def home(request):
    if request.user.is_authenticated():
        print "login"
        user = request.user
        prods = Product.objects.all()

        i = 0
        print 'numero de produtos ' + str(len(prods))
        prodmatrix = {}
        for prod in prods:
            #                       0             1           2    3
            prodmatrix[str(i)] = [[prod.name], [prod.image], [], [prod.slug]] 
            reviews = Review.objects.filter(product=prod.id) #   ^ this is for tags
            print str(len(reviews))
            if len(reviews) != 0: 
                for review in reviews:
                    rev_alltags = review.tag.all()
                    for tags in rev_alltags[:3]:     #                           
                        print tags.name
                        prodmatrix[str(i)][2].append(tags.name) # append only tags 
            print str(i)
            i = i + 1
        paginator = Paginator(prodmatrix, 2)
        page = request.GET.get('page')
        try:
            prodmatrix2 = paginator.page(page)
        except PageNotAnInteger:
            prodmatrix2 = paginator.page(1)
        except EmptyPage:
            prodmatrix2 = paginator.page(paginator.num_page)
        return render(request, 'home.html',{'prodmatrix2':prodmatrix})

解决方案

Use tuple instead dict, like this:

# convert `dict` to `tuple`:
prodmatrix = tuple(prodmatrix)
paginator = Paginator(prodmatrix, 2)
# or this
paginator = Paginator(prodmatrix.items(), 2)

page = request.GET.get('page')
try:
    prodmatrix2 = paginator.page(page)
except PageNotAnInteger:
    prodmatrix2 = paginator.page(1)
except EmptyPage:
    prodmatrix2 = paginator.page(paginator.num_page)
return render(request, 'home.html',{'prodmatrix2':prodmatrix})

And in you template, you need call the attrs and method by index of tuple (key=0, value=1)

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