Question

我尝试实现一个允许用户查找特定广告的查询表单，我在shell中花了一些时间，所以我可以在views.py中编写该函数但是有些错误，因为我没有得到任何结果我的模板。

models.py

from django.db import models
from user.models import User

class Ads(models.Model):
    name = models.CharField(max_length=30, unique=True, blank=False) #I added an object called 'apple'

    def __str__(self):
        return self.name

class Offer(models.Model):
    publisher = models.ForeignKey(User)
    content = models.TextField()
    ads = models.ManyToManyField(Ads)

    def __str__(self):
        return self.content

forms.py

class SendOfferForm(forms.ModelForm):
    courses = forms.ModelChoiceField(queryset=Course.objects.all())
    class Meta:
        model = Offer
        fields = ('ads', 'content')
        labels = {
            'content': _("write your ads here"),
            'ads': _("ads-number"), # TODO the label does'nt show up in the template
        }

class QueryForm(forms.ModelForm):
    ads = forms.ModelChoiceField(queryset=Course.objects.all(), required=False)
    def __init__(self, *args, **kwargs):
        super(QueryForm, self).__init__(*args, **kwargs)
        self.fields['content'].required = False
    class Meta:
        model = Offer
        fields = ('ads', 'content')

views.py

def search(request):
    try:
        logged_user = get_logged_user_from_request(request)
    except:
        pass
    if request.method=='GET':
        form = QueryForm(request.GET)
        results = None
        if form.is_valid():
            query_content = request.GET.get('id_content')
            if query_content:
                results = Offer.objects.filter(content__contains=query_content)
    else:
        form = QueryForm()
    return render(request, 'offers/search.html', locals())

模板

    <form id="login_form" method='GET' action="{% url "search" %}"> 
        {% csrf_token %}
        {{ form.as_p }}
            <p>
                <input type="submit" value="chercher" />
            </p>        
    </form>

search.html

{% if results %}
{% for result in results %}
    <div class="result">
        <p>{{ result.content }}</p>
        <p>{{ result.cours.name }}</p>
    </div>

{% empty %}

    <p>No ads, sorry</p>  <!--TODO this is always showing up -->

{% endfor %}
{% elif results == None %}
<p>No ads, sorry</p>
{% endif %}

最后，这是我在shell中编写的查询

Offer.objects.filter(content__contains='apple')
[<Offer: a>, <Offer: a>]

那是在这里工作但是

results = Offer.objects.filter(content__contains='apple')
result = result[0]
result
<Offer: a>     # the user is called 'a', I was a bit lazy to create a real exemple of user ^^

res.content
'I'm an ads called apple'
res.ads
<django.db.models.fields.related.create_many_related_manager.<locals>.ManyRelatedManager object at 0x7fdf5231deb8>
res.ads.name
print(res.ads.name)
None

通常情况下，当我搜索＆＃39; apple＆＃39;时，我可以看到内容。但我的模板中没有任何内容。另外，我可以看到我甚至无法获得广告的名称。根据管理员的说法，它不是无，它是苹果。我负责编写以下代码以保存m2m关系的对象：

    if offerform.is_valid():        
        sent = True
        offer = offerform.save(commit=False)
        offer.publisher = User.objects.get(id=logged_user.id)
        offer.save()
        offerform.save_m2m()

Answer 1

您不应该使用locals()将上下文返回给模板。在您的情况下，form.is_valid()可能是False，results仍为None。此外，如果其他人试图阅读您的代码，除非他们通过整个查看方法，否则他们无法弄清楚您的上下文中的内容。

查询集在shell中工作但不是

1 个答案: