Question

我正在尝试通过它的id来检索另一个视图中的Instance对象，该id已经被模板中的隐藏输入字段传递，但无法获取该对象。

这是我的文件：

BuildImage.html

{% block content %}
<form class="form-horizontal" method="POST" id="dockerForm">
                    {% csrf_token %}
                    <fieldset>
                        <div class="form-group">
                            <span class="col-md-1 col-md-offset-2 text-center"><i class="fa fa-user bigicon"></i><label for="package">Docker Image Tag Name:</label></span>
                            <div class="col-md-8">
                                <input  type="text" name="tagName"  id="tagName" placeholder="e.g node_image/istiogui" class="form-control" required>
                                <input type="hidden" id="id" name="id" value="{{ id }}">
                            </div>
                        </div>
                        <div class="form-group">
                            <div class="col-xl-12 text-center">
                                <button type="button" class="btn btn-primary btn-info"><a href="/gui" style="color:white">Back</a></button>
                                <button type="submit" class="btn btn-primary btn-info">Build</button>
                            </div>
                        </div>
                    </fieldset>
</form>

{{id}}正在运作，因为我已将其放置在此模板中的其他位置。

models.py

class Instance(models.Model):
    id = models.AutoField(primary_key=True)
    user = models.ForeignKey(User, related_name='instances')
    name = models.CharField(max_length=255)
    serverFile = models.TextField(default='', blank=False)
    jsonPackageFile = models.TextField(default='', blank=False)
    created_at = models.DateTimeField(default=timezone.now, editable=False)

class Meta:
    ordering = ['-created_at']


class ImageModel(models.Model):
    tagName = models.CharField(max_length=255)
    id = models.ForeignKey(Instance, primary_key=True)

views.py

class BuildImage(LoginRequiredMixin, CreateView):
def get(self, request, *args, **kwargs):
    return render(request, 'instances/BuildImage.html', {})

def post(self, request, *args, **kwargs):
    if request.method == 'POST':
        pathlib.Path("mydir").mkdir(parents=True, exist_ok=True)
        dockerfile = """ 
        FROM node
        # Create app directory
        RUN mkdir -p /usr/src/app
        WORKDIR /usr/src/ap

        # Install app dependencies
        COPY package.json /usr/src/app/
        RUN npm install

        # Bundle app source
        COPY . /usr/src/app

        EXPOSE 8080
        CMD [ "npm", "start" ]"""
        cFile = open("mydir/dockerfile", "w")
        cFile.write(dockerfile)
        cFile.close()
        the_form = forms.BuildImageForm(request.POST)
        if the_form.is_valid():
            data = the_form.cleaned_data
            instance_id = data['id']
            obj = Instance.objects.all(id=str(instance_id))
            title = obj.name
            code = obj.serverFile
            package = obj.jsonPackageFile
            cFile = open("mydir/"+ title, "w")
            cFile.write(code)
            cFile.close()
            cFile = open("mydir/package.json", "w")
            cFile.write(package)
            cFile.close()
    return HttpResponse(status=200)

urls.py

urlpatterns = [
url(r'^create/$', views.CreateInstance.as_view(), name='create'),
url(r'^buildImage/$', views.BuildImage.as_view(), name='buildImage'),
]

Answer 1

在您看来尝试更改此行，

obj = Instance.objects.get(id=int(instance_id))

通过django中的id字段检索数据库对象

1 个答案: