Python 从Django获取JSON响应
编辑: 如前所述,我试图获得的东西如下: 使用视图中的“来自模板的文件-->文件”过程发布,生成一个id-->id显示在模板中 我是Django的新手,我正在尝试让服务器向同一页面发送一个响应,带有特定的数字。它当前正在响应ValueError,而模板没有得到响应。这是我的密码 views.pyPython 从Django获取JSON响应,python,json,django,dropzone.js,Python,Json,Django,Dropzone.js,编辑: 如前所述,我试图获得的东西如下: 使用视图中的“来自模板的文件-->文件”过程发布,生成一个id-->id显示在模板中 我是Django的新手,我正在尝试让服务器向同一页面发送一个响应,带有特定的数字。它当前正在响应ValueError,而模板没有得到响应。这是我的密码 views.py def index(request): dB = LegacyDatabase() ints = None if request.POST: form = UploadFileForm(requ
def index(request):
dB = LegacyDatabase()
ints = None
if request.POST:
form = UploadFileForm(request.POST, request.FILES)
if form.is_valid():
files = Upload(model=request.FILES['file_upload'])
try:
ints = dBconnection(dB, request.FILES['file_upload'].name)
except IntegrityError:
ints = dBGetExistingValue(dB, request.FILES['file_upload'].name)
files.save()
a = []
a.append(["sessionid", ints])
sess= dict(a)
return JsonResponse(sess)
return render(request, "main/index.html")
url.py
从django.conf.url导入url
from phast.views import index
urlpatterns = [
url(r'^$', index, name='main'),
]
index.html
<form method="post" class = "sessionid">
<input type="text" id = "demo" readonly>
</form>
<script>
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
console.log(JSON.parse(xhttp.responseText));
}
};
</script>
<form class="dropzone" id="mydropzone" enctype="multipart/form-data"> {% csrf_token %} </form>
你能帮帮我吗
编辑:
如所问,下面是开发服务器返回的错误
Internal Server Error: /
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/exception.py", line 39, in inner
response = get_response(request)
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/rubinhus/Development/django/phastload/phast/views.py", line 66, in index
return render(request, "main/index.html", JsonResponse(sess))
File "/usr/local/lib/python2.7/dist-packages/django/shortcuts.py", line 30, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader.py", line 68, in render_to_string
return template.render(context, request)
File "/usr/local/lib/python2.7/dist-packages/django/template/backends/django.py", line 64, in render
context = make_context(context, request, autoescape=self.backend.engine.autoescape)
File "/usr/local/lib/python2.7/dist-packages/django/template/context.py", line 267, in make_context
context.push(original_context)
File "/usr/local/lib/python2.7/dist-packages/django/template/context.py", line 59, in push
return ContextDict(self, *dicts, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/template/context.py", line 18, in __init__
super(ContextDict, self).__init__(*args, **kwargs)
ValueError: dictionary update sequence element #0 has length 19; 2 is required
据我所见:
回溯在views.py的第66行中显示:
返回呈现(请求“main/index.html”,JsonResponse(sess))
这是代码的最后一行,其余都是django内置的。所以你应该专注于这一行
我的方法是检查views.py的第66行并调试那里发生的事情。如果在views.py的第66行中没有看到类似的代码,我打赌您还没有重新启动django进程。你是如何运行服务器的?如果任何进程正在监视它,请重新启动该进程
编辑
如果提供了上下文,则必须是dict。如果未提供上下文,引擎将使用空上下文呈现模板
您向它提供了一个JsonResponse
。它是一个响应,它将包含请求的状态代码、标题和正文
因此,将
return JsonResponse(sess)
替换为render(request,“main/index.html”,context=sess)
应该可以工作。如果您遇到错误,应该将其与完整的回溯一起发布。不过,我想知道为什么您认为会有一个名为“file\u upload”的字段在POST数据中。模板中的Dropzone的名称。我的想法是POST数据引用了上传的文件,如果这不正确,请解释一下?不管是哪种方式,追踪都是后发的什么“Dropzone”?这是你第一次提到它。另外请注意,回溯的第十行显示错误发生在与您发布的代码不同的代码中。如果您不显示实际代码,我们可能无法帮助您。webapp应该从dropzone获取一个文件,将其上载到服务器,然后视图将处理文件名,在数据库中输入文件名和id,并将id作为json响应返回。错误现在已纠正。谢谢你在问题结构中的输入,我是新来的。谢谢。我已经用其他评论的反馈编辑了代码。现在是正确的,但是模板没有收到响应我不明白模板的哪一部分没有收到响应。也许你应该重新组织你的问题,增加更多的具体性。您是否正在尝试实现以下目标:获取请求-->模板-->显示空表单POST请求-->模板-->显示已发布的数据我已经编辑了帖子,请查看它是否已清除。然后将if request.POST
替换为if request.method='POST'
。然后在if循环内的返回中,执行而不是returnjsonresponse(sess)
替换为returnrender(请求,“main/index.html”,context=sess)
。检查我编辑的答案。
Internal Server Error: /
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/exception.py", line 39, in inner
response = get_response(request)
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/rubinhus/Development/django/phastload/phast/views.py", line 66, in index
return render(request, "main/index.html", JsonResponse(sess))
File "/usr/local/lib/python2.7/dist-packages/django/shortcuts.py", line 30, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "/usr/local/lib/python2.7/dist-packages/django/template/loader.py", line 68, in render_to_string
return template.render(context, request)
File "/usr/local/lib/python2.7/dist-packages/django/template/backends/django.py", line 64, in render
context = make_context(context, request, autoescape=self.backend.engine.autoescape)
File "/usr/local/lib/python2.7/dist-packages/django/template/context.py", line 267, in make_context
context.push(original_context)
File "/usr/local/lib/python2.7/dist-packages/django/template/context.py", line 59, in push
return ContextDict(self, *dicts, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/template/context.py", line 18, in __init__
super(ContextDict, self).__init__(*args, **kwargs)
ValueError: dictionary update sequence element #0 has length 19; 2 is required