/ app /处的OSError为什么会发生这种奇怪的错误？
[英]OSError at /app/ Why does such a strange error happen?
问题描述
I got an error: 
我收到一个错误：
OSError at /app/
[Errno 63] File name too long: "/Users/xxx/testapp/templates/jinja2/{'items': [{'---': '---', 'A': 'a', 'B': 'b', 'C: 'c', 'D': 'd'}]}
I wanna embed json_dict of json_parse method's result in views.py to index.html . 我想将json_dict方法的结果的json_dict嵌入到index.html views.py中。 I wrote in views.py like 我在views.py写道
from django.shortcuts import render
import json
def index(request):
f = open('./data/data.json', 'r')
json_dict = json.load(f)
return render('./index.html',json_dict)
I wrote in index.html like 我在index.html中这样写
<html>
<head>
<script type="text/javascript" src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/chosen/1.8.2/chosen.jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/chosen/1.4.2/chosen.jquery.js"></script>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/chosen/1.4.2/chosen.css">
</head>
<body>
<select id="mainDD" data-placeholder="Choose" class="chzn-select" style="width:600px;">
{% for k, v in json_dict.items %}
<option>{{ v }}</option>
{% endfor %}
</select>
</body>
</html>
json_dict has dictionary of {'items': [{'---': '---' ~~~ .I really cannot understand why I cannot send json_dict to index.html . json_dict有{'items': [{'---': '---' ~~~字典。我真的不明白为什么我不能将json_dict发送到index.html 。 Am I wrong to use render method? 使用渲染方法会出错吗？ How can I fix this? 我怎样才能解决这个问题？
urls.py of app(child app) has views.py&index.html is 应用程序（子应用程序）的urls.py具有views.py＆index.html是
from django.conf.urls import url
from . import views
urlpatterns = [
url(r'^$', views.index, name='index'),
]
urls.py of parent app is 父应用的urls.py是
from django.conf.urls import include, url
from django.contrib import admin
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^app/', include('app.urls')),
]
Traceback is 追溯是
Traceback:
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/exception.py" in inner
41. response = get_response(request)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/xxx/testapp/app/views.py" in index
8. return render('./index.html',json_dict)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/shortcuts.py" in render
30. content = loader.render_to_string(template_name, context, request, using=using)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/loader.py" in render_to_string
67. template = get_template(template_name, using=using)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/loader.py" in get_template
21. return engine.get_template(template_name)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/backends/django.py" in get_template
39. return Template(self.engine.get_template(template_name), self)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/engine.py" in get_template
162. template, origin = self.find_template(template_name)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/engine.py" in find_template
136. name, template_dirs=dirs, skip=skip,
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/loaders/base.py" in get_template
38. contents = self.get_contents(origin)
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/loaders/filesystem.py" in get_contents
28. with io.open(origin.name, encoding=self.engine.file_charset) as fp:
Exception Type: OSError at /app/
Exception Value: [Errno 63] File name too long: "/Users/xxx/testapp/templates/jinja2/{'items': [{'---': '---', ‘A’: ‘a’, ‘B’: ‘b’, ‘C: ‘c’, ‘D’: ‘d’}]}
After editing by an answer,I got an error TypeError at /app/ init () got an unexpected keyword argument 'match_extension' . 通过答案进行编辑后，我在/ app / init （）处收到错误TypeError，得到了意外的关键字参数'match_extension'。 Traceback says Traceback: 追溯说追溯：
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/utils.py" in getitem 65. return self._engines[alias] getitem 65中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/template/utils.py”。return self._engines [alias]
During handling of the above exception ('django'), another exception occurred: 在处理上述异常（“ django”）期间，发生了另一个异常：
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/exception.py" in inner 41. response = get_response(request) 内部文件41中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/exception.py”。response = get_response（request）
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response 187. response = self.process_exception_by_middleware(e, request) _get_response 187中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/base.py”。response = self.process_exception_by_middleware（e，请求）
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response 185. response = wrapped_callback(request, *callback_args, **callback_kwargs) _get_response 185中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/core/handlers/base.py”。response = wraped_callback（request，* callback_args，** callback_kwargs）
File "/Users/xxx/testapp/app/views.py" in index 13. return render(request, 'jinja2/index.html', {'json_dict': json_dict}) 索引13中的文件“ /Users/xxx/testapp/app/views.py”。return render（request，'jinja2 / index.html'，{'json_dict'：json_dict}）
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/shortcuts.py" in render 30. content = loader.render_to_string(template_name, context, request, using=using) 渲染30中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/shortcuts.py”。content = loader.render_to_string（template_name，context，request，using = using）
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/loader.py" in render_to_string 67. template = get_template(template_name, using=using) render_to_string 67中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/template/loader.py”。template = get_template（template_name，using = using）
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/loader.py" in get_template 18. engines = _engine_list(using) get_template 18中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/template/loader.py”。engine = _engine_list（使用）
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/loader.py" in _engine_list 72. return engines.all() if using is None else [engines[using]] _engine_list 72中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/template/loader.py”。如果使用，则返回engine.all（）其他[engines [using]]
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/utils.py" in all 89. return [self[alias] for alias in self] 全部89个文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/template/utils.py”。返回[self [alias]为self中的别名]
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/utils.py" in 89. return [self[alias] for alias in self] 89中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/template/utils.py”。返回[self [alias]为self中的别名]
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/utils.py" in getitem 80. engine = engine_cls(params) 在getitem 80中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/template/utils.py”。engine = engine_cls（params）
File "/Users/xxx/myenv/lib/python3.5/site-packages/django/template/backends/django.py" in init 32. self.engine = Engine(self.dirs, self.app_dirs, **options) 初始化 32中的文件“ /Users/xxx/myenv/lib/python3.5/site-packages/django/template/backends/django.py”。self.engine = Engine（self.dirs，self.app_dirs，** options ）
Exception Type: TypeError at /app/ Exception Value: init () got an unexpected keyword argument 'match_extension' 异常类型：/ app /处的TypeError异常值： init （）获得了意外的关键字参数'match_extension'
1 个解决方案
解决方案1
1 已采纳 2017-09-25 08:55:52
Your call to render() is wrong, try this : 您对render()调用是错误的，请尝试以下操作：
def index(request):
with open('./data/data.json', 'r') as f:
json_dict = json.loads(f.read())
return render(request, 'index.html', {'json_dict': json_dict})
Everything is in the doc : 一切都在文档中：
https://docs.djangoproject.com/en/1.11/topics/http/shortcuts/#render https://docs.djangoproject.com/en/1.11/topics/http/shortcuts/#render
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