Python TemplateSyntaxError: 预期标记 ':'，得到 '}'
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TemplateSyntaxError: expected token ':', got '}'
提问by Louie Cubero
This is my source code:
这是我的源代码：
<ul class="filebase">
{% for file in finance %}
<li class="filelist">
<div class="file-author"><a href="http://127.0.0.1:5000/uploads/files/{{file. filename}}">{{ file.filename }}</a></div>
<div class="file-body">Description: {{ file.description }}</div>
<div class="file-date">Date posted: {{ moment(file.date).fromNow() }}</div>
<div class="delete-file"><a href="{{ url_for('.delete_file', file_name={{ file.filename }} ) }}">Delete File</a></div><br>
</li>
{% endfor %}
At first, my code was working, suddenly I got an error like this:
起初，我的代码正在运行，突然出现这样的错误：
TemplateSyntaxError: expected token ':', got '}'
TemplateSyntaxError: 预期标记 ':'，得到 '}'
Here's my Traceback (If you need):
这是我的回溯（如果需要）：
Traceback (most recent call last):
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask_login.py", line 758, in decorated_view
return func(*args, **kwargs)
File "C:\Users\LouieCubero\Documents\GitHub\Flasky4\app\main\views.py", line 172, in list_of_finance
return render_template('_filebase.html', finance = finance)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\flask\templating.py", line 127, in render_template
return _render(ctx.app.jinja_env.get_or_select_template(template_name_or_list),
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\jinja2\environment.py", line 830, in get_or_select_template
return self.get_template(template_name_or_list, parent, globals)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\jinja2\environment.py", line 791, in get_template
return self._load_template(name, self.make_globals(globals))
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\jinja2\environment.py", line 765, in _load_template
template = self.loader.load(self, name, globals)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\jinja2\loaders.py", line 125, in load
code = environment.compile(source, name, filename)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\jinja2\environment.py", line 554, in compile
self.handle_exception(exc_info, source_hint=source)
File "C:\Users\LouieCubero\Documents\GitHub\flasky\venv\lib\site-packages\jinja2\environment.py", line 742, in handle_exception
reraise(exc_type, exc_value, tb)
File "C:\Users\LouieCubero\Documents\GitHub\Flasky4\app\templates\_filebase.html", line 8, in template
<div class="delete-file"><a href="{{ url_for('.delete_file', file_name={{ file.filename }} ) }}">Delete File</a></div><br>
TemplateSyntaxError: expected token ':', got '}'
Thanks for the help!
谢谢您的帮助！
回答by curious
<div class="delete-file"><a href="{{ url_for('.delete_file', file_name={{ file.filename }} ) }}">Delete File</a></div><br>You cannot call a function directly from django template like above. Write custom template tags to satify your purpose.
您不能像上面那样直接从 django 模板调用函数。编写自定义模板标签以满足您的目的。
refer django documentation: https://docs.djangoproject.com/en/1.7/howto/custom-template-tags/or a userful thread in stackoverflow itself. How to call function that takes an argument in a Django template?
请参阅 django 文档： https://docs.djangoproject.com/en/1.7/howto/custom-template-tags/ 或 stackoverflow 本身中的有用线程。 如何调用在 Django 模板中接受参数的函数？
回答by JakeJ
Don't do more {{}} inside of other {{}} blocks.
不要在其他 {{}} 块内做更多的 {{}}。
Here's my url_for() call:
这是我的 url_for() 调用：
<a href="{{ url_for('viewBlog', userid=item.userid)}}"></a>
I was getting that same error when it looked like this:
当它看起来像这样时，我遇到了同样的错误：
<a href="{{ url_for('viewBlog', userid={{item.userid}}) }}"></a>
Once I removed the inner {{}}, the problem went away.
一旦我删除了内部 {{}}，问题就消失了。
