jinja2 Custom filter“TemplateAssertionError:no filter named'format_number'” [英] jinja2 Custom filter "TemplateAssertionError: no filter named 'format_number'"
问题描述
当尝试通过更新环境中的过滤器字典来在模板环境中注册自定义过滤器时,出现 TemplateAssertionError:没有名为format_number的过滤器错误。
在我的模块中,我已经导入了环境模块,如下所示:
from jinja2导入环境
在我的类中,我定义了以下方法:
class DashboardHandler(SecurePageHandler):
$ b $ def format_number(number):
s ='%d'%number
groups = []
而s和s [-1] .isdigit():
groups.append(s [-3:])
s = s [: - 3]
(self):
... ... snip ...
env = environment.Environment( self)
env.filters ['format_number'] = self.format_number
#... snip ...
在我的html模板文件中,我尝试按如下方式实现过滤器:
{{top_five_url .total | format_number}}
这是怎么发生的?
更新
是否有默认环境实例,我们应该使用?
已解决
在模块内部,我定义了我的方法并更新了过滤器字典全局如下: 我可以按照以下方式解决我的问题, 在模块内部,我定义了我的方法并全局地更新了过滤器字典,如下所示: I'm getting the "TemplateAssertionError: no filter named 'format_number'" error, when trying to register a custom filter on the template environment by updating the filters dict on the environment. In my module, I have imported environment module as follows: In my class I defined the following method: Inside my html template file I tried to implement the filter as follows: How is this happening? Update Is there a default environment instance, we should use? Resolved Inside the module, I defined my method and updated the filters dictionary globally as follows:
I could resolve my problem as follow, Inside the module, I defined my method and updated the filters dictionary globally as follows:
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$ $ p $ code $ import $ $
$ b $格式编号
s = %d $%$
groups = []
while s and s [-1] .isdigit():
groups.append(s [-3:])
s = s [: - 3]
return s +','。join(reversed(groups))
jinja2.filters.FILTERS ['format_number'] = format_number
import jinja2
def format_number(number):
s ='%d'%number
groups = []
while s and s [-1] .isdigit():
groups.append(s [-3:])
s = s [: - 3]
return s +','。join(reversed(groups))
jinja2.filters.FILTERS ['format_number'] = format_number
from jinja2 import environment
class DashboardHandler(SecurePageHandler):
def format_number(number):
s = '%d' % number
groups = []
while s and s[-1].isdigit():
groups.append(s[-3:])
s = s[:-3]
return s + ','.join(reversed(groups))
def do_get(self):
# ... snip ...
env = environment.Environment(self)
env.filters['format_number'] = self.format_number
# ... snip ...
{{top_five_url .total|format_number}}
import jinja2
def format_number(number):
s = '%d' % number
groups = []
while s and s[-1].isdigit():
groups.append(s[-3:])
s = s[:-3]
return s + ','.join(reversed(groups))
jinja2.filters.FILTERS['format_number'] = format_number
import jinja2
def format_number(number):
s = '%d' % number
groups = []
while s and s[-1].isdigit():
groups.append(s[-3:])
s = s[:-3]
return s + ','.join(reversed(groups))
jinja2.filters.FILTERS['format_number'] = format_number