我查看了文档但找不到答案。这可能是我遗失的基本愚蠢行为。我有jinja2设置w /金字塔,我正在使用pyramid_jinja2并在我的.ini文件中设置我的过滤器:
jinja2.filters =
model_url = pyramid_jinja2.filters:model_url_filter
route_url = pyramid_jinja2.filters:route_url_filter
static_url = pyramid_jinja2.filters:static_url_filter
my_filter = myapp.view.my_filter
(my_filter只是将每个值乘以100) 这很好用:
@view_config(renderer="json",route_name="tester")
def tester(request):
myList = [1,2,3,4]
return render_to_response("templates/test.jinja2",{'myList':myList},request=request)
test.jinja2:
{% for l in myList %}
{{ l | my_filter }}
{% endfor %}
然而,这不是:
@view_config(renderer="json",route_name="tester")
def tester(request):
myList = [1,2,3,4]
tmplate = Template(u'''\
{% for l in myList %}
{{ l | my_filter }}
{% endfor %}
''')
html = tmplate.render(myList = myList)
return render_to_response("templates/test.jinja2",{'html':html},request=request)
test.jinja2:
{{ html | safe }}
我的错误讯息:
jinja2.exceptions.TemplateAssertionError
TemplateAssertionError: no filter named 'my_filter'
答案 0 :(得分:3)
因为您的模板未与环境相关联,所以您通常在哪里定义过滤器。模板类初始化创建自我环境,与主环境无关。
如果你想从字符串动态创建模板,并保留你的过滤器,需要这样的东西:
from jinja2 import Environment
env = Environment() # main environment, basically one per program.
env.filters['my_filter'] = lambda i: i * 100
template = env.from_string('{% for i in myList %}{{ i|my_filter }}_{% endfor %}')
print(template.render(myList=range(10)))
# 0_100_200_300_400_500_600_700_800_900_