django模板系统,在模型中调用函数 [英] django template system, calling a function inside a model
问题描述
我想从模型中调用一个函数,例如:
class ChannelStatus(models.Model):
..............................
............ ..................
def get_related_deltas(self,epk):
mystring =
如果不是自己。 get_error_code_delta(epk):
return mystring
else:
for i in self.get_listof_outage():
item = i.error_code.all()
for x in项目:
如果epk == x.id:
mystring = mystring ++ str(i.delta())
返回mystring
当我想从模板中调用它时:
假设在渲染时,我将channel_status_list作为
channel_status_list = ChannelStatus.objects.all()
{%for i in channel_status_list%}
{{i.get_related_deltas 3)}}
{%endfor%}
这不起作用,我可以调用一个没有任何东西的函数,但是如果它有参数,那么couln没有找到该怎么办p>
Cheers
您不能调用具有参数的函数模板。您只能在视图中执行此操作。或者,您可以编写自定义模板过滤器,可能如下所示:
@ register.filter
def related_deltas(obj,epk) :
return obj.get_related_deltas(epk)
所以现在你可以在模板中:
{%for i in channel_status_list%}
{{i | related_deltas:3}}
{%endfor%}
I want to call a function from my model at a template such as:
class ChannelStatus(models.Model):
..............................
..............................
def get_related_deltas(self,epk):
mystring = ""
if not self.get_error_code_delta(epk):
return mystring
else:
for i in self.get_listof_outage():
item = i.error_code.all()
for x in item:
if epk == x.id:
mystring= mystring +" "+str(i.delta())
return mystring
And when I want to call this from the template: assume while rendering, I pass channel_status_list as
channel_status_list = ChannelStatus.objects.all()
{% for i in channel_status_list %}
{{ i.get_related_deltas(3) }}
{% endfor %}
This doesn't work, I am able to call a function that consumes nothing, but couln't find what to do if it has parameter(s)
Cheers
You can't call a function with parameters from the template. You can only do this in the view. Alternatively you could write a custom template filter, which might look like this:
@register.filter
def related_deltas(obj, epk):
return obj.get_related_deltas(epk)
So now you can do this in the template:
{% for i in channel_status_list %}
{{ i|related_deltas:3 }}
{% endfor %}
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