RE: Use self-increasing arguments in numeric for-loop in Django

[Matthew Pava]

You have a list of values.  Use the Pythonic way to iterating over a list, 
which does not involve using indices.

{% for o in graphobject %}
                {{ o }}<br />
                {{ o.subfield }}
{% endfor %}


From: django-users@googlegroups.com [mailto:django-users@googlegroups.com] On 
Behalf Of Bill Torcaso
Sent: Friday, April 20, 2018 8:50 AM
To: Django users
Subject: Re: Use self-increasing arguments in numeric for-loop in Django


I an new-ish to Django, and I ask this to hear from more experienced users 
whether this would work at all, and whether it would be considered a good or 
bad practice.

Goal: given an object and an integer index, retrieve the sub-object at that 
index within the incoming object.

Method:  Write a custom tag.  Provide the tag with the larger object, and the 
integer index.  Return the sub-object at that index (or whatever field(s) are 
needed).

Usage:


  {% for i in metarange %}

    {% graphobject_get_by_index graphobject {{ i }} %}

  {% endfor %}


In this particular case, there is an issue about whether the sub-object can be 
null, for some definition of null.  There are various ways to deal with that.

Again, I am new-ish to Django.  Is there a similar approach in which 
'get_by_index' is a method on class Graphobject, such that this would work?

    {% graphobject.get_by_index {{ i }} %}

Thanks for any explanation about these approaches.


On Thursday, April 19, 2018 at 12:01:37 PM UTC-4, 
shaw...@gmail.com<mailto:shaw...@gmail.com> wrote:

I am currently working on django.

I have a list of values which stored in 'graphobject', and 'metarange' is 
defined as range(0,59). In that case, how could I use numbers as argument to 
display the value stored in graphobject? I tried using following codes but it 
doesn't work



{% for i in metarange %}

{% if graphobject.i != '' %}

{{ graphobject.i }}

{% endif %}

{% endfor %}



Please tell me how could I do this?
--
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to 
django-users+unsubscr...@googlegroups.com<mailto:django-users+unsubscr...@googlegroups.com>.
To post to this group, send email to 
django-users@googlegroups.com<mailto:django-users@googlegroups.com>.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/9c162dd2-201b-4370-bac0-f3afb3db163a%40googlegroups.com<https://groups.google.com/d/msgid/django-users/9c162dd2-201b-4370-bac0-f3afb3db163a%40googlegroups.com?utm_medium=email&utm_source=footer>.
For more options, visit https://groups.google.com/d/optout.

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/62ae273ee7634261ad5421b0809c28cc%40ISS1.ISS.LOCAL.
For more options, visit https://groups.google.com/d/optout.