Re: Conditionals in Templates

[Russ Abbott]

Here's a workaround I came up with.

I defined a class:

class TableValue:
def __init__(self, value):
self.value = value
self.is_list = isinstance(value, list)

Then in the Template I wrote


{% for row in rows %}

{% for cell in row %}

{% if cell.is_list %}

{% for element in cell.value %}
{{ element }}
{% endfor %}

{% else %}
{{ cell.value }}
{% endif %}

{% endfor %}

{% endfor %}


Is that considered decent Django?

On Tuesday, July 3, 2012 12:50:15 PM UTC-7, Russ Abbott wrote:
>
> I'm generating a table. I want the cells to be different depending on the 
> type of the content. How do I test for the type of the content? I'd like to 
> do something like this.
>
> 
> {% for row in rows %}
> 
> {% for cell in row %}
> 
> {% if isinstance( {{ cell }}, list) %}
> 
> {% for element in cell %}
> {{  element  }}
> {% endfor %}
> 
> {% else %}
> {{ cell }}
> {% endif %}
> 
> {% endfor %}
> 
> {% endfor %}
> 
>
> But "{% if isinstance( {{ cell }}, list) %}" is not allowed. Apparently I 
> can't call a function in an {% if ...  %} tag.  Is there another way to do 
> this?
>
> Thanks.
>

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Conditionals in Templates

[Russ Abbott]

I'm generating a table. I want the cells to be different depending on the 
type of the content. How do I test for the type of the content? I'd like to 
do something like this.


{% for row in rows %}

{% for cell in row %}

{% if isinstance( {{ cell }}, list) %}

{% for element in cell %}
{{  element  }}
{% endfor %}

{% else %}
{{ cell }}
{% endif %}

{% endfor %}

{% endfor %}


But "{% if isinstance( {{ cell }}, list) %}" is not allowed. Apparently I 
can't call a function in an {% if ...  %} tag.  Is there another way to do 
this?

Thanks.

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Newbie form question

[Russ Abbott]

As a Django newbie I apologize if this is a trivial question.

I'd like to use a form field as an element in a generated page but not as 
part of a form.  In particular, I'm generating a table, some of whose 
elements are text and others of which I want to be drop-down lists. I 
thought I might be able to use forms.ChoiceField to generate the drop-down 
lists.

When I write

...
choices = forms.ChoiceField([1, 2, 3]) # as a test case
...

I get a django.forms.fields.ChoiceField object. But when I include it as an 
element of the table nothing appears.  

Is this a reasonable approach? (It seems very easy if it really could be 
made to work.) If so, what should I do to get it to display as a drop-down 
list?

Thanks.

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