Hi
Yeah I see.
I tried it out just after writing, with little success, but without the
.values() I do still have the {{ data.field_name }} available which Is
probably more usefull than actually iterating over a dataset regardless of
content.
Still the relationsships are only available as forwards and backwards
relations on instances, right? Which, if I understand you correctly I only
get when omitting the .get() method.
I probably should have started out with a Python tutorial before jumping in
to django :) Well, no pain no gain I guess.
thanks by the way.
Den onsdag den 18. september 2013 20.14.47 UTC+2 skrev Daniel Roseman:
>
> Well, not quite. That will work if you just omit .get(), because then
> you'll have a ValuesQuerySet - basically, a list of dicts. However, if you
> omit .values() as well you'll have a plain old QuerySet - ie a list of
> model instances - and those instances aren't dicts and don't have an
> .items() method. There's not really a good way of iterating over all the
> fields in an instance with their names (you can muck about with the stuff
> in _meta, but I wouldn't recommend it).
>
> As I say though, in practice that's rarely a problem as you usually want
> to reference individual fields by name, rather than iterating over them.
> --
> DR.
>
>
> On Wednesday, 18 September 2013 16:39:34 UTC+1, Johan Bergkvist wrote:
>>
>> Hi, thanks - that provides some perspective.
>>
>> So if I omitted the .get() and .values() i will have to loop over the
>> queryset and then each dict, doing something like:
>>
>> {% for q in info %}
>> {% for k, v in q.items %}
>> {{ k }} {{ v}}
>> {% empty %}
>> no data
>> {% endfor %}
>> {%endfor%}
>> ?
>>
>>
>>
>>
>> Den onsdag den 18. september 2013 00.02.21 UTC+2 skrev Daniel Roseman:
>>>
>>> Without the get(), you get a queryset, which is an iterable of all
>>> elements that match the query - in effect, a list of dicts. Even though
>>> only one record matches, you still get a queryset containing a single dict.
>>> So in order to use that in your template, you'd have to add an outer loop
>>> iterating through each item in the queryset, while the inner loop iterates
>>> over the elements in each dict.
>>>
>>> Reverse relations work with a model instance. But you don't have one of
>>> those - you've got a dict, because you used .values(). If you dropped that
>>> call, you'd have an instance which you could use the backwards relation on,
>>> but you wouldn't be able to iterate over the fields with .items(). Note
>>> that most of the time you don't need to do that, so mostly you would use
>>> the instance rather than calling .values().
>>>
>>> --
>>> DR.
>>>
>>>
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