Django selected value
webmam...@gmail.com
my models.py :
class Model2(models.Model):
.............................................................................
choice_field = models.ManyToManyField(to=Model1)
....................................................................................
class Model2Form(ModelForm):
class Meta:
model = Model2
fields = ['choice_field']
.............................................................................my views.py:
def myfunc(request):
form = Model2Form()
if request.method == 'POST':
form1 = Model2Form(request.POST)
if form1.is_valid():
form1.save()
return ......................................................................................
myquery = Model2.objects.values('choice_field').last()In template.html when I try {{ myquery.choice_field }} - i get {'choice_field': 5}. How can I get a name of currently selected choice_field item and/or value of currently selected choice_field item?
James Schneider
On Jul 23, 2016 10:46 AM, <webmam...@gmail.com> wrote:
>
> How to get value/name of currently selected drop box item?
>
Careful how you phrase that question. When it comes to forms, the name and value are two different things.
Because you are using values() to populate myquery, it won't contain any information except for the fields contained in values(). Typically you'd pull the full Model2 objects (remove the values() portion) and just access whatever attribute you'd need in the template, rather than just pulling the values. The alternative would be to add whatever fields you need to your values() call.
-James
webmam...@gmail.com
I was try:
Model2.objects.order_by('choice_field')
Model2.objects.values('choice_field')
Model2.objects.values_list('choice_field')
Model2.objects.all()
I can`t get - as value of selected item - such as name of selected item
When i save model - selected item saved and I see selected item in drop box. How to get anything from this drop box instead {'choice_field': 5}?
Now I try all queryset methods - on this time - nothing.
James Schneider
I'm confused about what you are trying to accomplish.
Are you trying to get the name of a field within the template after the user makes a selection but before they submit?
Are you trying to see something within the view after they submit? Do you want the name (field identifier), display value (what the user sees), or the value they selected?
The view you provided is incomplete at best. Please provide the view and template you are working with.
-James
Volodymyr Kirichinets
Shem Geek
Had a similar problem today, other than using django forms, ensure your select box is named, wen the selct box is named, the selected value witll have the name of the select box:
example:
<select name='myoptions'>
<option value='val1'> option 1 </option>
<option value='val2'> option 2</option>
</select>
in django after posting the form:
you cant get the value by.
selected_opt = request.POST['myoptions']
Volodymyr Kirichinets
Thanks for Your interest,
But I solved this in more flexible and convenient model.(without requests, get selected options and other).
I use now ManyToManyField and this solve many problems.
Thanks for Your interest. I invite You to Python Dnipro, Django Dnipro, Pyramid Dnipro - Google Groups,
If You interested - add this groups.
Sincerely,
Volodymyr
Sergiy Khohlov
Many to many fields are not good due to performance issues. It is not important for small Db but for big it is a problem.
Simplest way for understanding form is a adding debug print(form)inside your views get function.
Next step is turning off form autocommit, update your form fields and save it.
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Volodymyr Kirichinets
Я не знаю какие там проблемы с большой базой, но моя база тоже не маленькая.
И к тому же у меня задачи которые не решить без ManyToManyField - другие не подходят и вызывают еще больше проблем. Я вызываю данные с моделей и заполняю модели, так что акцент на формах тут неуместен.