Re: Form Relationships, Multiple Models Using a loop?

I think what I was looking for was inlineformsets. Easy enough i
suppose. We'll see. Anyone interested, see here:
http://docs.djangoproject.com/en/dev/topics/forms/modelforms/#inline-formsets

On Jun 16, 8:35 pm, Erich <efic...@gmail.com> wrote:
> First time poster, so go easy on me...
>
> I need to create a form that will display a heading / description that
> comes from one model (DReq) which I can get to display in a for loop.
> Each dreq.desc is dependent on the results of a var that gets set and
> read in from the user's session. Then I need to add a couple form
> fields (from Saq) to each one that will relate to dreq.req_number
> (also displayed alongside the desc) so that I can save the user's
> input to the db (the DReq and MSaq are related as a MTM through
> another model Saq).
>
> The best way I can figure out how to do this is to use some sort of
> for loop that will display each item and the respective form fields. I
> have gotten that far by going the template route (see below). My
> problem is that I do not know how to relate them to each other. Below
> is some of what I have come up with. If all else fails I will just
> create four (there are only four possible configurations for the form,
> but it seems like this would be more elegant in a loop, somehow
> relating them) individual forms to handle the task.
>
> Here is what I have come up with so far (I know this together doesn't
> work, it is just what I have tried in the various MTV places):
>
> forms.py:
>
> class MSForm(forms.Form):
>     answer = forms.Charfield(widget=forms.NullBooleanSelect)
>     note = forms.Charfield(widget=forms.TextArea)
> # Perhaps use a ModelForm?
> #    class Meta:
> #        model = DReq
> #        fields = [
> #            'answer',
> #            'note',
> #            ]
>
> views.py
>
> @login_required
> def saq(request):
>     current_saq = request.session.get('current_saq')
>     question = DReq.objects.filter(s_types=current_saq)
>
>     # Probably not the right place for the loop, but i was trying
> something different
>     for dreq in question:
>         if question.headline:
>             req_headline = question.headline
>         req_number = dreq.req_num
>         if dreq.needs_answer:
>             saq_form = MSForm()
>
>     if request.method == 'POST':
>         saq_form = MSForm(request.POST)
>
>         if saq_form.is_valid():
>             # Query that pulls the requirement and assigns the correct
> answer to it.
> ...
>
> template.html  -- This will display the form with the proper
> information (from a different views.py version), but the form inputs
> and the desc/reqs are not related in any way. Closest I've come except
> it obviously doesn't work.
>
> ...
> <form action="" method="post">{% csrf_token %}
>
> <ul>
> {% for dreq in question %}
>   {% if dreq.headline %}
>     <li>{{ dreq.headline }}</li>
>   {% endif %}
>   <li>{{ dreq.req_num }}: {{ dreq.desc}}</li>
>   {% if dreq.needs_answer %}
>     <div class="field">{{ saq_form.answer }}
>                        {{ saq_form.note }}</div>
>   {% endif %}
> {% endfor %}
> </ul>
>
> <input type="submit" value="Submit">
> </form>
> ...
>
> models.py
> ...
> # This is where the desc text comes from
> class DReq(models.Model):
>     req_num = models.CharField(max_length=5, blank=False)
>     headline = models.CharField(max_length=200, blank=True)
>     description = models.CharField(max_length=400, blank=False)
>     needs_answer = models.BooleanField(blank=False)
>     s_types = models.ManyToManyField(SType)
>
> class MSaq(models.Model):
>     complete = models.BooleanField(blank=True)
>     d_req = models.ManyToManyField(DReq, through='Saq')
>
> # This is where the data needs to be stored and related to
> class Saq(models.Model):
>     d_req = models.ForeignKey(DReq)
>     m_saq = models.ForeignKey(MSaq)
>     answer = models.NullBooleanField(blank=False)
>     note = models.CharField(max_length=200, blank=True)
> ...
>
> I have redacted some of the names to protect the innocent, I hope it
> is still easy to follow. I feel like I am missing something very
> basic, but I just can't wrap my head around what.
>
> So, I just need to link the descriptions (which get iterated and
> displayed just fine) to the form fields that get displayed with them,
> so I can write the responses to the db. I hope this isn't info
> overkill.
>
> Thanks in advance.
>
> Erich

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