Re: Django multiple Model Forms in template

[martin . ma012500]

Hi. I have changed views.py last line to this:

return render(request, 'assumptions.html', {'formset': 
formset,'model_names': model_names,'name': name})

As a result, it outputted more forms, however they do not save to model 
forms to database and raise
Validation Error ['ManagementForm data is missing or has been tampered 
with']

Any advise how to successfully save the model forms into database is highly 
appreciated.

Thank you.

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Re: Django multiple Model Forms in template

[alex eckert]

This is likely not the answer you're looking for, but my two cents...

I've never been successful in writing the templates for formsets on my own, 
as they tend to end up looking rather clunky. I've been using this 
js
 
library to help me out as it lets you set up some basic variables and 
modify the appearance of the form rather easily. From my understanding, the 
delete and add buttons don't work very well if you simply render them in 
the template, but this library makes them work a little better. 

I've found formsets to be very frustrating so I hope you manage to do 
better than me!



On Friday, June 22, 2018 at 7:19:28 PM UTC-5, martin@gmail.com wrote:
>
> It would be highly appreciated if you could advise how the template should 
> be modified to scale model forms as per the code below. There are around 30 
> item models which are the same as parent model. Also, those model forms 
> have to be saved to database separately so I assume there should be the 
> same amount of model forms as there are models. Thank you very much in 
> advance and looking forward to your insights.
>
>
> *forms.py*
>
>
> from django import forms
>
> from django.forms import modelformset_factory, ModelForm
>
> from .models import Assumptions
>
>  
>
> class AssumptionsForm(ModelForm):
>
>  
>
> class Meta:
>
> model = Assumptions
>
> fields = ['Bad', 'Likely', 'Best']
>
> exclude = ()
>
>
> *models.py*
>
>
> from django.db import models
>
> from django.forms import ModelForm
>
>  
>
> class Assumptions(models.Model):
>
>  
>
> Bad = models.FloatField(null=True, blank=True, default=None)
>
> Likely = models.FloatField(null=True, blank=True, default=None)
>
> Best = models.FloatField(null=True, blank=True, default=None)
>
>  
>
> class Meta:
>
> abstract = True
>
>  
>
> class Item1(Assumptions):
>
>  pass
>
>  
>
> class Item2(Assumptions):
>
>  pass 
>
>  
>
> class ItemN(Assumptions):
>
>  pass 
>
>
> *views.py*
>
>
> from django.shortcuts import render
>
> from .forms import  modelformset_factory, AssumptionsForm
>
> from .models import Item1, Item2, Assumptions
>
>  
>
> model_names = [item1, item2 ... itemN]
>
>  
>
> def get_assumptions(request):
>
>  
>
>for name in model_names:
>
>  
>
> AssumptionsFormSet = modelformset_factory(name, form = AssumptionsForm, 
>
>
> extra = 5)
>
>  
>
> if request.method == 'POST':   
>
>  
>
> formset = AssumptionsFormSet(request.POST, prefix = str(name))
>
>  
>
> if formset.is_valid():
>
>  
>
> print('valid form')
>
>  
>
> for form in formset:
>
>  
>
> print('in for loop after valid form1')
>
>  
>
> name =  form.save()
>
>  
>
>  
>
>   else:
>
>  
>
> formset = AssumptionsFormSet
>
>  
>
> print('reached else')
>
>  
>
>   return render(request, 'assumptions.html', {'formset': formset})
>
>
> *assumptions.html*
>
>
> 
>
> {%for name in model_names%}
>
> 
>
> {{name}}
>
> {% csrf_token %}
>
>  
>
> {{ name }}
>
> {{ formset.management_form }}
>
> {{ formset.non_form_errors.as_ul }}
>
> 
>
> {% for form in formset.forms %}
>
>  {% if forloop.first %}
>
>  
>
>  {% for field in form.visible_fields %}
>
>  {{ field.label|capfirst }}
>
>  {% endfor %}
>
>   
>
>   {% endif %}
>
>   
>
>   {% for field in form.visible_fields %}
>
> 
>
>{# Include the hidden fields in the form #}
>
>{% if forloop.first %}
>
>   {% for hidden in form.hidden_fields %}
>
>   {{ hidden }}
>
>   {% endfor %}
>
>   {% endif %}
>
>   {{ field.errors.as_ul }}
>
>   {{ field }}
>
>  
>
>  {% endfor %}
>
>  
>
> {% endfor %}
>
>  
>
>  
>
>  
>
>  
>
> 
>
> 
>
> {% endfor%}
>
> 
>
>  
>

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