django-crispy-dynamic-relationships 1.0.1

Django crispy forms with dynamic one to many relationships.

Add dynamic one-to-many relationships to your crispy forms with easy model declaration. It handles saving, updating and deleting automatically.

Installation

This app can be installed and used in your django project by:

$ pip install django-crispy-dynamic-relationships

Edit your settings.py file to include ‘django-crispy-dynamic-relationships’ in the INSTALLED_APPS listing.

INSTALLED_APPS = [
    ...
    'django-crispy-dynamic-relationships',
]

Subclass ModelFormCrispy to build forms similar to ModelForm. Add an extra field for the one-to-many relationship. Multiple fields supported.

from django-crispy-dynamic-relationships.factory import ModelFormCrispy

class Child1Form(ModelFormCrispy):
    class Meta:
        model = models.Child1
        fields ='__all__'

class ParentForm(ModelFormCrispy):
    class Meta:
        model = models.Parent
        fields ='__all__'

    children = [Child1Form]

Instantiate Forms with the parent class (ParentForm in this example) and a model instance if updating. Then pass the instance to the view context.

from django_crispy_forms_dynamic.factory import Forms

context['parent_instance'] = Forms(parent_class=ParentForm, parent_instance=parent_instance)

Load ‘dynamic_modelform_tags’ in your template and apply the filter to the parent_instance.

{% load dynamic_modelform_tags %}
<form method="post">
    {% csrf_token %}
    {{ forms_factory|form_dynamic }}
    <button type="submit" id="id_submit">Submit</button>
</form>

Finally, save your form by calling is_valid() and save() methods in your POST method of your view.

def post(self,request,pk=None):
    print(request.POST)
    try:
        parent_instance = Parent.objects.get(pk=pk)
    except Parent.DoesNotExist:
        parent_instance = None
    factory= Forms(parent_class=ParentForm, parent_instance=parent_instance, form_data=request.POST)
    if factory.is_valid():
        factory.save()
        return redirect('success')

Docs & Source

• Source: https://github.com/angelgm/django-crispy-dynamic-relationships

• PyPI: https://pypi.org/project/django-crispy-dynamic-relationships