“Forms are static” – “No, they aren't”

My talk from DjangoCon Europe 2015 in Cardiff, Wales

Transcript

1. “Forms are static” – “No, they aren't”
2. Hi, I’m Markus Holtermann • Django Core Developer • CS MSc Student @m_holtermann • github.com/MarkusH • markusholtermann.eu
3. Forms are static
4. What does “static” even mean?
5. What about request dependent forms?
6. They are static too!
7. What are non-static forms then?
8. Why do you need them?
9. How does that work?
10. def modelform_factory(model, …): attrs = { ‘fields’: fields_for_model(model), ‘model’: model, } Meta = type(str('Meta'), (object,), attrs) class_attrs = {‘Meta’: Meta} class_name = model.__name__ + str('Form') return type( class_name, ModelForm, class_attrs )
11. Wait! Aren’t they still static?
12. type(name, bases, attrs) rocks!
13. django-dynamic-forms http://django-dynamic-forms.rtfd.org
14. Actions FormModel Name URLs Name FormFieldModel Options Label … … belongs to
15. @formmodel_action('Send to admins') def send_admins(form_model, form, request): # label → value mapped_data = form.get_mapped_data() # construct message message = render_to_string( 'dynamic_forms/email.txt', { 'form': form_model, 'data': mapped_data}) # send data via mail mail_admins( “New form submission”, message )
16. @dynamic_form_field class IntegerField(BaseDynamicFormField): cls = 'django.forms.EmailField' display_label = 'Email' class Meta: # attribute = [type, default, class] max_value = [int, None, forms.IntegerField] min_value = [int, None, forms.IntegerField]
20. django-dynamic-forms http://django-dynamic-forms.rtfd.org
21. Thank You! @m_holtermann • github.com/MarkusH • markusholtermann.eu