from django.shortcuts import render
from siteforms.composers.bootstrap4 import Bootstrap4
from siteforms.toolbox import ModelForm


class MyForm(ModelForm):
    """This form will show us how siteforms works."""

    disabled_fields = {'somefield'}  # Declarative way of disabling fields.
    hidden_fields = {'otherfield'}  # Declarative way of hiding fields.
    readonly_fields = {'anotherfield'}  # Declarative way of making fields readonly.

    class Composer(Bootstrap4):
        """This will instruct siteforms to compose this
        form using Bootstrap 4 styling.

        """
    class Meta:
        model = MyModel  # Suppose you have a model class already.
        fields = '__all__'

def my_view(request):
    # Initialize form using data from POST.
    my_form = MyForm(request=request, src='POST')
    is_valid = form.is_valid()
    return render(request, 'mytemplate.html', {'form': my_form})

from siteforms.composers.bootstrap4 import Bootstrap4, FORM, ALL_FIELDS

class Composer(Bootstrap4):

    opt_size='sm'  # Bootstrap 4 has sizes, so let's make our form small.

    # Element (fields, groups, form, etc.) attributes are ruled by `attrs`.
    # Let's add rows=2 to our `contents` model field.
    attrs={'contents': {'rows': 2}}

    # To group fields into named groups describe them in `groups`.
    groups={
        'basic': 'Basic attributes',
        'other': 'Other fields',
    }

    # We apply custom layout to our form.
    layout = {
        FORM: {
            'basic': [  # First we place `basic` group.
                # The following three fields are in the same row -
                # two fields in the right column are stacked.
                ['title', ['date_created',
                           'date_updated']],
                'contents',  # This one field goes into a separate row.
            ],
            # We place all the rest fields into `other` group.
            'other': ALL_FIELDS,
        }
    }