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from django.core.management.base import LabelCommand, CommandError
from django.utils.encoding import force_unicode
class Command(LabelCommand):
help = "Outputs the specified model as a form definition to the shell."
args = "[app.model]"
label = 'application name and model name'
requires_model_validation = True
can_import_settings = True
def handle_label(self, label, **options):
return describe_form(label)
def describe_form(label, fields=None):
"""
Returns a string describing a form based on the model
"""
from django.db.models.loading import get_model
try:
app_name, model_name = label.split('.')[-2:]
except (IndexError, ValueError):
raise CommandError("Need application and model name in the form: appname.model")
model = get_model(app_name, model_name)
opts = model._meta
field_list = []
for f in opts.fields + opts.many_to_many:
if not f.editable:
continue
if fields and not f.name in fields:
continue
formfield = f.formfield()
if not '__dict__' in dir(formfield):
continue
attrs = {}
valid_fields = ['required', 'initial', 'max_length', 'min_length', 'max_value', 'min_value', 'max_digits', 'decimal_places', 'choices', 'help_text', 'label']
for k,v in formfield.__dict__.items():
if k in valid_fields and v != None:
# ignore defaults, to minimize verbosity
if k == 'required' and v:
continue
if k == 'help_text' and not v:
continue
if k == 'widget':
attrs[k] = v.__class__
elif k in ['help_text', 'label']:
attrs[k] = force_unicode(v).strip()
else:
attrs[k] = v
params = ', '.join(['%s=%r' % (k, v) for k, v in attrs.items()])
field_list.append(' %(field_name)s = forms.%(field_type)s(%(params)s)' % { 'field_name': f.name,
'field_type': formfield.__class__.__name__,
'params': params })
return '''
from django import forms
from %(app_name)s.models import %(object_name)s
class %(object_name)sForm(forms.Form):
%(field_list)s
''' % { 'app_name': app_name, 'object_name': opts.object_name, 'field_list': '\n'.join(field_list) }
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