Skip to main content

Extra features for Django Forms

Project description

forms2: Django forms extra features

The forms2 package provides an enhanced version of django forms. In particular, the SQLAchemy integration and a per-field access control.

https://api.travis-ci.org/paylogic/forms2.png https://pypip.in/v/forms2/badge.png https://coveralls.io/repos/paylogic/forms2/badge.png?branch=master Documentation Status

Installation

pip install forms2

Usage

SQLAlchemy model form example:

class MyModelForm(SAModelForm):
    class Meta:
        model = MyModel
        mapping = {
            'field1': 'instance.child.attribute',
            'field2': 'attribute3',
        }
    field1 = forms.IntegerField()
    field2 = forms.CharField()

A simple example showing field access control:

class MyForm(FieldAccessMixin, Form):
    class Meta:
        access = {
            ('field1', 'field2'): access_admin,
            'field3': MyForm.access_admin1,
            None: lambda user, instance: FieldAccess.enabled,
        }
    field1 = forms.IntegerField()

    @classmethod
    def access_admin1(cls):
        return FieldAccess.readonly

A more realistic example for field access control:

def access_bank_details(user, instance):
    if not has_perm(user, instance, 'edit_bank_account'):
        if has_perm(user, instance, 'edit_contract_id'):
            return FieldAccess.readonly
        return FieldAccess.excluded
    return FieldAccess.enabled

def access_contract_id(user, instance):
    if not (has_perm(user, instance, 'edit_contract_id') and has_perm(user, instance, 'do_stuff')):
            return FieldAccess.readonly

class BankForm(FieldAccessMixin, Form):
    class Meta:
        access = {
            ('bank_account', 'bank_name', 'bank_balance'): access_bank_details,
            'contract_id': access_contract_id,
            None: BankForm.access_check,
        }

    bank_account = forms.CharField()
    bank_name = forms.CharField()
    bank_balance = forms.FloatField()

    contract_id = forms.IntegerField()

    some_other_field = forms.CharField()

    @classmethod
    def access_check(cls):
        return FieldAccess.readonly

Field access control using filter syntax:

@access_filter
def can_view_event(user, instance):
    if user.has_perm('event', 'view'):
        return FieldAccess.enabled

@access_filter
def can_view_merchant(user, instance):
    if user.has_perm('merchant', 'view'):
        return FieldAccess.enabled

@access_filter
def exclude_for_not_finance(user, instance):
    if not user.has_perm('merchant', 'some_financial_permission'):
        return FieldAccess.excluded

...

    access = {
        # Filters are applied left to right, the result is the first filter to return a FieldAccess value

        # This will be enabled if you can view the event, else readonly
        'field_a': can_view_event | default(FieldAccess.readonly),

        # This will be enabled if you can view the event OR the merchant, else excluded
        'field_b': can_view_event | can_view_merchant | default(FieldAccess.excluded),

        # This will be enabled if you can view the event AND the merchant, else excluded
        'field_b2': can_view_event & can_view_merchant | default(FieldAccess.excluded),

        # This will be excluded if you don't have some finance permission, else enabled (this is the default)
        'field_c': exclude_for_not_finance
    }

Contact

If you have questions, bug reports, suggestions, etc. please create an issue on the GitHub project page.

License

This software is licensed under the MIT license

See License

© 2013 Paylogic International.

Changelog

1.1.2

  • Allow to pass queryset as callable to make it lazy (bubenkoff)

1.0.1

  • No logging of exception getting the id from the value (bubenkoff)

0.1.9

  • Removed relative imports (wlansu)
  • Added a default instance=None to constructor method of BaseModelForm (wlansu)
  • Fixed a pep8 issue in tests.__init__() (wlansu)

0.1.8

  • Initial public release

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
forms2-1.1.2.tar.gz (6.3 kB) Copy SHA256 hash SHA256 Source None Apr 3, 2015

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page