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.
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(Form, FieldAccessMixin):
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(Form, FieldAccessMixin):
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
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
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