Re: How to prevent save/delete in the Admin

On 30/03/2015 10:48 AM, Mike Dewhirst wrote:
> On 30/03/2015 3:11 AM, Melvyn Sopacua wrote:
>> On Sunday 29 March 2015 22:04:23 Mike Dewhirst wrote:

snip

>>
>> That said, maybe I'm not getting your workflow correctly, but to me it
>> seems that if request.user is not owner, some fields should be readonly.
>> And this is what ModelAdmin.get_readonly_fields() is for.
>
> Working on this as we speak!
>
>>
>> If this doesn't work for you, can you explain why?
>
> I think it will work!
>
> More later.


It works beautifully!

# in utils.py
def is_public_domain(self, request, obj=None):
"""Return readonly fields. That is the 'modified' fields or all
fields depending on whether the substance is (a) yours or (b) not
yours but the substance is in the public domain. self is the inline
model and obj is the "master" model.
"""
if obj is not None:
if obj.company == get_user_company(request.user):
return self.ro_fields
else:
return self.model._meta.get_all_field_names()

# in substance admin.py
from utils import is_public_domain

class SubstanceAdmin(admin.ModelAdmin):

def get_queryset(self, request):
""" Limit the substances visible to just those owned by the
company of which the user is a member or those in the public
domain.
"""
qs = super(SubstanceAdmin, self).get_queryset(request)
return qs.filter(
Q(access_status=PUBLIC_DOMAIN,)
| Q(company=get_user_company(request),)
)
...
ro_fields = ['modified', 'modified_by',]
get_readonly_fields = is_public_domain
...
class SynonymsInline(admin.StackedInline):
model = Synonym
fk_name = 'substance'
ro_fields = ['modified', 'modified_by',]
get_readonly_fields = is_public_domain
...


Thank you very much Melvyn.

Cheers

Mike

>
> Thank you Melvyn
>
> Mike
>
>>
>


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