I have a field in my module that is used to hold the status of the object. So far I have used:
ORDER_STATUS = ((0, 'Started'), (1, 'Done'), (2, 'Error'))
status = models.SmallIntegerField(choices=ORDER_STATUS)
Its easy to convert one way:
def status_str(self): return ORDER_STATUS[self.status][1]
The problem is when updating. I find myself having code like this:
order.status = 2 # Error Status
Which is quite awful and gets really hard to synchronize. I guess a solution would be something similar to C's enum{}. Or perhaps there is a whole different way to tackle this problem ?
Thanks
Maybe this question helps you: Set Django IntegerField by choices=… name.
I quote from the accepted answer (with adjustments ;)):
Put this into your class (STATUS_CHOICES will be the list that is handed to the choices option of the field):
PENDING = 0
DONE = 1
STATUS_CHOICES = (
(PENDING, 'Pending'),
(DONE, 'Done'),
)
Then you can do order.status = Order.DONE.
Note that you don't have to implement an own method to retrieve the (readable) value, Django provides the method get_status_display itself.
what I usually do for this situation is:
models.py
from static import ORDER_STATUS
status = models.PositiveSmallIntegerField(choices=ORDER_STATUS)
static.py
ORDER_STATUS = ((0, 'Started'), (1, 'Done'), (2, 'Error'))
ORDER_STATUS_DICT = dict((v, k) for k, v in ORDER_STATUS)
Now you can do:
from static import ORDER_STATUS_DICT
order.status = ORDER_STATUS_DICT['Error']