Hi Django community,
how can I access model fields dynamically during run time? At the moment I
just know how to access model fields explicitly.
An example:
class Example(models.Model):
text = models.CharField(max_length=50)
comment = models.CharField(max_length=50)
def return_info(self):
return self.text, self.comment
But I would like to dynamically parse over the existing fields and create
the string automatically. Something like this:
class Example(models.Model):
text = models.CharField(max_length=50)
comment = models.CharField(max_length=50)
FIELDS_ORDERED = ['text', 'comment'] # maybe even not this explicit,
could also use _meta, but I do explicitly because I don't want id/pk inside
def return_info(self):
a = ''
for field in self.FIELDS_ORDERED:
a += self.field # I know this does not work, but I would like
I know about getattr(), but therefore I need an instance which I think I
cannot self reference inside the model.
Note: The reason I am approaching this is: I use django REST framework
(DRF) and want to add a read-only dynamic field to a model. Unfortunately,
DRF does not allow me to call a model manager class inside the serializer
(idk why), so I can only call a method directly from the model.
An example:
class ExampleSerializer(serializers.ModelSerializer):
info = serializer.CharField(source='return_info', read_only=True)
class Meta:
model = Example
Does anyone can help me here? Thanks for any reply!
BR enrico
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