12π
2 Options.
Option 1:
Create a new field
, copy forms.ModelChoiceField
and override label_from_instance
.
# From the source
class PageModelChoiceField(forms.ModelChoiceField():
def label_from_instance(self, obj):
"""
This method is used to convert objects into strings; it's used to
generate the labels for the choices presented by this object. Subclasses
can override this method to customize the display of the choices.
"""
# Then return what you'd like to display
return "Page{0} - Test{1}".format(obj.pk, obj.test.pk)
This will only change the text for that particular dropdown field. As you are accessing the Test
object for each item in the list, you may want to ensure the queryset
you pass to the PageModelChoiceField
has select_related('test')
, otherwise it will make a DB hit for each item on the list.
Iβve not tested this exact code but the logic is there. Will try it later when I can
class QuestionForm(forms.ModelForm):
page = PageModelChoiceField(
queryset=Page.objects.select_related('test').all()
)
class Meta:
model = Page
class QuestionAdmin(ModelAdmin):
class Meta:
model = Question
form = QuestionForm
Option B.
Change the unicode() representation of Page
.
class Page(models.Model):
test = models.ForeignKey(Test)
def __unicode__(self):
return "Page{0} - Test{1}".format(obj.pk, obj.test.pk)
This will change how Page
s are displayed everywhere you print a page object, print(page_object)
, {{ page_object }}
.
Personally I prefer Option 1
1π
For some reason Option B in the accepted answer didnβt work for me so I figured Iβd update this page with what worked well for me.
You can overload the __str__ function for the Page model to get what youβre wanting. So, something along the lines of this
class Page(models.Model):
test = models.ForeignKey(Test)
def __str__(self):
return f'Page{self.pk} - Test{self.test.pk}'