Override Django Admin Save Model

Question

I want to override Django form save method to be able to create multiple objects at once.

I have an AvailableHours model :

class AvailableHours(models.Model):
    free_date = models.ForeignKey(AvailableDates,null=True, blank=True,on_delete=models.CASCADE,related_name='freedate')
    free_hours_from = models.IntegerField(null=True, blank=True)
    free_hours_to = models.IntegerField(null=True, blank=True,)
    status = models.BooleanField(null=True,default=True,)

and I have a ModelForm for this class :

class TimeGenerator(forms.ModelForm):
    class Meta:
        model = AvailableHours

        fields = ['free_date','free_hours_from','free_hours_to','status']  

    def save(self, commit=True):
        base_item = super().save(commit=False)
        frm = self.cleaned_data['free_hours_from']
        to = self.cleaned_data['free_hours_to']
        items = [
            AvailableHours(
                free_date=base_item.free_date,
                status=base_item.status,
                free_hours_from=hour,
                free_hours_to=hour + 1,
            )
            for hour in range(frm, to)
        ]
        if commit:
            AvailableHours.objects.bulk_create(items)
        return items

I want to create multiple AvailableHours object like this: if the form is set free_hours_from = 13 and free_hours_to=16 so the save method creates 13-14 , 14-15, 15-16 I achieved this by overriding my ModelForm but now I want to override Admin Save model to do this from Django Admin.

I tried by doing it like this in admin.py

class AvailableHoursAdmin(admin.ModelAdmin):
    def save_model(self, commit=True):
        base_item = super().save(commit=False)
        frm = self.cleaned_data['free_hours_from']
        to = self.cleaned_data['free_hours_to']
        items = [
            AvailableHours(
                free_date=base_item.free_date,
                status=base_item.status,
                free_hours_from=hour,
                free_hours_to=hour + 1,
            )
            for hour in range(frm, to)
        ]
        if commit:
            AvailableHours.objects.bulk_create(items)
        return items
admin.site.register(AvailableHours,AvailableHoursAdmin)

but no luck.

anyone has a solution for this ?

Answer 1

Thanks to all answers from contributors below,

I managed to fix the issues with @Mahammadhusain answer regarding making extra object.

@admin.register(AvailableHours)
class AvailableHoursAdmin(admin.ModelAdmin):
    #form = TimeGenerator
    
    def save_model(self, request, obj, form, change):
        super().save_model(request, obj, form, change)

        frm = obj.free_hours_from
        to = obj.free_hours_to
        date =obj.free_date
        # Ensure from-to range is valid and create objects within the range
        if frm is not None and to is not None:
            items = [
                AvailableHours(
                    free_date=obj.free_date,
                    status=obj.status,
                    free_hours_from=hour,
                    free_hours_to=hour + 1,
                )
                for hour in range(frm, to)
            ]
            AvailableHours.objects.bulk_create(items)
            
            extra = AvailableHours.objects.get(
                free_hours_from = frm ,
                free_hours_to = to ,
                free_date=date ,
                )
            extra.delete()