Python: How to solve the issue : 'badly formed hexadecimal UUID string' in Django -

i have created 'post' model in included 'post_id' primary key field. when trying create post, raising error: 'badly formed hexadecimal uuid string'. appreciate helping me in solve this.

here's code.

models.py:

class post(models.model):      post_id = models.uuidfield(primary_key=true, default='uuid.uuid4', editable=false)     user = models.foreignkey(settings.auth_user_model, default=1)     from1 = models.charfield(max_length=20)     = models.charfield(max_length=20)     timestamp = models.datetimefield(auto_now=false, auto_now_add=true)      objects = postmanager()      def __unicode__(self):         return self.post_id      def __str__(self):         return self.post_id      def get_absolute_url(self):         return reverse("posts:detail", kwargs={"post_id": self.post_id})      class meta:         ordering = ["-timestamp", "-time"] 

views.py:

def post_create(request):      form = postform(request.post or none)     if form.is_valid():         instance = form.save(commit=false)         print(form.cleaned_data.get("post_id"))         instance.user = request.user         instance.save()         return httpresponseredirect(instance.get_absolute_url())     context = {         "form": form,     }     return render(request, "loggedin_load/post_load.html", context) 

you need import module , not use quotes around 'uuid.uuid4'.

it should like:

import uuid  # uuid module class post(models.model):      post_id = models.uuidfield(primary_key=true, default=uuid.uuid4, editable=false)  # using function uuid4 on module     user = models.foreignkey(settings.auth_user_model, default=1)     from1 = models.charfield(max_length=20)     = models.charfield(max_length=20)     timestamp = models.datetimefield(auto_now=false, auto_now_add=true)      objects = postmanager()      def __unicode__(self):         return self.post_id      def __str__(self):         return self.post_id      def get_absolute_url(self):         return reverse("posts:detail", kwargs={"post_id": self.post_id})      class meta:         ordering = ["-timestamp", "-time"] 

n.b i've not tested above code, , agree of comments shouldn't need uuid post_id. without knowing more couldn't further.