Previous title: Unable to import ‘misaka’ – Django
I am following a tutorial about how to build a social network.
I run into this error:
IntegrityError at /posts/new/ NOT NULL constraint failed: posts_post.user_id
Complete traceback (please note the lines in bold):
The above exception (NOT NULL constraint failed: posts_post.user_id) was the direct cause of the following exception:
C:Applicazioni_TommasoPhytonlibsite-packagesdjangocorehandlersexception.py in inner
response = get_response(request) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangocorehandlersbase.py in _get_response
response = self.process_exception_by_middleware(e, request) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangocorehandlersbase.py in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangoviewsgenericbase.py in view
return self.dispatch(request, *args, **kwargs) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangocontribauthmixins.py in dispatch
return super().dispatch(request, *args, **kwargs) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangoviewsgenericbase.py in dispatch
return handler(request, *args, **kwargs) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangoviewsgenericedit.py in post
return super().post(request, *args, **kwargs) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangoviewsgenericedit.py in post
return self.form_valid(form) …
▶ Local vars
C:UsersTommasoDjango rest frameworkUdemy Djangosimplesocialpostsviews.py in form_valid
**return super().form_valid(form)** …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangoviewsgenericedit.py in form_valid
self.object = form.save() …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangoformsmodels.py in save
self.instance.save() …
▶ Local vars
C:UsersTommasoDjango rest frameworkUdemy Djangosimplesocialpostsmodels.py in save
**super().save(*args, **kwargs)** …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbmodelsbase.py in save
force_update=force_update, update_fields=update_fields) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbmodelsbase.py in save_base
force_update, using, update_fields, …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbmodelsbase.py in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbmodelsbase.py in _do_insert
using=using, raw=raw) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbmodelsmanager.py in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbmodelsquery.py in _insert
return query.get_compiler(using=using).execute_sql(return_id) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbmodelssqlcompiler.py in execute_sql
cursor.execute(sql, params) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbbackendsutils.py in execute
return super().execute(sql, params) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbbackendsutils.py in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbbackendsutils.py in _execute_with_wrappers
return executor(sql, params, many, context) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbbackendsutils.py in _execute
return self.cursor.execute(sql, params) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbutils.py in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbbackendsutils.py in _execute
return self.cursor.execute(sql, params) …
▶ Local vars
C:Applicazioni_TommasoPhytonlibsite-packagesdjangodbbackendssqlite3base.py in execute
return Database.Cursor.execute(self, query, params) …
▶ Local vars
The lines in bold are pointing to these two pieces of code:
1: In my_projectpostsviews.py in form_valid:
def form_valid(self, form):
self.object = form.save(commit=False)
self.object = self.request.user
self.object.save()
return super().form_valid(form) #<--highligted line
2: In my_projectpostsmodels.py in save
def save(self, *args, **kwargs):
self.message_html = m.html(self.message)
super().save(*args, **kwargs) #<--highligted line
These functions are run when a user posts a new post inside a group of the social network.
I am using VScode, so I noticed that apparently, my code does not recognise misaka, installed via pip and imported as follows:
import misaka as m
Pylint import error: Unable to import ‘misaka’
I have read misaka documentation but I can’t understand what is wrong.
please note I am using Misaka v. 2.1.0, that apparently does not need to be installed in INSTALLED_APPS in settings.
Any thoughts?
Since it has been suggested that I am trying to create a Post model object into the database without setting the user foreign key, here you can see my my_project/posts/model.py:
from django.db import models
from django.urls import reverse #vho corretto io, ersione di django cambiata
from django.conf import settings
import misaka as m
from groups.models import Group
from django.contrib.auth import get_user_model
User = get_user_model()
class Post(models.Model):
user = models.ForeignKey(User, related_name="posts", on_delete=models.CASCADE)
created_at = models.DateTimeField(auto_now=True)
message = models.TextField()
message_html = models.TextField(editable=False)
group = models.ForeignKey(Group, related_name="posts", null=True, blank=True, on_delete=models.CASCADE)
def __str__(self):
return self.message
def save(self, *args, **kwargs):
self.message_html = m.html(self.message)
super().save(*args, **kwargs)
def get_absolute_url(self):
return reverse('posts:single', kwargs={'username':self.user.username, 'pk':self.pk})
class Meta:
ordering = ['-created_at']
unique_together = ['user', 'message']
Advertisement
Answer
You’re trying to insert a Post model object into the database without setting the User foreign key.
You should set it to the user object attached to the request first.
def form_valid(self, form):
form.instance.created_by = self.request.user
return super().form_valid(form)
Check Django Documentation