Django Typeerror: Model Instances Without Primary Key Value Are Unhashable
I Have My Models. Py as Follows: Class Article(Models. Model): Date = Models. Datetimefield(Null=True, Blank=True) Title = Models. Textfield(Default=None...
I have my models.py as follows:
class Article(models.Model):
date = models.DateTimeField(null=True, blank=True)
title = models.TextField(default=None, null=True, blank=True)
content = models.TextField(default=None, null=True, blank=True)
author = models.TextField(default=None, null=True, blank=True)
url = models.CharField(max_length=255, default=None, null=True, blank=True, unique=True)
class Keyword(models.Model):
word = models.CharField(max_length=80)
def __str__(self):
return self.word
article = models.ForeignKey(Article, related_name='keywords_found', null=True, blank=True)
I encounter an error when I try to save the data like this:
Article.objects.create(date=publish_date, title=article.title, content=article.text, author=article.authors, url=url, keywords_found=keywords_found)
Here, keywords_found is a list of Keyword objects.
The error is:
TypeError: Model instances without primary key value are unhashable
Where am I going wrong?
Django version : 1.10
2 Answers
Try saving it this way -
art = Article.objects.create(date=publish_date,
title=article.title,
content=article.text,
author=article.authors,
url=url)
Keyword.objects.create(word=keywords, article=art)
I'm currently facing a similar issue (still in the process of finding a solution), but I believe I can provide some insights that might be of help.
Within the Django framework, there exists a package named contenttypes under the django.contrib namespace, which could potentially be contributing to the problem you're encountering. You can find more information about this package here: Django ContentTypes. And it should be listed on settings.py INSTALLED_APPS
To delve into the issue, you could start by running the following SQL query on your database:
SELECT * FROM django_content_type WHERE id IS NULL;
Executing this query might reveal entries within the django_content_type table that lack an id value. Identifying these occurrences could potentially shed light on the underlying cause of the problem you're facing.
Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.
