Display query set object in django template
Question
I have a model Post that I'm trying to display all the posts onto a template. I'm including the post.html onto the home.html.... I found a similar problem to my question but the objects still are not getting displayed link
I firt tried the to use python manage.py shell to create an object. So first I did this. Post.objects.all() <QuerySet [<Post: test>, <Post: admin>]>
then I tried to create a new posts. Post.objects.create(user="test", content="New comment") but got this error: ValueError: Cannot assign "'test'": "Post.user" must be a "User" instance.
Tried to troubleshoot and couldn't resolve it. So I just decided to write the code in the posts/views.py and it didn't work as well. I figure this is the root of my problem why the objects aren't showing up in the templates.
This is my posts/posts.views
def posts_list(request):
# if request.user.is_authenticated():
queryset = Post.objects.all()
context = {
"object_list": queryset,
"user": "username"
}
return render(request, "posts.html", context)
This is my templates/post.html
<!DOCTYPE html>
<html lang="en">
<body>
<h1>What's on your mind, {{ user }}</h1>
{ % for obj in object_list %}
{{obj.user}}<br/>
{{obj.content}}<br/>
{{obj.timestamp}}<br/>
{% endfor %}
</body>
</html>
3 answers
solution1
0 2019-02-17 17:50:13
Normally in request, django automatically add requested user. If that user has related permission to add new Post then following code should work
Post.objects.create(user=request.user, content="New comment")
solution2
0 ACCPTED 2019-02-17 17:57:08
You have asked two questions here. I'll answer both of them below:
Displaying your posts
First, you need to make sure that you are passing a user object to your template. Assuming that user info is stored in request.user, you can do so as follows:
views.py:
def posts_list(request):
if request.user.is_authenticated:
user = request.user
queryset = Post.objects.all()
context = {
"object_list": queryset,
"user": user
}
return render(request, "home.html", context)
home.html:
<html>
<h1>Homepage</h1>
{% if user.is_authenticated %}
<h1>What's on your mind, {{ user }}</h1>
{ % for obj in object_list %}
{{obj.user}}<br/>
{{obj.content}}<br/>
{{obj.timestamp}}<br/>
{% endfor %}
<a href="{% url 'logout' %}">Logout</a>
{% endif %}
</html>
Adding a post for a user
You need to get a user object to pass to your creation method, rather than using the string "test". The reason your attempt is failing is because you are passing the function a string ("test") where it is expecting a user object.
This line gets a user (arbitrarily grabs the first one in your list):
u = User.objects.all()[0]
This line imports the datetime module, which you'll need to generate date and datetime objects for your create method:
import datetime
And this line creates a post for that user:
Post.objects.create(user=u, content="New comment", publish=datetime.date.today(), updated=datetime.datetime.now(), timestamp=datetime.datetime.now())
solution3
0 2019-02-17 19:03:21
When you are creating a foreign key, you are referring a model. suppose there are two models A and B. B has following fields - x, y, z. Now, x field is a foreign key, which is referring model A.
Now whenever you want to create an object of B, then the value of x field should be an object of A. Little bit like this -
post1 = Post(user = an object of User Model, content = "your value")
so create an object of User first. Then write it there. otherwise it will give error.
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