How to pass multiple app's models in one views? [django] - django

Question

Hei there,
I'm having difficulties passing two app models in one views. I have 2 apps :
Post
Author
What I expect is, I want to display Author's avatar in the Post views, so I can include it in posts loop.
Author models.py :
class Author(models.Model):
avatar = models.ImageField(upload_to='images/%Y/%m/%d', verbose_name=u'Author Avatar', validators=[validate_image], blank=True, null=True)
user = models.OneToOneField(User, on_delete=models.CASCADE)
location = models.CharField(max_length=30, blank=True)
...
Post views.py :
from app_author.models import Author
class PostList(ListView):
model = Post
template_name = 'app_blog/blog_homepage.html'
context_object_name = 'post_list'
paginate_by = 9
def get_context_data(self, **kwargs):
context = super(PostList, self).get_context_data(**kwargs)
context['post_hot'] = Post.objects.filter(misc_hot_post = True).order_by('-misc_created')[:1]
context['post_list'] = Post.objects.filter(misc_published = True).order_by('-misc_created')
context['author'] = Author.objects.all() # No need this line
return context
When I called something like this in templates, it doesn't work. The {{ author.avatar }} not showing :
{% for post in post_list %}
<ul>
<li>{{ post.title }}</li> # This is works just fine
<li>{{ author.avatar }}</li> # This does not work at all
<ul>
{% endfor %}
My Posts app urls.py :
from . import views
from django.conf import settings
from app_blog.views import PostList, PostDetailView
from django.conf.urls import include, url
from django.conf.urls.static import static
urlpatterns = [
url(r'^$', views.PostList.as_view(), name='post-list'),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
Any help would be greatly appreciated!
Thank you in advance!
Regards
--- UPDATE ---
Here is my Post models.py
import datetime
from django import forms
from django.db import models
from django.conf import settings
from autoslug import AutoSlugField
from django.forms import ModelForm
from app_author.models import Author
from taggit.managers import TaggableManager
from django.contrib.auth.models import User
from django.core.exceptions import ValidationError
from django.template.defaultfilters import slugify
# CUSTOM FILE SIZE VALIDATOR
def validate_image(fieldfile_obj):
filesize = fieldfile_obj.file.size
megabyte_limit = 5
if filesize > megabyte_limit*1024*1024:
raise ValidationError("Max file size is %sMB" % str(megabyte_limit))
class Category(models.Model):
# PRIMARY DATA
id = models.AutoField(primary_key=True)
category_name = models.CharField(max_length=200, verbose_name=u'Category Name', blank=False, null=False)
def __str__(self):
return str(self.category_name)
class Post(models.Model):
# PRIMARY DATA
post_image = models.ImageField(upload_to='images/%Y/%m/%d', verbose_name=u'Post Featured Image', validators=[validate_image], blank=True, null=True)
post_author = models.ForeignKey(Author, related_name="user_posts", null=True, blank=True)
post_title = models.CharField(max_length=200, verbose_name=u'Post Title', blank=False, null=False)
post_sub_title = models.CharField(max_length=200, verbose_name=u'Post Sub-Title', blank=False, null=False)
post_category = models.ForeignKey('Category', verbose_name=u'Post Category', on_delete=models.CASCADE)
post_content = models.TextField()
post_tags = TaggableManager()
slug = AutoSlugField(populate_from='post_title')
# MISC
misc_created = models.DateTimeField(default=datetime.datetime.now, null=True, blank=True)
misc_modified = models.DateTimeField(default=datetime.datetime.now, null=True, blank=True)
misc_hot_post = models.BooleanField(default=False)
misc_published = models.BooleanField(default=False)
def __str__(self):
return str(self.post_title)
#models.permalink
def get_absolute_url(self):
return 'app_blog:post', (self.slug,)
Thank you
--- UPDATE 2 ---
SOLVED
#Gagik & #Daniel answer sloved my problem. I just have to use this tag instead :
{{ post.post_author.avatar }}
I did not change any code above. Except I dont need this line :
context['author'] = Author.objects.all()
Thank you

Answer 1

You need to related Author and Post models to each other by ForeignKey file, like:
class Post (models.Model):
author = models.ForeignKey(Author)
Then when you can access to your avatar through post.author.
Updated:
Updating answer after question updated.
I think you need to update your template as follows. use post.post_author.avatar to access the avatar you need:
{% for post in post_list %}
<ul>
<li>{{ post.title }}</li> # This is works just fine
<li>{{ post.post_author.avatar }}</li> # This does not work at all
<ul>
{% endfor %}
Considering this please note that you don't need to search Author's desperately in your view. So you don't need to have following line:
context['author'] = Author.objects.all() # This is where I expect the magic is
Because when you have ForeignKey then you already have access to Author through post object.

Answer 2

Gagik and JF's answers should have been enough for you to work out what to do. Your foreign key is called "post_author", so that's what you should use in the template:
{{ post.post_author.avatar }}
There's no need for you get all the authors and pass them to the template in your view as you are doing.