How to upload files based on primary key of foreignkey? - django

Question

Basically I am trying to create an app which can allow user to upload lessons material such as documents on their specific posts. However, I am unsure of how I should display the documents uploaded based on the primary key of the posts. As of now, my posts are displaying all the documents that are being uploaded by the particular user.
This is my 'Post' model
class Post(models.Model):
title = models.CharField(max_length=100)
image = models.ImageField(default = 'default0.jpg', upload_to='course_image/')
description = models.TextField()
price = models.DecimalField(decimal_places=2, max_digits=6)
date_posted = models.DateTimeField(default=timezone.now)
author = models.ForeignKey(User, on_delete=models.CASCADE)
rating = models.IntegerField(default = 0)
def __str__(self):
return self.title
This is my 'Lesson' model
class Lesson(models.Model):
title = models.CharField(max_length=100)
file = models.FileField(upload_to="lesson/pdf")
date_posted = models.DateTimeField(default=timezone.now)
post = models.ForeignKey(Post, on_delete=models.CASCADE)
def __str__(self):
return self.title
def get_absolute_url(self):
return reverse('lesson_upload', kwargs={'pk': self.pk})
This is my Class-based listview that is supposed to display the uploaded lessons based on the posts:
class LessonListView(ListView):
model = Lesson
template_name = 'store/uploaded_lesson.html'
context_object_name = 'lesson'
def get_queryset(self):
self.post = get_object_or_404(post, name=self.kwargs['post'])
return Lesson.objects.filter(post=self.post)
{% extends "store/base.html" %}
{% block content %}
<div id="main">
<table class="table mb-0">
<thead>
<tr>
<th>Title</th>
<th>Author</th>
<th>Download</th>
<th>Delete</th>
</tr>
</thead>
<tbody>
{% for lesson in lesson %}
<tr>
<td>
{% if lesson.file %}
<img src="{{ lesson.file.url }}" style="width:100px;">
{% else %}
{% endif %}
</td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
{% endblock %}

Answer 1

You will need another model for the material they are uploading. Something like:
class UploadedPostMaterial(models.Model):
content= models.TextField()
date_uploaded = models.DateTimeField(default=timezone.now)
post = models.ForeignKey(Post, on_delete=models.CASCADE)
user = models.ForeignKey(User, on_delete=models.CASCADE)
This model will contain the uploaded data and tie it to a post. Now when you display all or specific Posts in your app, you can select the related content for each post and display the uploaded content.