I can't get Django to INNER JOIN properly :( - django

Question

Despite having looked everywhere for similar issues I still cannot make the query working using INNER JOIN with the Django ORM... Sorry if this might sound stupid, but this is my first time with Django on a project and especially the ORM.
I have an Articles table with a Users table (named Fellows in my case), the Articles table has it's foreign key on author and references the user_id in Fellows table.
class Fellow(models.Model):
id = models.AutoField(db_column='ID', primary_key=True) # ID
user_id = models.PositiveBigIntegerField(db_column='User_ID', unique=True) # Global User ID.
nickname = models.CharField(db_column='Name', max_length=64, db_collation='utf8mb4_general_ci') # Display Name
user_password = models.CharField(db_column='User_Password', max_length=256, blank=True, null=True) # Passwd
gold = models.IntegerField(db_column='Gold') # Credits
faction = models.ForeignKey('Faction', models.RESTRICT, db_column='Faction', default=1) # ID Faction
class Meta:
managed = False
db_table = 'Fellows'
def __str__(self):
return self.nickname # Test.
class Article(models.Model):
id = models.AutoField(db_column='ID', primary_key=True) # ID
author = models.ForeignKey('Fellow', models.CASCADE, db_column='ID_User', default=1) # Global User ID
title = models.CharField(db_column='Title', max_length=32) # Title
content = models.TextField(db_column='Content') # Content
posted = models.DateTimeField(db_column='Posted') # Date Posted
source = models.CharField(db_column='Source', max_length=64, blank=True, null=True) # Source picture url of the article.
class Meta:
db_table = 'Articles'
I tried to get the display name of the related author that posted the article without success.
This is my views.py:
from .models import Article
def index(request):
"""
And then Vue.JS will take care of the rest.
"""
# articles = Article.objects.order_by('-posted')[:5] # Returns everything inside Articles table but nothing inside Fellows table.
# articles = Article.objects.select_related() # No Result.
# Still can't get display_name in index.html with this one.
articles = Article.objects.raw('SELECT Fellows.Name AS Display_Name, Articles.ID, Articles.Title, Articles.Content, Articles.Posted, Articles.Source FROM Articles INNER JOIN Fellows ON Fellows.User_ID = Articles.ID_User ORDER BY Articles.ID DESC LIMIT 5;')
data = {
'articles': articles,
}
return render(request, 'home/index.html', data)
The raw request returns everything fine only with sql interpreter, so there is two options:
Django won't perform the INNER JOIN.
I didn't figured out how to read the Display_Name in the template (index.html).
This is how I retrieve the data using VueJS (even with the raw query I can't get the display_name, it's empty).
<script>
const store = new Vuex.Store({
state: {
articles: [
{% for article in articles %}
{
title: '{{ article.title }}',
content: '{{ article.content | linebreaksbr }}',
source: "{% static 'home/img/' %}" + '{{article.source}}',
display_name: '{{article.display_name}}', // Maybe this is not how to retrieve the display_name?
},
{% endfor %}
],
},
});
// Components.
ArticleList = Vue.component('article-list', {
data: function () { return { articles: store.state.articles } },
template: '#article-list-template',
});
ArticleItem = Vue.component('article-item', {
delimiters: ['[[', ']]'],
props: ['id', 'title', 'content', 'source', 'display_name'],
template: '#article-item-template',
});
...
</script>
if someone could help me with this I would appreciate immensely! TT

Answer 1

Problem solved,
I had to change the foreign key constraint Articles.ID_User which now leads to Fellows.ID.
Previously the constraint led to Fellows.User_ID.
I can finally use:
articles = Article.objects.select_related('author').order_by('-posted')[:5]
And indeed finally accessing it in the front by article.author, simple as that.
Yet I still don't really understand why the raw sql query (using the mysql interpreter) with the INNER JOIN worked fine tho when referencing Fellows.User_ID, which was apparently not the case in the ORM.
Although it is working, my sql relational might be wrong or not ideal, therefore I am still open to suggestions!