Re: How to retrieve data from different related model (This post was posted earlier on but was deleted due code not being clear)

What field of Category you want to get from post model ? name?

maybe k.category instead of k.name? ( template)

Or explain better :P

Missatge de Benedict Uwazie <nonwaz78@gmail.com> del dia dj., 24 d'oct. 2019 a les 21:19:

Thanks, but this did not help

On Thursday, 24 October 2019 19:43:51 UTC+1, Gil Obradors wrote:

Hi,

I don't know if I understand what you mean...

Is this good for you?

from first_app.models import Author, Category, Post

def post_from_cat(request, cat_id):

b = Category.objects.get(pk=cat_id)

return render(request, 'first_app/index.html', {'key': b})

Missatge de Benedict Uwazie <nonw...@gmail.com> del dia dj., 24 d'oct. 2019 a les 18:41:

Please I am new to using google groups. This post have been posted earlier but the

code was not clear enough

I have an issue that I have been battling for a long time I 

want to get data out from different related models. I have three

models. Category, Author, Post. The Category model categories my post 

that are on the Post model. The issue I am having is this, when I perform my loop

on my template (i.e html file) I can get data out from my Post model but I can not

get data out from my Category model. Please I need someone to help me out or tell me

what I am doing wrong.

below is my sample code for you to know what I am talking about.

class Category(models.Model):

    name = models.CharField(max_length=100)

    tagline = models.TextField()

    def __str__(self):

        return self.name

class Author(models.Model):

    name = models.CharField(max_length=200)

    email = models.EmailField()

    def __str__(self):

        return self.name

class Post(models.Model):

    category = models.ForeignKey(Category, on_delete=models.CASCADE, null=True, related_name='my_category')

    headline = models.CharField(max_length=255)

    body_text = models.TextField()

    authors = models.ManyToManyField(Author)

  

    def __str__(self):

        return self.headline

on views.py

from first_app.models import Author, Category, Post

def post_from_cat(request, cat_id):

b = Category.objects.get(pk=cat_id)

result = b.my_category.all()

return render(request, 'first_app/index.html', {'key':result})

on urls.py

from first_app import views

urlpatterns = [

path('', views.home_app, name='home_app'),

path('post-cat/<int:cat_id>/', views.post_from_cat, name='post_from_cat'),

]

on my template that (my html file)

{% if key %}

{% for k in key %}

<p><strong>Category: </strong> {{ k.name }}</p>

<p><strong>Title</strong><br>{{ k.headline }}</p>

<p><strong>Body</strong><br>{{ k.body_text }}</p>

<hr>

{% endfor %}

{% else %}

<p>No data</p>
{% endif %}

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