local variable 'Gallery' referenced before assignment

[Ross Symonds]

I am trying to show photos from my galleries at http://localhost:8000/photos/about/.  But I am getting the error message 

UnboundLocalError at /photos/about/

local variable 'Gallery' referenced before assignment

Does anyone know what the error message means?

urls.py

path('about/', views.about, name='gallery-about'),

views.py

def about(request):

Gallery = Gallery.objects.filter(photos__approved=True)

return render(request, 'blog/about3.html')

[Ross Symonds]

I changed it to 

gallery = Gallery.objects.filter(photos__approved=True)

And now I am getting a new error message

Related Field got invalid lookup: approved

[Ross Symonds]

I am now being shown my three galleries. Instead of the contents of the galleries. 

gallerytest.html

{% extends "blog/base.html" %}

{% block content %}

<h1>Gallery Test</h1>

{% for photo in gallery %}

<a href="{{ photo.get_absolute_url }}">

<img src="{{ photo.get_thumbnail_url }}" alt="{{ photo.title }}">

</a>

{% endfor %}

{% endblock content %}

views.py

def about(request):

gallery = Gallery.objects.all().is_public()

context = {'gallery': gallery}

return render(request, 'blog/gallerytest.html', context)

[Ross Symonds]

On Wednesday, 10 June 2020 02:34:48 UTC, Hernan wrote:

Looks like you are iterating galleries not a gallery.

galleries = Gallery.objects.all().is_public()

{% for gallery in galleries %}

{% for photo in gallery %}

views.py 

I ended up using this code to just show photos from gallery 1. I think the 1 represents the galleries primary key. 

class about(request, ListView):

#gallerychoose = Gallery.objects.all().filter(title='Ha Giang Day 3')

gallery = Photo.objects.all().filter(galleries='1')

context = {'gallery': gallery}

return render(request, 'blog/gallerytest.html', context) 

I think changed it to a class based view because I wanted pagination.

class about(ListView):

    model = Photo

    template_name = 'blog/gallerytest.html'  # <app>/<model>_<viewtype>.html

    context_object_name = 'gallery'

    paginate_by = 4

    def get_queryset(self):

      #user=get_object_or_404(User,username=self.kwargs.get('username'))

      return Photo.objects.filter(galleries='1')

galleytest.html

{% extends "blog/base.html" %}

{% block content %}

<h2>Gallery Testing</h2>

{% for photo in gallery %}

<a href="{{ photo.image.url }}">

    <img src="{{ photo.get_thumbnail_url }}" alt="{{ photo.title }}">

</a>

{% endfor %}

{% if is_paginated %}

 <nav aria-label="Page navigation conatiner">

    <ul class="pagination justify-content-center">

    {% if page_obj.has_previous %}

      <a class="btn btn-outline-info mb-4" href="?page=1">First</a>

    

    {% endif %}

    {% for num in page_obj.paginator.page_range %}

      {% if page_obj.number == num %}

      <a class="btn btn-info mb-4" href="?page={{ num }}">{{ num }}</a>

      {% elif num > page_obj.number|add:'-2' and num < page_obj.number|add:'2' %}

      <a class="btn btn-outline-info mb-4" href="?page={{ num }}">{{ num }}</a>

      {% endif %}

     

  {% endfor %}

   {% if page_obj.has_next %}

      

      <a class="btn btn-outline-info mb-4" href="?page={{ page_obj.paginator.num_pages }}">Last</a>

    {% endif %}

</ul>

  </nav>

{% endif %}

{% endblock content %}

On Jun 9, 2020, at 10:09 PM, Ross Symonds <ross.kie...@gmail.com> wrote:

I am now being shown my three galleries. Instead of the contents of the galleries. 

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[Richard Barran]

> #gallerychoose = Gallery.objects.all().filter(title='Ha Giang Day 3')
> gallery = Photo.objects.all().filter(galleries='1')
>

To get all the photos in a gallery try something like this:

photos = Photo.objects.filter(galleries__title='Ha Giang Day 3’)

Explanation: there’s a many-to-many relation between Gallery and Photo.
Photo.objects.filter(galleries_ etc… means you’re filtering against the attributes of any of the galleries linked to a photo.