Django中的Python for循环在字典中返回随机值

Question

I have a Wagtail page displaying the routing link block inside it and I'm adding an icon to the routing link model to display with title in the block on main page. In the main page I'm getting the context for uploaded file field for icon as below:

def get_context(self, request):
   context = super().get_context(request)
   routing_links_queryset = self.routing_links
   for link in routing_links_queryset:            
      i_link = link.link_icon
      if i_link:
           try:
              with i_link.icon.open() as file_obj:
                  data = file_obj.read()
                  data = data.decode("utf-8")                          
                  context["iconlink_data"] = data
           except OSError:
                pass
   return context

link_icon is field in routing_links model and icon is Filefield in Icon model. Now this is returning the context on the main page but if there are 2 routing link blocks on the main page, it will render the same icon for both.

Do I have to append the context in each iteration? How exactly I could append in this case or any alternative way to do this?

Answer 1

Modify get_context to add all the icons to a context["links"] dict, then loop through it in the template:

def get_context(self, request):
    context = super().get_context(request)
    routing_links_queryset = self.routing_links
    context["links"] = []
    for link in routing_links_queryset: 
        link_dict = {"link_obj": link}
        i_link = link.link_icon
        if i_link:
            try:
                with i_link.icon.open() as file_obj:
                    data = file_obj.read()
                    data = data.decode("utf-8")                          
                    link_dict["iconlink_data"] = data
        context["links"].append(link_dict)
            except OSError:
                pass
    return context

in the Django Template it would look something like:

{% for link_dict in links %}
   {{ link_dict.link_obj }}
   {{ link_dict.link_obj.link_field }}
   <svg height="35" width="35" style="display: inline">{{ link_dict.iconlink_data|safe }}</svg>
{% endfor %}

(Added as an answer for formatting)