Add ManyToMany fields for sites and subspecialty in Resource model

atlas/models.py

@@ -59,6 +59,7 @@ from generic.models import (
     SeriesBase,
     SeriesImageBase,
     Modality,
+    Site,
     UserUserGroup,
 )
 
@@ -1875,6 +1876,20 @@ class Resource(models.Model, AuthorMixin):
         help_text="Author of the resource",
         related_name="resources",
     )
+    # Link resources to one or more Sites (from generic.Site)
+    sites = models.ManyToManyField(
+        'generic.Site',
+        blank=True,
+        help_text='The site(s) this resource is associated with (if any).',
+        related_name='resources',
+    )
+
+    # Categorise resources by subspecialty
+    subspecialty = models.ManyToManyField(
+        Subspecialty,
+        blank=True,
+        help_text='Subspecialty or subspecialties this resource relates to.',
+    )
 
     def __str__(self) -> str:
         return self.name
@@ -1902,7 +1917,18 @@ class Resource(models.Model, AuthorMixin):
         else:
             html =  self.name
 
-        return format_html("<details class='resource-block'><summary>{}</summary>{}</details>", self.name, mark_safe(html))
+        meta = ''
+        if self.sites.exists():
+            meta += ' Sites: ' + ', '.join([s.short_code or s.full_name for s in self.sites.all()])
+        if self.subspecialty.exists():
+            meta += ' Subspecialty: ' + ', '.join([str(s) for s in self.subspecialty.all()])
+
+        return format_html(
+            "<details class='resource-block'><summary>{}</summary><div>{}</div><div class='text-muted small'>{}</div></details>",
+            self.name,
+            mark_safe(html),
+            meta,
+        )