Provide a utility function admin_link() for use in admin list pages.

- Legacy-Id: 2795

ietf/utils/admin.py

@@ -0,0 +1,47 @@
+
+def name(obj):
+    if hasattr(obj, 'abbrev'):
+        return obj.abbrev()
+    elif hasattr(obj, 'name'):
+        if callable(obj.name):
+            name = obj.name()
+        else:
+            name = unicode(obj.name)
+        if name:
+            return name
+    return unicode(obj)
+    
+def admin_link(field, label=None, ordering="", display=name, suffix=""):
+    if not label:
+        label = field.capitalize().replace("_", " ").strip()
+    if ordering == "":
+        ordering = field
+    def _link(self):
+        obj = self
+        for attr in field.split("__"):
+            obj = getattr(obj, attr)
+            if callable(obj):
+                obj = obj()
+        if hasattr(obj, "all"):
+            objects = obj.all()
+        elif callable(obj):
+            objects = obj()
+            if not hasattr(objects, "__iter__"):
+                objects = [ objects ]
+        elif hasattr(obj, "__iter__"):
+            objects = obj
+        else:
+            objects = [ obj ]
+        chunks = []
+        for obj in objects:
+            app = obj._meta.app_label
+            model = obj.__class__.__name__.lower()
+            id = obj.pk
+            chunks += [ u'<a href="/admin/%(app)s/%(model)s/%(id)s/%(suffix)s">%(display)s</a>' %
+                {'app':app, "model": model, "id":id, "display": display(obj), "suffix":suffix, } ]
+        return u", ".join(chunks)
+    _link.allow_tags = True
+    _link.short_description = label
+    _link.admin_order_field = ordering
+    return _link
+