extract a little more shared case /longs

generic/models.py

@@ -24,6 +24,7 @@ from django.contrib.auth.models import User
 
 from django.db.models.signals import post_save
 from django.dispatch import receiver
+from helpers.images import pretty_print_dicom
 from rad.settings import REMOTE_URL
 from django.utils.html import format_html
 
@@ -115,6 +116,24 @@ class QuestionBase(models.Model):
         """If this makes sense in the question/answer context override"""
         return None
 
+class SeriesImageBase(models.Model):
+    position = models.IntegerField(default=0)
+    upload_filename = models.CharField(max_length=255, blank=True)
+    series = models.ForeignKey(
+        "Series", related_name="images", on_delete=models.SET_NULL, null=True
+    )
+
+    class Meta:
+        ordering = ["position"]
+        abstract = True
+
+    def get_dicom_info(self):
+        try:
+            info = pretty_print_dicom(pydicom.read_file(self.image))
+        except pydicom.errors.InvalidDicomError:
+            info = "File is not a dicom."
+        return info
+
 
 class SeriesBase(models.Model):
     description = models.TextField(