set str representation for MDDRCompoundImport model

Former-commit-id: c0e7a23d6eecbd553815db5d4d25a2ad4046aae4

ippisite/ippidb/models.py

@@ -288,6 +288,9 @@ class MDDRCompoundImport(models.Model):
         unique_together = (('mddr_name', 'dvpmt_phase', 'canonical_smile'),)
         verbose_name_plural = "MDDR compound imports"
 
+    def __str__(self):
+        return "{}, {}".format(self.mddr_name, self.dvpmt_phase)
+
 class MDDRSimilarity(models.Model):
     canonical_smile_ippidb = models.CharField('Canonical Smile for IPPIDB compound', max_length=500, unique=True, blank=True, null=True)
     canonical_smile_mddr = models.CharField('Canonical Smile for MDDR Compound', max_length=500, unique=True, blank=True, null=True)