add management command

this command already deployed; minimal testing required

core/management/commands/claim_by_isbn.py

@@ -0,0 +1,37 @@
+"""
+print user emails
+"""
+
+from django.core.management.base import BaseCommand
+from django.contrib.auth.models import User
+
+from regluit.core import models
+
+class Command(BaseCommand):
+    help = "claim books for rights_holder based on a text file of ISBNs"
+    args = "<rights_holder_id> <filename>"
+
+    def handle(self, rights_holder_id, filename, **options):
+        try:
+            rh = models.RightsHolder.objects.get(id=int(rights_holder_id))
+        except models.Identifier.DoesNotExist:
+            print '{} not a rights_holder'.format(rights_holder_id)
+            return
+        with open(filename) as f:
+            for isbn in f:
+                isbn = isbn.strip()
+                try:
+                    work = models.Identifier.objects.get(type='isbn',value=isbn).work
+                    try: 
+                        c = models.Claim.objects.get(work=work)
+                        print '{} already claimed by {}'.format(work, c.rights_holder)
+                    except models.Claim.DoesNotExist:
+                        c = models.Claim.objects.create(
+                            work=work, 
+                            rights_holder=rh, 
+                            user=rh.owner, 
+                            status='active')
+                        print '{} claimed for {}'.format(work, rh)
+                except models.Identifier.DoesNotExist:
+                    print '{} not loaded'.format(isbn)
+                    continue