Correct regexes for pids

sru/onbsru.py

@@ -6,7 +6,8 @@ from catalogue.sru import almasru
 
 
 class OnbRecordRetriever(almasru.RecordRetriever):
-    pid_re = re.compile(r'\d{7}')
+    dtl_re = re.compile(r'dtl\/\d*')
+    pid_re = re.compile(r'\d+')
 
     def __init__(self,
                  subdomain: str = 'obv-at-oenb',
@@ -47,7 +48,9 @@ class OnbRecordRetriever(almasru.RecordRetriever):
                 marc_856_note = marc_856_x.text
 
                 if 'ONB-DTL' in marc_856_note:
-                    pids.append(self.pid_re.findall(marc_856_url)[0])
+                    dtl_suffix = self.dtl_re.findall(marc_856_url)[0]
+                    print(dtl_suffix)
+                    pids.append(self.pid_re.findall(dtl_suffix))
 
         return pids