Show federated servers and connectors in admin

bookwyrm/models/connector.py

@@ -10,25 +10,25 @@ class Connector(BookWyrmModel):
     ''' book data source connectors '''
     identifier = models.CharField(max_length=255, unique=True)
     priority = models.IntegerField(default=2)
-    name = models.CharField(max_length=255, null=True)
+    name = models.CharField(max_length=255, null=True, blank=True)
     local = models.BooleanField(default=False)
     connector_file = models.CharField(
         max_length=255,
         choices=ConnectorFiles.choices
     )
-    api_key = models.CharField(max_length=255, null=True)
+    api_key = models.CharField(max_length=255, null=True, blank=True)
 
     base_url = models.CharField(max_length=255)
     books_url = models.CharField(max_length=255)
     covers_url = models.CharField(max_length=255)
-    search_url = models.CharField(max_length=255, null=True)
+    search_url = models.CharField(max_length=255, null=True, blank=True)
 
-    politeness_delay = models.IntegerField(null=True) #seconds
-    max_query_count = models.IntegerField(null=True)
+    politeness_delay = models.IntegerField(null=True, blank=True) #seconds
+    max_query_count = models.IntegerField(null=True, blank=True)
     # how many queries executed in a unit of time, like a day
     query_count = models.IntegerField(default=0)
     # when to reset the query count back to 0 (ie, after 1 day)
-    query_count_expiry = models.DateTimeField(auto_now_add=True)
+    query_count_expiry = models.DateTimeField(auto_now_add=True, blank=True)
 
     class Meta:
         ''' check that there's code to actually use this connector '''
@@ -38,3 +38,9 @@ class Connector(BookWyrmModel):
                 name='connector_file_valid'
             )
         ]
+
+    def __str__(self):
+        return "{} ({})".format(
+            self.identifier,
+            self.id,
+        )