job.cancel() should remove itself from queue.

rq/job.py

@@ -447,9 +447,14 @@ class Job(object):
         cancellation.  Technically, this call is (currently) the same as just
         deleting the job hash.
         """
+        from .queue import Queue
         pipeline = self.connection._pipeline()
         self.delete(pipeline=pipeline)
         pipeline.delete(self.dependents_key)
+
+        if self.origin:
+            queue = Queue(name=self.origin, connection=self.connection)
+            queue.remove(self, pipeline=pipeline)
         pipeline.execute()
 
     def delete(self, pipeline=None):

rq/queue.py

@@ -130,9 +130,13 @@ class Queue(object):
         """Returns a count of all messages in the queue."""
         return self.connection.llen(self.key)
 
-    def remove(self, job_or_id):
+    def remove(self, job_or_id, pipeline=None):
         """Removes Job from queue, accepts either a Job instance or ID."""
         job_id = job_or_id.id if isinstance(job_or_id, self.job_class) else job_or_id
+        
+        if pipeline is not None:
+            pipeline.lrem(self.key, 0, job_id)
+        
         return self.connection._lrem(self.key, 0, job_id)
 
     def compact(self):

tests/test_job.py

@@ -321,9 +321,12 @@ class TestJob(RQTestCase):
 
     def test_cancel(self):
         """job.cancel() deletes itself & dependents mapping from Redis."""
-        job = Job.create(func=say_hello)
+        queue = Queue(connection=self.testconn)
+        job = queue.enqueue(say_hello)
         job2 = Job.create(func=say_hello, depends_on=job)
         job2.register_dependency()
         job.cancel()
         self.assertFalse(self.testconn.exists(job.key))
         self.assertFalse(self.testconn.exists(job.dependents_key))
+
+        self.assertNotIn(job.id, queue.get_job_ids())

tests/test_queue.py

@@ -90,16 +90,12 @@ class TestQueue(RQTestCase):
         self.assertEqual(q.job_ids, [])
 
     def test_compact(self):
-        """Compacting queueus."""
+        """Queue.compact() removes non-existing jobs."""
         q = Queue()
 
         q.enqueue(say_hello, 'Alice')
-        bob = q.enqueue(say_hello, 'Bob')
         q.enqueue(say_hello, 'Charlie')
-        debrah = q.enqueue(say_hello, 'Debrah')
-
-        bob.cancel()
-        debrah.cancel()
+        self.testconn.lpush(q.key, '1', '2')
 
         self.assertEquals(q.count, 4)
 

tests/test_worker.py

@@ -155,9 +155,7 @@ class TestWorker(RQTestCase):
         job = q.enqueue(create_file, SENTINEL_FILE)
 
         # Here, we cancel the job, so the sentinel file may not be created
-        assert q.count == 1
-        job.cancel()
-        assert q.count == 1
+        self.testconn.delete(job.key)
 
         w = Worker([q])
         w.work(burst=True)