Add support for GET /v1/nodes to return a list.

Adds the db/api and db/sqlalchemy/api methods,
and the 'get' method in the API service.

Partially implements bp:node-api-actions

Change-Id: I214687c19150e65183f663d99f165d7fdea9915f

ironic/api/controllers/v1.py

@@ -90,6 +90,11 @@ class Node(APIBase):
 class NodesController(rest.RestController):
     """REST controller for Nodes."""
 
+    @wsme_pecan.wsexpose([unicode])
+    def get(self):
+        """Retrieve a list of nodes."""
+        return pecan.request.dbapi.get_node_list()
+
     @wsme_pecan.wsexpose(Node, unicode)
     def get_one(self, uuid):
         """Retrieve information about the given node."""

ironic/db/api.py

@@ -47,6 +47,10 @@ class Connection(object):
         :param columns: List of columns to return.
         """
 
+    @abc.abstractmethod
+    def get_node_list(self):
+        """Return a list of node UUIDs."""
+
     @abc.abstractmethod
     def get_associated_nodes(self):
         """Return a list of ids of all associated nodes."""

ironic/db/sqlalchemy/api.py

@@ -89,6 +89,10 @@ class Connection(api.Connection):
     def get_nodes(self, columns):
         pass
 
+    def get_node_list(self):
+        query = model_query(models.Node.uuid)
+        return [i[0] for i in query.all()]
+
     @objects.objectify(objects.Node)
     def get_associated_nodes(self):
         pass

ironic/tests/db/test_nodes.py

@@ -67,6 +67,17 @@ class DbNodeTestCase(base.DbTestCase):
         self.assertRaises(exception.InvalidUUID,
                           self.dbapi.get_node, 'not-a-uuid')
 
+    def test_get_node_list(self):
+        uuids = []
+        for i in xrange(1, 6):
+            n = utils.get_test_node(id=i, uuid=uuidutils.generate_uuid())
+            self.dbapi.create_node(n)
+            uuids.append(unicode(n['uuid']))
+        res = self.dbapi.get_node_list()
+        uuids.sort()
+        res.sort()
+        self.assertEqual(uuids, res)
+
     def test_get_node_by_instance(self):
         n = self._create_test_node()