devices are invalid without a name

app/models/device.rb

@@ -27,7 +27,8 @@ class Device < ActiveRecord::Base
 
   accepts_nested_attributes_for :postprocessing, update_only: true
 
-  validates_presence_of :name, :owner, on: :create
+  validates_presence_of :name
+  validates_presence_of :owner, on: :create
   #validates_uniqueness_of :name, scope: :owner_id, on: :create
 
   validates_uniqueness_of :device_token, allow_nil: true

spec/requests/v0/devices_spec.rb

@@ -344,10 +344,15 @@
     end
 
     it "will update a device with empty parameters access_token" do
-      api_put "devices/#{device.id}", { name: nil, access_token: token.token }
+      api_put "devices/#{device.id}", { access_token: token.token }
       expect(response.status).to eq(200)
     end
 
+    it "does not allow an empty device name" do
+      api_put "devices/#{device.id}", { name: nil, access_token: token.token }
+      expect(response.status).to eq(422)
+    end
+
     it 'can read and update a jsonb' do
       expect(device.postprocessing).to be_nil
       j = api_put "devices/#{device.id}", { postprocessing_attributes: {"blueprint_url":"999"}, access_token: token.token, name: 'ABBA' }