Refactor compute get methods

This should fix both fog#33 and fog#352 for compute

lib/fog/compute/google/models/addresses.rb

@@ -23,9 +23,15 @@ def all(region: nil, filter: nil, max_results: nil, order_by: nil, page_token: n
           load(data.map(&:to_h))
         end
 
-        def get(identity, region)
-          if address = service.get_address(identity, region).to_h
-            new(address)
+        def get(identity, region = nil)
+          if region
+            address = service.get_address(identity, region).to_h
+            return new(address)
+          elsif identity
+            response = all(:filter => "name eq #{identity}",
+                           :max_results => 1)
+            address = response.first unless response.empty?
+            return address
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/backend_services.rb

@@ -10,8 +10,9 @@ def all(_filters = {})
         end
 
         def get(identity)
-          if backend_service = service.get_backend_service(identity)
-            new(backend_service.to_h)
+          if identity
+            backend_service = service.get_backend_service(identity).to_h
+            return new(backend_service)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/disk_types.rb

@@ -24,15 +24,14 @@ def all(zone: nil, filter: nil, max_results: nil,
         end
 
         def get(identity, zone = nil)
-          response = nil
           if zone
-            response = service.get_disk_type(identity, zone).to_h
+            disk_type = service.get_disk_type(identity, zone).to_h
+            return new(disk_type)
           else
-            disk_types = all(:filter => "name eq .*#{identity}")
-            response = disk_types.first.attributes unless disk_types.empty?
+            response = all(:filter => "name eq .*#{identity}")
+            disk_type = response.first unless response.empty?
+            return disk_type
           end
-          return nil if response.nil?
-          new(response)
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404
           nil

lib/fog/compute/google/models/disks.rb

@@ -23,10 +23,16 @@ def all(zone: nil, filter: nil, max_results: nil, order_by: nil,
           load(data.map(&:to_h))
         end
 
-        def get(identity, zone)
-          response = service.get_disk(identity, zone)
-          return nil if response.nil?
-          new(response.to_h)
+        def get(identity, zone = nil)
+          if zone
+            disk = service.get_disk(identity, zone).to_h
+            return new(disk)
+          elsif identity
+            response = all(:filter => "name eq #{identity}",
+                           :max_results => 1)
+            disk = response.first unless response.empty?
+            return disk
+          end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404
           nil

lib/fog/compute/google/models/firewalls.rb

@@ -10,8 +10,9 @@ def all(opts = {})
         end
 
         def get(identity)
-          if firewall = service.get_firewall(identity)
-            new(firewall.to_h)
+          if identity
+            firewall = service.get_firewall(identity).to_h
+            return new(firewall)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/forwarding_rules.rb

@@ -29,18 +29,16 @@ def all(region: nil, filter: nil, max_results: nil,
         end
 
         def get(identity, region = nil)
-          response = nil
           if region
-            response = service.get_forwarding_rule(identity, region).to_h
+            forwarding_rule = service.get_forwarding_rule(identity, region).to_h
+            return new(forwarding_rule)
           elsif identity
             response = all(
               :filter => "name eq #{identity}", :max_results => 1
             ).first
-            response = response.attributes unless response.nil?
+            forwarding_rule = response.first unless response.empty?
+            return forwarding_rule
           end
-
-          return nil if response.nil?
-          new(response)
         end
       end
     end

lib/fog/compute/google/models/global_addresses.rb

@@ -10,8 +10,9 @@ def all(options = {})
         end
 
         def get(identity)
-          if address = service.get_global_address(identity).to_h
-            new(address)
+          if identity
+            address = service.get_global_address(identity).to_h
+            return new(address)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/global_forwarding_rules.rb

@@ -10,8 +10,9 @@ def all(opts = {})
         end
 
         def get(identity)
-          if rule = service.get_global_forwarding_rule(identity).to_h
-            new(rule)
+          if identity
+            rule = service.get_global_forwarding_rule(identity).to_h
+            return new(rule)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/http_health_checks.rb

@@ -10,9 +10,10 @@ def all(_filters = {})
         end
 
         def get(identity)
-          response = service.get_http_health_check(identity)
-          return nil if response.nil?
-          new(response.to_h)
+          if identity
+            http_health_check = service.get_http_health_check(identity).to_h
+            return new(http_health_check)
+          end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404
           nil

lib/fog/compute/google/models/images.rb

@@ -47,21 +47,22 @@ def current
 
         def get(identity, project = nil)
           project.nil? ? projects = all_projects : projects = [project]
-          data = nil
-          projects.each do |proj|
-            begin
-              data = service.get_image(identity, proj).to_h
-              data[:project] = proj
-            rescue ::Google::Apis::ClientError => e
-              next if e.status_code == 404
-              break
-            else
-              break
+          if identity
+            projects.each do |proj|
+              begin
+                response = service.get_image(identity, proj).to_h
+                # TODO: Remove this - see #405
+                response[:project] = proj
+                image = response
+                return new(image)
+              rescue ::Google::Apis::ClientError => e
+                next if e.status_code == 404
+                break
+              else
+                break
+              end
             end
           end
-
-          return nil if data.nil?
-          new(data)
         end
 
         def get_from_family(family, project = nil)

lib/fog/compute/google/models/instance_group_managers.rb

@@ -26,11 +26,13 @@ def all(zone: nil, filter: nil, max_results: nil,
 
         def get(identity, zone = nil)
           if zone
-            if instance_group_manager = service.get_instance_group_manager(identity, zone)
-              new(instance_group_manager.to_h)
-            end
-          else
-            all(:filter => "name eq .*#{identity}").first
+            instance_group_manager = service.get_instance_group_manager(identity, zone).to_h
+            return new(instance_group_manager)
+          elsif identity
+            response = all(:filter => "name eq .*#{identity}",
+                           :max_results => 1)
+            instance_group_manager = response.first unless response.empty?
+            return instance_group_manager
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/instance_groups.rb

@@ -18,16 +18,14 @@ def all(filters = {})
         end
 
         def get(identity, zone = nil)
-          if zone.nil?
-            zones = service.list_aggregated_instance_groups(:filter => "name eq .*#{identity}").items
-            instance_groups = zones.each_value.map(&:instance_groups).compact.first
-            if instance_groups
-              zone = instance_groups.first.zone.split("/")[-1]
-            end
-          end
-
-          if instance_group = service.get_instance_group(identity, zone)
-            new(instance_group.to_h)
+          if zone
+            instance_group = service.get_instance_group(identity, zone).to_h
+            new(instance_group)
+          elsif identity
+            response = all(:filter => "name eq #{identity}",
+                           :max_results => 1)
+            instance_group = response.first unless response.empty?
+            return instance_group
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/instance_templates.rb

@@ -10,8 +10,9 @@ def all
         end
 
         def get(identity)
-          if instance_template = service.get_instance_template(identity)
-            new(instance_template.to_h)
+          if identity
+            instance_template = service.get_instance_template(identity).to_h
+            return new(instance_template)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/machine_types.rb

@@ -23,10 +23,19 @@ def all(zone: nil, filter: nil, max_results: nil, order_by: nil, page_token: nil
           load(data.map(&:to_h) || [])
         end
 
-        def get(identity, zone)
-          machine_type = service.get_machine_type(identity, zone).to_h
-          return nil if machine_type.nil?
-          new(machine_type)
+        def get(identity, zone = nil)
+          if zone
+            machine_type = service.get_machine_type(identity, zone).to_h
+            return new(machine_type)
+          elsif identity
+            # This isn't very functional since it just shows the first available
+            # machine type globally, but needed due to overall compatibility
+            # See: https://github.com/fog/fog-google/issues/352
+            response = all(:filter => "name eq #{identity}",
+                           :max_results => 1)
+            machine_type = response.first unless response.empty?
+            return machine_type
+          end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404
           nil

lib/fog/compute/google/models/networks.rb

@@ -10,8 +10,9 @@ def all
         end
 
         def get(identity)
-          if network = service.get_network(identity).to_h
-            new(network)
+          if identity
+            network = service.get_network(identity).to_h
+            return new(network)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/operations.rb

@@ -26,15 +26,15 @@ def all(zone: nil, region: nil, filter: nil, max_results: nil,
 
         def get(identity, zone = nil, region = nil)
           if !zone.nil?
-            response = service.get_zone_operation(zone, identity)
+            operation = service.get_zone_operation(zone, identity).to_h
+            return new(operation)
           elsif !region.nil?
-            response = service.get_region_operation(region, identity)
-          else
-            response = service.get_global_operation(identity)
+            operation = service.get_region_operation(region, identity).to_h
+            return new(operation)
+          elsif identity
+            operation = service.get_global_operation(identity).to_h
+            return new(operation)
           end
-
-          return nil if response.nil?
-          new(response.to_h)
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404
           nil

lib/fog/compute/google/models/projects.rb

@@ -5,8 +5,9 @@ class Projects < Fog::Collection
         model Fog::Compute::Google::Project
 
         def get(identity)
-          if project = service.get_project(identity).to_h
-            new(project)
+          if identity
+            project = service.get_project(identity).to_h
+            return new(project)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/regions.rb

@@ -10,8 +10,9 @@ def all
         end
 
         def get(identity)
-          if region = service.get_region(identity).to_h
-            new(region)
+          if identity
+            region = service.get_region(identity).to_h
+            return new(region)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/routes.rb

@@ -10,8 +10,9 @@ def all
         end
 
         def get(identity)
-          if route = service.get_route(identity).to_h
-            new(route)
+          if identity
+            route = service.get_route(identity).to_h
+            return new(route)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404

lib/fog/compute/google/models/servers.rb

@@ -28,15 +28,15 @@ def all(zone: nil, filter: nil, max_results: nil,
 
         # TODO: This method needs to take self_links as well as names
         def get(identity, zone = nil)
-          response = nil
           if zone
-            response = service.get_server(identity, zone).to_h
-          elseif identity
-            server = all(:filter => "name eq .*#{identity}").first
-            response = server.attributes if server
+            server = service.get_server(identity, zone).to_h
+            return new(server)
+          elsif identity
+            response = all(:filter => "name eq .*#{identity}",
+                           :max_results => 1)
+            server = response.first unless response.empty?
+            return server
           end
-          return nil if response.nil?
-          new(response)
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404
           nil

lib/fog/compute/google/models/snapshots.rb

@@ -17,10 +17,11 @@ def all
           load(items)
         end
 
-        def get(snap_id)
-          response = service.get_snapshot(snap_id)
-          return nil if response.nil?
-          new(response.to_h)
+        def get(identity)
+          if identity
+            snapshot = service.get_snapshot(identity).to_h
+            return new(snapshot)
+          end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404
           nil

lib/fog/compute/google/models/ssl_certificates.rb

@@ -4,9 +4,10 @@ class Google
       class SslCertificates < Fog::Collection
         model Fog::Compute::Google::SslCertificate
 
-        def get(certificate_name)
-          if certificate = service.get_ssl_certificate(certificate_name)
-            new(certificate.to_h)
+        def get(identity)
+          if identity
+            ssl_certificate = service.get_ssl_certificate(certificate_name).to_h
+            return new(ssl_certificate)
           end
         rescue ::Google::Apis::ClientError => e
           raise e unless e.status_code == 404