Fixed error if no geo location backend is selected.

app/models/user_device.rb

@@ -23,7 +23,10 @@ store device for user
 
     # get location info
     location_details = Service::GeoIp.location(ip)
-    location = location_details['country_name']
+    location = 'unknown'
+    if location_details
+      location = location_details['country_name']
+    end
 
     # find device by fingerprint
     if fingerprint

lib/application_lib.rb

@@ -20,6 +20,7 @@ returns
     def load_adapter_by_setting(setting)
       adapter = Setting.get(setting)
       return if !adapter
+      return if adapter.empty?
 
       # load backend
       load_adapter(adapter)

lib/service/geo_calendar.rb

@@ -57,7 +57,7 @@ returns
     def self.location(address = nil)
 
       # load backend
-      backend = load_adapter_by_setting( 'geo_calendar_backend' )
+      backend = load_adapter_by_setting('geo_calendar_backend')
       return if !backend
 
       # db lookup

lib/service/geo_ip.rb

@@ -8,7 +8,7 @@ module Service
 
 lookup location based on ip or hostname
 
-  result = Service::GeoIp.location( '172.0.0.1' )
+  result = Service::GeoIp.location('172.0.0.1')
 
 returns
 
@@ -31,7 +31,7 @@ returns
     def self.location(address)
 
       # load backend
-      backend = load_adapter_by_setting( 'geo_ip_backend' )
+      backend = load_adapter_by_setting('geo_ip_backend')
       return if !backend
 
       # db lookup

lib/service/geo_location.rb

@@ -19,7 +19,7 @@ returns
     def self.geocode(address)
 
       # load backend
-      backend = load_adapter_by_setting( 'geo_location_backend' )
+      backend = load_adapter_by_setting('geo_location_backend')
       return if !backend
 
       # db lookup
@@ -41,7 +41,7 @@ returns
     def self.reverse_geocode(lat, lng)
 
       # load backend
-      backend = load_adapter_by_setting( 'geo_location_backend' )
+      backend = load_adapter_by_setting('geo_location_backend')
       return if !backend
 
       # db lookup

lib/service/image.rb

@@ -8,7 +8,7 @@ module Service
 
 lookup user image based on email address
 
-  file = Service::Image.user( 'skywalker@zammad.org' )
+  file = Service::Image.user('skywalker@zammad.org')
 
 returns
 
@@ -22,7 +22,7 @@ returns
     def self.user(address)
 
       # load backend
-      backend = load_adapter_by_setting( 'image_backend' )
+      backend = load_adapter_by_setting('image_backend')
       return if !backend
 
       backend.user(address)
@@ -48,7 +48,7 @@ returns
     def self.organization(domain)
 
       # load backend
-      backend = load_adapter_by_setting( 'image_backend' )
+      backend = load_adapter_by_setting('image_backend')
       return if !backend
 
       backend.organization(domain)
@@ -69,7 +69,7 @@ returns
     def self.organization_suggest(domain)
 
       # load backend
-      backend = load_adapter_by_setting( 'image_backend' )
+      backend = load_adapter_by_setting('image_backend')
       return if !backend
 
       result = backend.organization_suggest(domain)