Add options

fabaff · fabaff · commit 722c4a6b146f · 2016-08-15T18:42:45.000+02:00
diff --git a/source/developers/development_validation.markdown b/source/developers/development_validation.markdown
@@ -33,6 +33,8 @@ This section contains a couple of snippets for the validation we use.
 
 ### {% linkable_title Default name %} 
 
+It's common to set a default for a sensor if the user is not providing a name to use.
+
 ```python
 DEFAULT_NAME = 'Sensor name'
 
@@ -41,6 +43,18 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
     vol.Optional(CONF_NAME, default=DEFAULT_NAME): cv.string,
 ```
 
+### {% linkable_title Limit the values %} 
+
+In certain cases you want to limit the user's input to a couple of options.
+
+```python
+DEFAULT_METHOD = 'GET'
+
+PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
+    ...
+    vol.Optional(CONF_METHOD, default=DEFAULT_METHOD): vol.In(['POST', 'GET']),
+```
+
 ### {% linkable_title Port %} 
 
 As all port numbers are coming out of the range 1 till 65535 a range check should be performed. 
