fix for GRAILS-9004 "where/findall closures can fail on entities with relationships"

Author: graemerocher

grails-core/src/main/groovy/org/codehaus/groovy/grails/commons/GrailsClassUtils.java

@@ -919,7 +919,10 @@ public static String getPropertyForGetter(String getterName) {
     }
 
     private static String convertPropertyName(String prop) {
-        if (Character.isUpperCase(prop.charAt(0)) && Character.isUpperCase(prop.charAt(1))) {
+        if(prop.length() == 1) {
+            return prop.toLowerCase();
+        }
+        else if (Character.isUpperCase(prop.charAt(0)) && Character.isUpperCase(prop.charAt(1))) {
             return prop;
         }
         if (Character.isDigit(prop.charAt(0))) {

grails-test-suite-uber/src/test/groovy/org/codehaus/groovy/grails/commons/GrailsClassUtilsTests.java

@@ -128,6 +128,7 @@ public void testIsGetterOrSetter() {
     public void testGetPropertyForGetter() {
         assertEquals("something", GrailsClassUtils.getPropertyForGetter("getSomething"));
         assertEquals("URL", GrailsClassUtils.getPropertyForGetter("getURL"));
+        assertEquals("p", GrailsClassUtils.getPropertyForGetter("getP"));
     }
 
     public void testGetStaticField() {