Fix for #71. Made validation messages more robust and synced them between the Spring Validator based validation and the JSR-303 validation annotations. The output differed before but is now consistent.

spring-data-rest-example/src/main/java/org/springframework/data/rest/example/RestExporterExampleRestConfig.java

@@ -1,10 +1,13 @@
 package org.springframework.data.rest.example;
 
+import org.springframework.context.MessageSource;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.ImportResource;
+import org.springframework.context.support.ReloadableResourceBundleMessageSource;
 import org.springframework.data.rest.config.RepositoryRestConfiguration;
 import org.springframework.data.rest.example.jpa.Person;
+import org.springframework.data.rest.example.jpa.PersonValidator;
 import org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration;
 import org.springframework.hateoas.Link;
 import org.springframework.hateoas.Resource;
@@ -17,6 +20,17 @@ import org.springframework.hateoas.ResourceProcessor;
 @ImportResource("classpath:META-INF/spring/security-config.xml")
 public class RestExporterExampleRestConfig extends RepositoryRestMvcConfiguration {
 
+	@Bean public MessageSource messageSource() {
+		ReloadableResourceBundleMessageSource msgsrc = new ReloadableResourceBundleMessageSource();
+		msgsrc.setBasename("/WEB-INF/classes/ValidationMessages");
+		msgsrc.setFallbackToSystemLocale(false);
+		return msgsrc;
+	}
+
+	@Bean public PersonValidator beforeCreatePersonValidator() {
+		return new PersonValidator();
+	}
+
 	@Override protected void configureRepositoryRestConfiguration(RepositoryRestConfiguration config) {
 		config.addResourceMappingForDomainType(Person.class)
 		      .addResourceMappingFor("lastName")

spring-data-rest-example/src/main/java/org/springframework/data/rest/example/jpa/PersonValidator.java

@@ -0,0 +1,21 @@
+package org.springframework.data.rest.example.jpa;
+
+import org.springframework.validation.Errors;
+import org.springframework.validation.ValidationUtils;
+import org.springframework.validation.Validator;
+
+/**
+ * @author Jon Brisbin
+ */
+public class PersonValidator implements Validator {
+
+	@Override public boolean supports(Class<?> clazz) {
+		return Person.class.isAssignableFrom(clazz);
+	}
+
+	@Override public void validate(Object target, Errors errors) {
+		ValidationUtils.rejectIfEmpty(errors, "firstName", "not.blank");
+		ValidationUtils.rejectIfEmpty(errors, "lastName", "not.blank");
+	}
+
+}

spring-data-rest-example/src/main/resources/ValidationMessages_en_US.properties

@@ -0,0 +1 @@
+not.blank = Field {1} cannot be blank