BAEL 575: Pull request for Projections and Aggregation in Spring Data MongoDB (#1047)

* BAEL-575 - update spring data mongodb version to 1.9.6, update query dsl version to
4.1.4, Add constuctor to user class, add projection tests

* BAEL-575 - Add aggregation test files and zips.json resource

spring-data-mongodb/src/main/java/org/baeldung/model/User.java

@@ -13,7 +13,7 @@ import org.springframework.data.mongodb.core.mapping.DBRef;
 import org.springframework.data.mongodb.core.mapping.Document;
 import org.springframework.data.mongodb.core.mapping.Field;
 
-import com.mysema.query.annotations.QueryEntity;
+import com.querydsl.core.annotations.QueryEntity;
 
 @QueryEntity
 @Document
@@ -37,6 +37,11 @@ public class User {
 
     public User() {
     }
+    
+    public User(String name, Integer age) {
+        this.name = name;
+        this.age = age;
+    }
 
     @PersistenceConstructor
     public User(final String name, @Value("#root.age ?: 0") final Integer age, final EmailAddress emailAddress) {

spring-data-mongodb/src/main/java/org/baeldung/repository/UserRepository.java

@@ -26,4 +26,10 @@ public interface UserRepository extends MongoRepository<User, String>, QueryDslP
     List<User> findByNameStartingWith(String regexp);
 
     List<User> findByNameEndingWith(String regexp);
+    
+    @Query(value="{}", fields="{name : 1}")
+    List<User> findNameAndId();
+    
+    @Query(value="{}", fields="{_id : 0}")
+    List<User> findNameAndAgeExcludeId();
 }