Run unpaged query using Pageable.unpaged() through QuerydslMongoPredicateExecutor.findAll(…).

We now correctly consider unpaged queries if the Pageable is unpaged.

Closes: spring-projects#3751
Original Pull Request: spring-projects#3754

Author: mp911de

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/repository/support/QuerydslMongoPredicateExecutor.java

@@ -212,6 +212,10 @@ private SpringDataMongodbQuery<T> createQuery() {
 	 */
 	private SpringDataMongodbQuery<T> applyPagination(SpringDataMongodbQuery<T> query, Pageable pageable) {
 
+		if (pageable.isUnpaged()) {
+			return query;
+		}
+
 		query = query.offset(pageable.getOffset()).limit(pageable.getPageSize());
 		return applySorting(query, pageable.getSort());
 	}

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/support/QuerydslMongoPredicateExecutorIntegrationTests.java

@@ -27,6 +27,8 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.dao.IncorrectResultSizeDataAccessException;
 import org.springframework.dao.PermissionDeniedDataAccessException;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.domain.Sort.Direction;
 import org.springframework.data.mongodb.MongoDatabaseFactory;
@@ -122,6 +124,20 @@ public void findUsingAndShouldWork() {
 						.containsExactly(dave);
 	}
 
+	@Test // GH-3751
+	public void findPage() {
+
+		assertThat(repository
+				.findAll(person.lastname.startsWith(oliver.getLastname()).and(person.firstname.startsWith(dave.getFirstname())),
+						PageRequest.of(0, 10))
+				.getContent()).containsExactly(dave);
+
+		assertThat(repository
+				.findAll(person.lastname.startsWith(oliver.getLastname()).and(person.firstname.startsWith(dave.getFirstname())),
+						Pageable.unpaged())
+				.getContent()).containsExactly(dave);
+	}
+
 	@Test // DATAMONGO-362, DATAMONGO-1848
 	public void springDataMongodbQueryShouldAllowJoinOnDBref() {