#69 - Allow object creation with a subset of columns.

We now allow object creation when not all columns are present by leveraging R2DBC RowMetadata. A column subset is necessary for projections.

src/test/java/org/springframework/data/r2dbc/convert/EntityRowMapperUnitTests.java

@@ -7,13 +7,15 @@ import io.r2dbc.spi.Row;
 import io.r2dbc.spi.RowMetadata;
 import lombok.RequiredArgsConstructor;
 
+import java.util.Collection;
 import java.util.List;
 import java.util.Set;
 
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.junit.MockitoJUnitRunner;
-import org.springframework.data.r2dbc.convert.EntityRowMapper;
+
 import org.springframework.data.r2dbc.core.DefaultReactiveDataAccessStrategy;
 import org.springframework.data.r2dbc.dialect.PostgresDialect;
 
@@ -30,6 +32,14 @@ public class EntityRowMapperUnitTests {
 
 	Row rowMock = mock(Row.class);
 	RowMetadata metadata = mock(RowMetadata.class);
+	Collection<String> columns = mock(Collection.class);
+
+	@Before
+	public void before() {
+
+		when(columns.contains(anyString())).thenReturn(true);
+		when(metadata.getColumnNames()).thenReturn(columns);
+	}
 
 	@Test // gh-22
 	public void shouldMapSimpleEntity() {

src/test/java/org/springframework/data/r2dbc/core/ReactiveDataAccessStrategyTestSupport.java

@@ -29,13 +29,13 @@ import java.time.LocalDateTime;
 import java.time.LocalTime;
 import java.time.OffsetDateTime;
 import java.time.ZonedDateTime;
+import java.util.Collection;
 import java.util.UUID;
 import java.util.function.BiConsumer;
 import java.util.function.Function;
 
 import org.junit.Test;
-import org.springframework.data.r2dbc.core.DefaultReactiveDataAccessStrategy;
-import org.springframework.data.r2dbc.core.ReactiveDataAccessStrategy;
+
 import org.springframework.data.r2dbc.dialect.Dialect;
 import org.springframework.data.r2dbc.mapping.SettableValue;
 
@@ -177,6 +177,9 @@ public abstract class ReactiveDataAccessStrategyTestSupport {
 		ReactiveDataAccessStrategy strategy = getStrategy();
 		Row rowMock = mock(Row.class);
 		RowMetadata metadataMock = mock(RowMetadata.class);
+		Collection<String> columnNames = mock(Collection.class);
+		when(metadataMock.getColumnNames()).thenReturn(columnNames);
+		when(columnNames.contains(fieldname)).thenReturn(true);
 
 		PrimitiveTypes toSave = new PrimitiveTypes();
 		setter.accept(toSave, testValue);

src/test/java/org/springframework/data/r2dbc/repository/H2R2dbcRepositoryIntegrationTests.java

@@ -81,7 +81,7 @@ public class H2R2dbcRepositoryIntegrationTests extends AbstractR2dbcRepositoryIn
 		Flux<LegoSet> findByNameContains(String name);
 
 		@Override
-		@Query("SELECT * FROM legoset")
+		@Query("SELECT name FROM legoset")
 		Flux<Named> findAsProjection();
 
 		@Override

src/test/java/org/springframework/data/r2dbc/repository/MySqlR2dbcRepositoryIntegrationTests.java

@@ -85,7 +85,7 @@ public class MySqlR2dbcRepositoryIntegrationTests extends AbstractR2dbcRepositor
 		Flux<LegoSet> findByNameContains(String name);
 
 		@Override
-		@Query("SELECT * FROM legoset")
+		@Query("SELECT name FROM legoset")
 		Flux<Named> findAsProjection();
 
 		@Override

src/test/java/org/springframework/data/r2dbc/repository/PostgresR2dbcRepositoryIntegrationTests.java

@@ -85,7 +85,7 @@ public class PostgresR2dbcRepositoryIntegrationTests extends AbstractR2dbcReposi
 		Flux<LegoSet> findByNameContains(String name);
 
 		@Override
-		@Query("SELECT * FROM legoset")
+		@Query("SELECT name FROM legoset")
 		Flux<Named> findAsProjection();
 
 		@Override

src/test/java/org/springframework/data/r2dbc/repository/SqlServerR2dbcRepositoryIntegrationTests.java

@@ -90,7 +90,7 @@ public class SqlServerR2dbcRepositoryIntegrationTests extends AbstractR2dbcRepos
 		Flux<LegoSet> findByNameContains(String name);
 
 		@Override
-		@Query("SELECT * FROM legoset")
+		@Query("SELECT name FROM legoset")
 		Flux<Named> findAsProjection();
 
 		@Override