add exists query for fields

cms-api/src/main/java/com/condation/cms/api/db/ContentQuery.java

@@ -64,6 +64,8 @@ public interface ContentQuery<T> {
 	ContentQuery<T> whereNotIn(final String field, final Object... value);
 
 	ContentQuery<T> whereNotIn(final String field, final List<Object> value);
+
+	ContentQuery<T> whereExists(final String field);
 
 	public static interface Sort<T> {
 		public ContentQuery<T> asc();

cms-filesystem/src/main/java/com/condation/cms/filesystem/metadata/memory/MemoryQuery.java

@@ -111,6 +111,11 @@ public MemoryQuery<T> whereNotIn(final String field, final List<Object> value) {
 		return where(field, Queries.Operator.NOT_IN, value);
 	}
 
+	@Override
+	public MemoryQuery<T> whereExists(final String field) {
+		return new MemoryQuery<>(QueryUtil.exists(context, field));
+	}
+
 	private MemoryQuery<T> where(final String field, final Queries.Operator operator, final Object value) {
 		return new MemoryQuery<>(filtered(context, field, value, operator));
 	}

cms-filesystem/src/main/java/com/condation/cms/filesystem/metadata/memory/QueryUtil.java

@@ -21,7 +21,6 @@
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
  * #L%
  */
-
 import com.condation.cms.api.db.ContentNode;
 import com.condation.cms.api.utils.MapUtil;
 import com.condation.cms.filesystem.metadata.query.Queries;
@@ -40,8 +39,6 @@
 @Slf4j
 public final class QueryUtil {
 
-
-
 	public static Map<Object, List<ContentNode>> groupby(final Stream<ContentNode> nodes, final String field) {
 		return nodes.collect(Collectors.groupingBy((node) -> MapUtil.getValue(node.data(), field)));
 	}
@@ -66,6 +63,14 @@ protected static <T extends ContentNode> QueryContext<T> sorted(final QueryConte
 		return context;
 	}
 
+	public static QueryContext exists(final QueryContext context, final String field) {
+		context.setNodes(context.getNodes().filter((node) -> {
+			var node_value = MapUtil.getValue(((ContentNode)node).data(), field);
+			return node_value != null;
+		}));
+		return context;
+	}
+
 	public static QueryContext filtered(final QueryContext context, final String field, final Object value, final Queries.Operator operator) {
 		context.setNodes(context.getNodes().filter(createPredicate(field, value, operator)));
 		return context;
@@ -92,7 +97,4 @@ protected static QueryContext filter_extension(final QueryContext context, final
 		context.setNodes(context.getNodes().filter(Queries.createExtensionPredicate(field, value, predicate)));
 		return context;
 	}
-
-
-
 }

cms-filesystem/src/main/java/com/condation/cms/filesystem/metadata/persistent/LuceneQuery.java

@@ -269,10 +269,16 @@ public ContentQuery<T> whereNotIn(String field, Object... value) {
 	public ContentQuery<T> whereNotIn(String field, List<Object> value) {
 		return where(field, Queries.Operator.NOT_IN, value);
 	}
+
+	@Override
+	public ContentQuery<T> whereExists(String field) {
+		QueryHelper.exists(queryBuilder, field);
+		return this;
+	}
 
 	private ContentQuery<T> where(final String field, final Queries.Operator operator, final Object value) {
 
-		QueryHelper.exists(queryBuilder, field, value);
+		QueryHelper.exists(queryBuilder, field);
 
 		switch (operator) {
 			case EQ ->

cms-filesystem/src/main/java/com/condation/cms/filesystem/metadata/persistent/QueryHelper.java

@@ -47,7 +47,7 @@
 @Slf4j
 public class QueryHelper {
 
-	public static void exists(BooleanQuery.Builder queryBuilder, String field, Object value) {
+	public static void exists(BooleanQuery.Builder queryBuilder, String field) {
 
 		if (true) {
 			queryBuilder.add(

cms-filesystem/src/test/java/com/condation/cms/filesystem/PresistentFileSystemTest.java

@@ -118,6 +118,19 @@ public void test_query_with_start_uri() throws IOException {
 		Assertions.assertThat(nodes.getFirst().uri()).isEqualTo("test/test1.md");
 	}
 
+	@Test
+	public void test_field_exists() throws IOException {
+
+		var nodes = fileSystem.query("/test", (node, i) -> node).whereExists("keywords").get();
+
+		Assertions.assertThat(nodes).hasSize(1);
+		Assertions.assertThat(nodes.getFirst().uri()).isEqualTo("test/test1.md");
+
+		nodes = fileSystem.query((node, i) -> node).whereExists("keywords").get();
+
+		Assertions.assertThat(nodes).hasSize(2);
+	}
+
 	@Test
 	public void test_custom_operation() throws IOException {
 

cms-filesystem/src/test/java/com/condation/cms/filesystem/query/QueryTest.java

@@ -290,4 +290,11 @@ public void test_where_not_null() {
 		query.where("index", "=", null).get();
 		Assertions.assertThat(nodes).hasSize(2);
 	}
+
+	@Test
+	public void test_where_exists() {
+		MemoryQuery<ContentNode> query = createQuery();
+		var nodes = query.whereExists("index").get();
+		Assertions.assertThat(nodes).hasSize(2);
+	}
 }

cms-filesystem/src/test/resources/content/index.md

@@ -1,3 +1,4 @@
 featured: true
 publish_date: 2024-09-23
-name: start
+name: start
+keywords: ["eins", "zwei"]

cms-filesystem/src/test/resources/content/test/test1.md

@@ -4,4 +4,5 @@ taxonomy:
     tags: [eins, zwei]
 number1: 1
 number2: 5
-publish_date: 2024-10-01
+publish_date: 2024-10-01
+keywords: ["eins", "zwei"]