DATACOUCH-620 - Fix nested object id/@Id issue.

src/main/java/org/springframework/data/couchbase/core/convert/MappingCouchbaseConverter.java

@@ -402,7 +402,7 @@ public void write(final Object source, final CouchbaseDocument target) {
 			typeMapper.writeType(type, target);
 		}
 
-		writeInternal(source, target, type);
+		writeInternal(source, target, type, true);
 		if (target.getId() == null) {
 			throw new MappingException("An ID property is needed, but not found/could not be generated on this entity.");
 		}
@@ -416,7 +416,8 @@ public void write(final Object source, final CouchbaseDocument target) {
 	 * @param typeHint the type information for the source.
 	 */
 	@SuppressWarnings("unchecked")
-	protected void writeInternal(final Object source, CouchbaseDocument target, final TypeInformation<?> typeHint) {
+	protected void writeInternal(final Object source, CouchbaseDocument target, final TypeInformation<?> typeHint,
+			boolean withId) {
 		if (source == null) {
 			return;
 		}
@@ -437,7 +438,7 @@ protected void writeInternal(final Object source, CouchbaseDocument target, fina
 		}
 
 		CouchbasePersistentEntity<?> entity = mappingContext.getPersistentEntity(source.getClass());
-		writeInternal(source, target, entity);
+		writeInternal(source, target, entity, withId);
 		addCustomTypeKeyIfNecessary(typeHint, source, target);
 	}
 
@@ -471,9 +472,10 @@ private String convertToString(Object propertyObj) {
 	 * @param source the source object.
 	 * @param target the target document.
 	 * @param entity the persistent entity to convert from.
+	 * @param withId one of the top-level properties is the id for the document
 	 */
 	protected void writeInternal(final Object source, final CouchbaseDocument target,
-			final CouchbasePersistentEntity<?> entity) {
+			final CouchbasePersistentEntity<?> entity, boolean withId) {
 		if (source == null) {
 			return;
 		}
@@ -483,7 +485,7 @@ protected void writeInternal(final Object source, final CouchbaseDocument target
 		}
 
 		final ConvertingPropertyAccessor<Object> accessor = getPropertyAccessor(source);
-		final CouchbasePersistentProperty idProperty = entity.getIdProperty();
+		final CouchbasePersistentProperty idProperty = withId ? entity.getIdProperty() : null;
 		final CouchbasePersistentProperty versionProperty = entity.getVersionProperty();
 
 		GeneratedValue generatedValueInfo = null;
@@ -525,7 +527,7 @@ public void doWithPersistentProperty(final CouchbasePersistentProperty prop) {
 					}
 
 					if (!conversions.isSimpleType(propertyObj.getClass())) {
-						writePropertyInternal(propertyObj, target, prop);
+						writePropertyInternal(propertyObj, target, prop, false);
 					} else {
 						writeSimpleInternal(propertyObj, target, prop.getFieldName());
 					}
@@ -552,7 +554,7 @@ public void doWithAssociation(final Association<CouchbasePersistentProperty> ass
 				Class<?> type = inverseProp.getType();
 				Object propertyObj = accessor.getProperty(inverseProp, type);
 				if (null != propertyObj) {
-					writePropertyInternal(propertyObj, target, inverseProp);
+					writePropertyInternal(propertyObj, target, inverseProp, false);
 				}
 			}
 		});
@@ -568,7 +570,7 @@ public void doWithAssociation(final Association<CouchbasePersistentProperty> ass
 	 */
 	@SuppressWarnings("unchecked")
 	private void writePropertyInternal(final Object source, final CouchbaseDocument target,
-			final CouchbasePersistentProperty prop) {
+			final CouchbasePersistentProperty prop, boolean withId) {
 		if (source == null) {
 			return;
 		}
@@ -617,7 +619,7 @@ private void writePropertyInternal(final Object source, final CouchbaseDocument
 		CouchbasePersistentEntity<?> entity = isSubtype(prop.getType(), source.getClass())
 				? mappingContext.getRequiredPersistentEntity(source.getClass())
 				: mappingContext.getRequiredPersistentEntity(type);
-		writeInternal(source, propertyDoc, entity);
+		writeInternal(source, propertyDoc, entity, false);
 		target.put(name, propertyDoc);
 	}
 
@@ -660,7 +662,7 @@ private CouchbaseDocument writeMapInternal(final Map<Object, Object> source, fin
 				} else {
 					CouchbaseDocument embeddedDoc = new CouchbaseDocument();
 					TypeInformation<?> valueTypeInfo = type.isMap() ? type.getMapValueType() : ClassTypeInformation.OBJECT;
-					writeInternal(val, embeddedDoc, valueTypeInfo);
+					writeInternal(val, embeddedDoc, valueTypeInfo, false);
 					target.put(simpleKey, embeddedDoc);
 				}
 			} else {
@@ -706,7 +708,7 @@ private CouchbaseList writeCollectionInternal(final Collection<?> source, final
 			} else {
 
 				CouchbaseDocument embeddedDoc = new CouchbaseDocument();
-				writeInternal(element, embeddedDoc, componentType);
+				writeInternal(element, embeddedDoc, componentType, false);
 				target.put(embeddedDoc);
 			}
 
@@ -937,7 +939,7 @@ public <R> R getPropertyValue(final CouchbasePersistentProperty property) {
 			String expression = property.getSpelExpression();
 			Object value = expression != null ? evaluator.evaluate(expression) : source.get(property.getFieldName());
 
-			if (property.isIdProperty()) {
+			if (property.isIdProperty() && parent == null) {
 				return (R) source.getId();
 			}
 			if (value == null) {

src/test/java/org/springframework/data/couchbase/domain/Course.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2020 the original author or authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.couchbase.domain;
+
+import org.springframework.data.annotation.Id;
+
+import java.lang.reflect.Field;
+
+/**
+ * Course entity for tests
+ *
+ * @author Michael Reiche
+ */
+public class Course {
+	@Id private final String id;
+	private final String userId;
+	private final String room;
+
+	public Course(String id, String userId, String room) {
+		this.id = id;
+		this.userId = userId;
+		this.room = room;
+	}
+
+	public String getId() {
+		return id;
+	}
+
+	public String toString() {
+		StringBuffer sb = new StringBuffer("Course(");
+		sb.append("id=");
+		sb.append(id);
+		sb.append(", userId=");
+		sb.append(userId);
+		sb.append(", room=");
+		sb.append(room);
+		sb.append(")");
+		return sb.toString();
+	}
+
+	@Override
+	public boolean equals(Object that) throws RuntimeException {
+		if (this == that)
+			return true;
+		if (that == null || getClass() != that.getClass())
+			return false;
+		for (Field f : getClass().getFields()) {
+			if (!same(f, this, that))
+				return false;
+		}
+		for (Field f : getClass().getDeclaredFields()) {
+			if (!same(f, this, that))
+				return false;
+		}
+		return true;
+	}
+
+	private static boolean same(Field f, Object a, Object b) {
+		Object thisField = null;
+		Object thatField = null;
+
+		try {
+			f.get(a);
+			f.get(b);
+		} catch (IllegalAccessException e) {
+			throw new RuntimeException(e);
+		}
+		if (thisField == null && thatField == null) {
+			return true;
+		}
+		if (thisField == null && thatField != null) {
+			return false;
+		}
+		if (!thisField.equals(thatField)) {
+			return false;
+		}
+		return true;
+	}
+}

src/test/java/org/springframework/data/couchbase/domain/Submission.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2020 the original author or authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.couchbase.domain;
+
+import java.lang.reflect.Field;
+
+/**
+ * Submission entity for tests
+ *
+ * @author Michael Reiche
+ */
+public class Submission {
+	private final String id;
+	private final String userId;
+	private final String talkId;
+	private final String status;
+	private final long number;
+
+	public Submission(String id, String userId, String talkId, String status, long number) {
+		this.id = id;
+		this.userId = userId;
+		this.talkId = talkId;
+		this.status = status;
+		this.number = number;
+	}
+
+	public String getId() {
+		return id;
+	}
+
+	public String toString() {
+		StringBuffer sb = new StringBuffer("Submission(");
+		sb.append("id=");
+		sb.append(id);
+		sb.append(", userId=");
+		sb.append(userId);
+		sb.append(", talkId=");
+		sb.append(talkId);
+		sb.append(", status=");
+		sb.append(status);
+		sb.append(", number=");
+		sb.append(number);
+		sb.append(")");
+		return sb.toString();
+	}
+
+	@Override
+	public boolean equals(Object that) throws RuntimeException {
+		if (this == that)
+			return true;
+		if (that == null || getClass() != that.getClass())
+			return false;
+		for (Field f : getClass().getFields()) {
+			if (!same(f, this, that))
+				return false;
+		}
+		for (Field f : getClass().getDeclaredFields()) {
+			if (!same(f, this, that))
+				return false;
+		}
+		return true;
+	}
+
+	private static boolean same(Field f, Object a, Object b) {
+		Object thisField = null;
+		Object thatField = null;
+
+		try {
+			f.get(a);
+			f.get(b);
+		} catch (IllegalAccessException e) {
+			throw new RuntimeException(e);
+		}
+		if (thisField == null && thatField == null) {
+			return true;
+		}
+		if (thisField == null && thatField != null) {
+			return false;
+		}
+		if (!thisField.equals(thatField)) {
+			return false;
+		}
+		return true;
+	}
+}

src/test/java/org/springframework/data/couchbase/domain/UserSubmission.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2012-2020 the original author or authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *        https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.data.couchbase.domain;
+
+import lombok.Data;
+import org.springframework.data.annotation.TypeAlias;
+import org.springframework.data.couchbase.core.index.CompositeQueryIndex;
+import org.springframework.data.couchbase.core.mapping.Document;
+
+import java.lang.reflect.Field;
+import java.util.List;
+
+/**
+ * UserSubmission entity for tests
+ *
+ * @author Michael Reiche
+ */
+@Data
+@Document
+@TypeAlias("user")
+@CompositeQueryIndex(fields = { "id", "username", "email" })
+public class UserSubmission {
+	private String id;
+	private String username;
+	private String email;
+	private String password;
+	private List<String> roles;
+	private Address address;
+	private int credits;
+	private List<Submission> submissions;
+	private List<Course> courses;
+
+	public void setSubmissions(List<Submission> submissions) {
+		this.submissions = submissions;
+	}
+
+	public void setCourses(List<Course> courses) {
+		this.courses = courses;
+	}
+
+	@Override
+	public boolean equals(Object that) throws RuntimeException {
+		if (this == that)
+			return true;
+		if (that == null || getClass() != that.getClass())
+			return false;
+		for (Field f : getClass().getFields()) {
+			if (!same(f, this, that))
+				return false;
+		}
+		for (Field f : getClass().getDeclaredFields()) {
+			if (!same(f, this, that))
+				return false;
+		}
+		return true;
+	}
+
+	private static boolean same(Field f, Object a, Object b) {
+		Object thisField = null;
+		Object thatField = null;
+
+		try {
+			f.get(a);
+			f.get(b);
+		} catch (IllegalAccessException e) {
+			throw new RuntimeException(e);
+		}
+		if (thisField == null && thatField == null) {
+			return true;
+		}
+		if (thisField == null && thatField != null) {
+			return false;
+		}
+		if (!thisField.equals(thatField)) {
+			return false;
+		}
+		return true;
+	}
+}