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Fix update in case of a nested $elemMatch #376

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Fix update in case of a nested $elemMatch #376

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b5e9856
Failed to handle positional update for entire element
mincong-h Mar 29, 2020
5c2ec04
Fix nested when postPath is empty
mincong-h Mar 29, 2020
6ba3d7c
Rename tests
mincong-h Mar 29, 2020
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6 changes: 5 additions & 1 deletion src/main/java/com/github/fakemongo/impl/UpdateEngine.java
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Original file line number Diff line number Diff line change
Expand Up @@ -136,7 +136,11 @@ public void handlePositionalUpdate(final String updateKey, Object object, List v
} else {
//this is kind of a waste
DBObject o = ExpressionParser.isDbObject(listItem) ? ExpressionParser.toDbObject(listItem) : new BasicDBObject(prePath, listItem);
if (filter.apply(o)) {
BasicDBList listWithSingleItem = new BasicDBList();
listWithSingleItem.add(listItem);
if (filter.apply(o) ||
//Case of a nested $elemMatch
filter.apply(new BasicDBObject(prePath, listWithSingleItem))) {
BasicDBList newList = new BasicDBList();
newList.addAll(valueList);
//do not put any data on ownerObj, because the prePath can be composed of different parts
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28 changes: 24 additions & 4 deletions src/test/java/com/github/fakemongo/impl/UpdateEngineTest.java
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Expand Up @@ -413,10 +413,10 @@ public void testPositionalOperator() {
}

@Test
public void testPositionalOperatorWithElemMatch() {
public void testPositionalOperatorWithElemMatchWithPostPath() {
String random1 = UUID.randomUUID().toString();
String random2 = UUID.randomUUID().toString();

DBObject object = (DBObject) FongoJSON.parse("{ \"name\" : \"Tenant 1\", \"appAllocations\" : [ { \"appId\" : \""
+ random1 + "\" , \"maxUser\" : 4} , { \"appId\""
+ ": \"" + random2 + "\" , \"maxUser\" : 42}]}");
Expand All @@ -431,12 +431,32 @@ public void testPositionalOperatorWithElemMatch() {
assertEquals(expected.toString(),
updateEngine.doUpdate(object, update, query, false).toString());
}


@Test
public void testPositionalOperatorWithElemMatchWithoutPostPath() {
String random1 = UUID.randomUUID().toString();
String random2 = UUID.randomUUID().toString();

DBObject object = (DBObject) FongoJSON.parse("{ \"name\" : \"Tenant 1\", \"appAllocations\" : [ { \"appId\" : \""
+ random1 + "\" , \"maxUser\" : 4} , { \"appId\""
+ ": \"" + random2 + "\" , \"maxUser\" : 42}]}");
DBObject query = (DBObject) FongoJSON.parse("{ \"appAllocations\" : { \"$elemMatch\" : { \"appId\" : \"" + random1 + "\"}}}");
DBObject update = (DBObject) FongoJSON.parse("{ \"$set\" : { \"appAllocations.$\" : { \"appId\" : \"" + random1 + "\", \"maxUser\" : 9 }}}");

DBObject expected = (DBObject) FongoJSON.parse("{ \"name\" : \"Tenant 1\", \"appAllocations\" : [ { \"appId\" : \""
+ random1 + "\" , \"maxUser\" : 9} , { \"appId\""
+ ": \"" + random2 + "\" , \"maxUser\" : 42}]}");
UpdateEngine updateEngine = new UpdateEngine();

assertEquals(expected.toString(),
updateEngine.doUpdate(object, update, query, false).toString());
}

@Test
public void testAddOrReplaceElementMustWorkWithDollarOperator() {
String random1 = UUID.randomUUID().toString();
String random2 = UUID.randomUUID().toString();

DBObject object = (DBObject) FongoJSON.parse("{ \"_id\" : \"1234\" , \"var1\" : \"val1\" , \"parentObject\" : { \"var2\" : \"val21\" , \"subObject\" : [ { \"_id\" : \"" + random1 + "\" , \"var3\" : \"val31\"}, { \"_id\" : \"" + random2 + "\" , \"var3\" : \"val32\"}]}}");
DBObject update = (DBObject) FongoJSON.parse("{ \"$set\" : { \"parentObject.subObject.$\" : { \"_id\" : \"" + random1 + "\" , \"var3\" : \"val33\"}}}");
DBObject query = (DBObject) FongoJSON.parse("{ \"_id\" : \"1234\" , \"parentObject.subObject._id\" : \"" + random1 + "\"}");
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