We now support $cond and $ifNull operators for projection and grouping operations. ConditionalOperator and IfNullOperators are AggregationExpressions that can be applied to transform or generate values during aggregation.
TypedAggregation<InventoryItem> agg = newAggregation(InventoryItem.class,
project().and("discount")
.transform(ConditionalOperator.newBuilder().when(Criteria.where("qty").gte(250))
.then(30)
.otherwise(20))
.and(ifNull("description", "Unspecified")).as("description")
);
corresponds to
{ "$project": { "discount": { "$cond": { "if": { "$gte": [ "$qty", 250 ] },
"then": 30, "else": 20 } },
"description": { "$ifNull": [ "$description", "Unspecified"] }
}
}
Original Pull Request: #385
We now propagate the PersistentEntity when mapping nested keywords so that the criteria mapping chain for nested keywords and properties has now access to the PersistentEntity and can use configured field names.
Previously the plain property names have been used as field names and potential customizations via @Field have been ignored.
Original Pull Request: #384
Replace boolean flag in convertAndJoinScriptArgs with literal. Joined args are rendered to JavaScript and require always string quotation.
Original pull request: #383.
Setting the value for the identifier property is an explicit step in MappingMongoConverter and always executed if the type to be created has an identifier property. If the source document doesn't contain an _id field (e.g. because it has been excluded explicitly) that previously caused null to be set on the identifier. This caused an exception if the identifier property is a primitive type.
We now explicitly check whether the field backing the identifier property is actually present in the source document and only explicitly set the value if so.
Introduced AbstractMongoConfiguration.getMappingBasePackages() to return multiple ones over the previously existing ….getMappingBasePackage(). The former is now used by the code triggering the scanning using what the latter returns by default.
We now allow direct usage path.eq(…) on id properties of db referenced objects. This allows to write the query as person.coworker.id.eq(coworker.getId()) instead of person.coworker.eq(coworker). This helps building the query using just the plain id not having to actually create new object wrapping it.
Original pull request: #373.
We bulk load maps of referenced objects as long as they are stored in the same collection. This reduces database roundtrips and network traffic.
Original pull request: #377.
We now bulk load collections of referenced objects as long as they are stored in the same collection. This reduces database roundtrips and network traffic.
Original pull request: #377.
We execute paged queries now in an optimized way. The data is obtained for each paged execution but the count query is deferred. We determine the total from the pageable and the results in which we don't hit the page size bounds (i.e. results are less than a full page without offset or results are greater 0 and less than a full page with offset). In all other cases we issue an additional count query.
Original pull request: #379.
MongoExampleMapper now $or-concatenates the predicates derived from the example in case the ExampleMatcher expresses any-match binding to be desired.
Moved integration tests for Query-by-example to the appropriate package and polished the code a little.
Related ticket: DATACMNS-879.
We added methods to set values for $caseSensitive and $diacriticSensitive when using TextCriteria. Both operators are optional and will not be used until explicitly set.
// { "$text" : { "$search" : "coffee" , "$caseSensitive" : true } }
TextCriteria.forDefaultLanguage().matching("coffee").caseSensitive(true);
// { "$text" : { "$search" : "coffee" , "$diacriticSensitive" : true } }
TextCriteria.forDefaultLanguage().matching("coffee").diacriticSensitive(true);
Original pull request: #375.
Moved newly introduced types into order. Added missing @since tag and additional test.
Updated reference documentation for update operators and added $slice operator to "what’s new" section.
Original Pull Request: #374
We now support $slice in Update operations via the PushOperatorBuilder.
new Update().push("key").slice(5).each(Arrays.asList("one", "two", "three"));
Original Pull Request: #374
We now support $slice in aggregation projections via the ProjectionOperationBuilder.
Aggregation.project().and("field").slice(10, 20)
Original pull request: #372.
We now support the $out operator via Aggregation.out(…) to store aggregation results in a collection. Using the $out operator returns an empty list in AggregationResults.
Original pull request: #361.
CLA: 172720160413124705 (Nikolai Bogdanov)
This should result in minor to moderate performance improvement for iteration on Collections/Arrays during DBObject to object mapping.
Original pull request: #368.
We now preserve the cause of Exceptions that cannot be translated into DataAccessExceptions when an error occurs during lazily loading DBRefs.
Original pull request: #367.
Fixed broken highlighting using backticks followed by chars/single quotes. Convert single quote emphasis of id to backtick code fences. Add missing spaces between words and backticks.
Original Pull Request: #359
Mark Paluch
Christoph Strobl
Niko Schmuck
Oliver Gierke
Nikolai Bogdanov
Kevin Dosey
Jordi Llach Fernandez