Spring/spring-data-mongodb
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

DATAMONGO-861 - Polishing.

Browse Source 
Favor usage of List over BasicDBList.
Rename ProjectionOperation.transform to applyCondition.
Add missing author and since tags, remove trailing white spaces and fix reference documentation headline clash.

Original Pull Request: #385
This commit is contained in:
Christoph Strobl
2016-08-25 14:44:36 +02:00
parent ace01e4e6d
commit eb1392cc1a
11 changed files with 199 additions and 170 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/main/asciidoc/reference/mongodb.adoc
View File

@@ -1988,8 +1988,8 @@ List<DBObject> resultList = result.getMappedResults();
Note that we can also refer to other fields of the document within the SpEL expression.
[[mongo.aggregation.examples.example6]]
.Aggregation Framework Example 6
[[mongo.aggregation.examples.example7]]
.Aggregation Framework Example 7
This example uses conditional projection. It's derived from the https://docs.mongodb.com/manual/reference/operator/aggregation/cond/[$cond reference documentation].
@@ -2019,7 +2019,7 @@ import static org.springframework.data.mongodb.core.aggregation.Aggregation.*;
TypedAggregation<InventoryItem> agg = newAggregation(InventoryItem.class,
project("item").and("discount")
.transform(ConditionalOperator.newBuilder().when(Criteria.where("qty").gte(250))
.applyCondition(ConditionalOperator.newBuilder().when(Criteria.where("qty").gte(250))
.then(30)
.otherwise(20))
.and(ifNull("description", "Unspecified")).as("description")
@@ -2029,7 +2029,7 @@ AggregationResults<InventoryItemProjection> result = mongoTemplate.aggregate(agg
List<InventoryItemProjection> stateStatsList = result.getMappedResults();
----
* This one-step aggregation uses a projection operation with the `inventory` collection. We project the `discount` field using a conditional transformation for all inventory items that have a `qty` greater or equal to `250`. An second conditional projection is performed for the `description` field. We apply the description `Unspecified` to all items that either do not have a `description` field of items that have a `null` description.
* This one-step aggregation uses a projection operation with the `inventory` collection. We project the `discount` field using a conditional operation for all inventory items that have a `qty` greater or equal to `250`. An second conditional projection is performed for the `description` field. We apply the description `Unspecified` to all items that either do not have a `description` field of items that have a `null` description.
[[mongo.custom-converters]]