cristianprofile / spring-data-mongo-aggretions-lear

Spring data mongo project to learn unwind and lookup aggregations operation

Spring data mongo example using unwind and lookup aggregations

This projects was created to be able to learn how to use unwind and lookup aggregations using Spring data mongo. I use Kotlin for the faster prototype. Data Model classes in mongo:

@Document
data class Order (
@Id
val id: String? = null,
val item: String,
val prices: MutableList<Price> = mutableListOf(),
val comments: MutableList<Comment> = mutableListOf())

data class Price (
val date: LocalDateTime = LocalDateTime.now(),
val value: Int = 8)

data class Comment (
val date: LocalDateTime = LocalDateTime.now(),
val value: Int = 8)

@Document
data class Delivery (
@Id
val id: String? = null,
val orderId: String,
val code: String)

Application use mongo database in memory (flapdoodle) to be able to test 2 functions:

• findByOrderListUnwind get all orders only adding the first comment a and prices ordered by date desc

• findByDeliveryJoinOrder get all deliveries creating a join sql like operation using lookup