some changes

src/main/kotlin/com/restapi/controllers/Entities.kt

@@ -10,6 +10,7 @@ import com.restapi.domain.Session.currentUser
 import com.restapi.domain.Session.database
 import com.restapi.domain.Session.findDataModelByEntityAndUniqId
 import com.restapi.integ.Scripting
+import com.restapi.integ.logger
 import io.ebean.CallableSql
 import io.ebean.RawSqlBuilder
 import io.javalin.http.*
@@ -379,8 +380,8 @@ object PurchaseOrderCtrl {
 
     fun getNextNum(ctx: Context) {
         val prefix = "PO/"
-        val cnt = database.find(PurchaseOrder::class.java)
-            .findCount()
+        val cnt = (database.find(PurchaseOrder::class.java)
+            .findCount() + 1)
             .toString()
             .padStart(6, '0')
         val seq = SequenceNumber(prefix + cnt)
@@ -499,7 +500,27 @@ object ProductCtrl {
     }
 
     data class PF(val common: CommonFilters, val productFilters: ProductFilters)
+    data class GetPrice(val productId: Long, val vendor: Any)
+    fun getPrice(ctx: Context){
+        val gp = ctx.bodyAsClass<GetPrice>()
+        val vendor = database.find(Vendor::class.java, gp.vendor) ?: throw BadRequestResponse("vendor not found for ${gp.vendor}")
+        val product = database.find(Product::class.java, gp.productId) ?: throw BadRequestResponse("product not found for ${gp.productId}")
+        val poProduct = database.find(PurchaseOrder::class.java)
+            .where()
+            .eq("vendor", vendor)
+            .findList()
+            .flatMap {
+                it.products
+            }
+            .firstOrNull {
+                it.productId == product.sysPk
+            }
 
+        ctx.json(
+            poProduct ?: throw BadRequestResponse("price not found for this vendor and product")
+        )
+
+    }
     fun getAll(ctx: Context) {
         val filters = ctx.bodyAsClass<PF>()
         val prods = searchProducts(filters.common, filters.productFilters)