fix: add default relations to variants to include prices (#394)

packages/medusa/src/api/routes/store/variants/get-variant.js

@@ -1,3 +1,5 @@
+import { defaultRelations } from "."
+
 /**
  * @oas [get] /variants/{variant_id}
  * operationId: GetVariantsVariant
@@ -22,7 +24,10 @@ export default async (req, res) => {
 
   try {
     const variantService = req.scope.resolve("productVariantService")
-    let variant = await variantService.retrieve(id, { relations: ["prices"] })
+    let variant = await variantService.retrieve(id, {
+      relations: defaultRelations,
+    })
+
     res.json({ variant })
   } catch (error) {
     throw error

packages/medusa/src/api/routes/store/variants/index.js

@@ -11,3 +11,5 @@ export default app => {
 
   return app
 }
+
+export const defaultRelations = ["prices"]

packages/medusa/src/api/routes/store/variants/list-variants.js

@@ -1,3 +1,5 @@
+import { defaultRelations } from "."
+
 /**
  * @oas [get] /variants
  * operationId: GetVariants
@@ -23,10 +25,14 @@ export default async (req, res) => {
   const limit = parseInt(req.query.limit) || 100
   const offset = parseInt(req.query.offset) || 0
 
-  let selector = {}
+  let expandFields = []
+  if ("expand" in req.query) {
+    expandFields = req.query.expand.split(",")
+  }
 
+  let selector = {}
   const listConfig = {
-    relations: [],
+    relations: expandFields.length ? expandFields : defaultRelations,
     skip: offset,
     take: limit,
   }