fis(orchestration): Properly handle select all (#6742)

**What**
Fix select `*` without breaking select none `[]`

.changeset/cold-mice-deliver.md

@@ -0,0 +1,6 @@
+---
+"@medusajs/modules-sdk": patch
+"@medusajs/orchestration": patch
+---
+
+fix(orchestration): Properly handle select all

packages/modules-sdk/src/__tests__/remote-quer.spec.ts

@@ -0,0 +1,31 @@
+import { RemoteQuery } from "../remote-query"
+
+describe("Remote query", () => {
+  it("should properly handle fields and relations transformation", () => {
+    const expand = {
+      fields: ["name", "age"],
+      expands: {
+        friend: {
+          fields: ["name"],
+          expands: {
+            ball: {
+              fields: ["*"],
+            },
+          },
+        },
+      },
+    }
+
+    const result = RemoteQuery.getAllFieldsAndRelations(expand)
+
+    expect(result).toEqual({
+      select: ["name", "age", "friend.name"],
+      relations: ["friend", "friend.ball"],
+      args: {
+        "": undefined,
+        friend: undefined,
+        "friend.ball": undefined,
+      },
+    })
+  })
+})

packages/modules-sdk/src/remote-query.ts

@@ -4,12 +4,14 @@ import {
   toRemoteJoinerQuery,
 } from "@medusajs/orchestration"
 import {
+  JoinerArgument,
   JoinerRelationship,
   JoinerServiceConfig,
   LoadedModule,
   ModuleJoinerConfig,
   RemoteExpandProperty,
   RemoteJoinerQuery,
+  RemoteNestedExpands,
 } from "@medusajs/types"
 import { isString, toPascalCase } from "@medusajs/utils"
 
@@ -78,35 +80,37 @@ export class RemoteQuery {
   }
 
   public static getAllFieldsAndRelations(
-    data: any,
+    expand: RemoteExpandProperty | RemoteNestedExpands[number],
     prefix = "",
-    args: Record<string, unknown[]> = {}
+    args: JoinerArgument = {} as JoinerArgument
   ): {
     select: string[]
     relations: string[]
-    args: Record<string, unknown[]>
+    args: JoinerArgument
   } {
+    expand = JSON.parse(JSON.stringify(expand))
+
     let fields: Set<string> = new Set()
     let relations: string[] = []
 
-    data.fields?.forEach((field: string) => {
+    for (const field of expand.fields ?? []) {
       if (field === "*") {
-        // Select all, so we don't specify any field and rely on relation only
+        expand.fields = []
-        return
+        break
       }
       fields.add(prefix ? `${prefix}.${field}` : field)
-    })
+    }
-    args[prefix] = data.args
 
-    if (data.expands) {
+    args[prefix] = expand.args
-      for (const property in data.expands) {
+
+    for (const property in expand.expands ?? {}) {
       const newPrefix = prefix ? `${prefix}.${property}` : property
 
       relations.push(newPrefix)
       fields.delete(newPrefix)
 
       const result = RemoteQuery.getAllFieldsAndRelations(
-          data.expands[property],
+        expand.expands![property],
         newPrefix,
         args
       )
@@ -114,7 +118,6 @@ export class RemoteQuery {
       result.select.forEach(fields.add, fields)
       relations = relations.concat(result.relations)
     }
-    }
 
     return { select: [...fields], relations, args }
   }

packages/orchestration/src/joiner/remote-joiner.ts

@@ -45,6 +45,7 @@ export class RemoteJoiner {
     let filteredData: Record<string, unknown> = {}
 
     if (fields.includes("*")) {
+      // select all fields
       filteredData = data
     } else {
       filteredData = fields.reduce((acc: any, field: string) => {