---

src/loaders/createApplicationStatusLoader.ts

@@ -0,0 +1,15 @@
+import orm from '@src/type-orm.source'
+import DataLoader from 'dataloader'
+
+export const createApplicationStatusLoader = () =>
+  new DataLoader<{ offerId: number, userId: number }, String | null>(async (keys) => {
+    const applications: { id: number, offerId: number, userId: number, status: string }[] = await orm.createQueryBuilder()
+      .select('*')
+      .from('offer_application', 'oa')
+      .orWhere(keys)
+      .execute()
+    return keys.map(key => {
+      const application = applications.find(a => a.offerId == key.offerId && a.userId == key.userId)
+      return application ? application.status : null
+    })
+  })