Also unsubscribe from any children (#2120)

api/resolvers/item.js

@@ -838,8 +838,16 @@ export default {
       const data = { itemId: Number(id), userId: me.id }
       const old = await models.threadSubscription.findUnique({ where: { userId_itemId: data } })
       if (old) {
-        await models.threadSubscription.delete({ where: { userId_itemId: data } })
-      } else await models.threadSubscription.create({ data })
+        await models.$executeRaw`
+          DELETE FROM "ThreadSubscription" ts
+          USING "Item" i
+          WHERE ts."userId" = ${me.id}
+          AND i.path <@ (SELECT path FROM "Item" WHERE id = ${Number(id)})
+          AND ts."itemId" = i.id
+        `
+      } else {
+        await models.threadSubscription.create({ data })
+      }
       return { id }
     },
     deleteItem: async (parent, { id }, { me, models }) => {

components/subscribe.js

@@ -20,6 +20,25 @@ export default function SubscribeDropdownItem ({ item: { id, meSubscription } })
           },
           optimistic: true
         })
+
+        const unsubscribed = !subscribeItem.meSubscription
+        if (!unsubscribed) return
+
+        const cacheState = cache.extract()
+        Object.keys(cacheState)
+          .filter(key => key.startsWith('Item:'))
+          .forEach(key => {
+            cache.modify({
+              id: key,
+              fields: {
+                meSubscription: (existing, { readField }) => {
+                  const path = readField('path')
+                  return !path || !path.includes(id) ? existing : false
+                }
+              },
+              optimistic: true
+            })
+          })
       }
     }
   )