修复动态发布与互动问题

cloudfunctions/locationUpdate/index.js

@@ -5,17 +5,36 @@ const db = cloud.database()
 
 exports.main = async event => {
   const { OPENID } = cloud.getWXContext()
+
+  // Reading a non-existent collection throws in WeChat 云开发, and this function
+  // starts with a read — so the collection would never get created by the later
+  // add(). Create it up-front (no-op if it already exists) to break that deadlock.
+  try {
+    await db.createCollection('locations')
+  } catch (e) {
+    // -501001 / "already exists" is expected on every call after the first.
+  }
+
   const now = Date.now()
+  const loc = event.location || null
+  const visible = Boolean(event.visible)
+  const hasCoord = loc && typeof loc.latitude === 'number' && typeof loc.longitude === 'number'
+
   const data = {
     openid: OPENID,
-    location: event.location || null,
-    visible: Boolean(event.visible),
+    location: hasCoord ? { latitude: loc.latitude, longitude: loc.longitude } : null,
+    // `nearbyPets` currently filters by distance in memory off `location`, so the
+    // `visible` flag below is what gates discovery. `geo` is kept (Point form) only
+    // to enable a future geoNear migration if the user base outgrows the in-memory
+    // scan — it needs a manually-created geo index to be queried.
+    geo: hasCoord && visible ? db.Geo.Point(loc.longitude, loc.latitude) : null,
+    visible,
     updatedAt: now
   }
+
   const existed = await db.collection('locations').where({ openid: OPENID }).limit(1).get()
   if (existed.data.length) await db.collection('locations').doc(existed.data[0]._id).update({ data })
   else await db.collection('locations').add({ data })
 
   return { ok: true }
 }
-