修改bug

cloudfunctions/postLike/index.js

@@ -3,22 +3,63 @@ const cloud = require('wx-server-sdk')
 cloud.init({ env: cloud.DYNAMIC_CURRENT_ENV })
 const db = cloud.database()
 const _ = db.command
+const POST_LIKES_COLLECTION = 'postLikes'
+
+function isCollectionMissing(error) {
+  const text = String(error?.errMsg || error?.message || error || '')
+  return (
+    text.includes('collection not exist') ||
+    text.includes('collection not exists') ||
+    text.includes('collection is not exists') ||
+    text.includes('DATABASE_COLLECTION_NOT_EXIST') ||
+    text.includes('-502005')
+  )
+}
+
+function isCollectionAlreadyExists(error) {
+  const text = String(error?.errMsg || error?.message || error || '')
+  return text.includes('collection already exists') || text.includes('DATABASE_COLLECTION_ALREADY_EXIST')
+}
+
+async function ensurePostLikesCollection() {
+  if (typeof db.createCollection !== 'function') {
+    throw new Error('postLikes collection does not exist')
+  }
+
+  try {
+    await db.createCollection(POST_LIKES_COLLECTION)
+  } catch (error) {
+    if (!isCollectionAlreadyExists(error)) throw error
+  }
+}
+
+async function getExistingLike(postId, openid) {
+  try {
+    return await db.collection(POST_LIKES_COLLECTION).where({ postId, openid }).limit(1).get()
+  } catch (error) {
+    if (!isCollectionMissing(error)) throw error
+    await ensurePostLikesCollection()
+    return { data: [] }
+  }
+}
 
 exports.main = async event => {
   const { OPENID } = cloud.getWXContext()
   const { postId, liked } = event
+  if (!OPENID) throw new Error('no openid in wx context')
   if (!postId) throw new Error('postId is required')
 
-  const existed = await db.collection('postLikes').where({ postId, openid: OPENID }).limit(1).get()
+  const existed = await getExistingLike(postId, OPENID)
+  const collection = db.collection(POST_LIKES_COLLECTION)
   let delta = 0
 
   if (liked && !existed.data.length) {
-    await db.collection('postLikes').add({ data: { postId, openid: OPENID, createdAt: Date.now() } })
+    await collection.add({ data: { postId, openid: OPENID, createdAt: Date.now() } })
     delta = 1
   }
 
   if (!liked && existed.data.length) {
-    await db.collection('postLikes').doc(existed.data[0]._id).remove()
+    await collection.doc(existed.data[0]._id).remove()
     delta = -1
   }
 
@@ -29,4 +70,3 @@ exports.main = async event => {
   const post = await db.collection('posts').doc(postId).get()
   return { liked: Boolean(liked), likes: post.data.counts?.likes || 0 }
 }
-