fix: #8954, clear purged replies and toPids (#8959)

* fix: #8954, clear purged replies and toPids

* fix: redis test

src/database/mongo/hash.js

@@ -149,7 +149,7 @@ module.exports = function (module) {
 	};
 
 	module.deleteObjectFields = async function (key, fields) {
-		if (!key || !Array.isArray(fields) || !fields.length) {
+		if (!key || (Array.isArray(key) && !key.length) || !Array.isArray(fields) || !fields.length) {
 			return;
 		}
 		fields = fields.filter(Boolean);
@@ -162,8 +162,12 @@ module.exports = function (module) {
 			field = helpers.fieldToString(field);
 			data[field] = '';
 		});
-
+		if (Array.isArray(key)) {
+			await module.client.collection('objects').updateMany({ _key: { $in: key } }, { $unset: data });
+		} else {
 			await module.client.collection('objects').updateOne({ _key: key }, { $unset: data });
+		}
+
 		cache.del(key);
 	};
 

src/database/postgres/hash.js

@@ -247,10 +247,10 @@ SELECT (h."data" ? $2::TEXT AND h."data"->>$2::TEXT IS NOT NULL) b
 	};
 
 	module.deleteObjectFields = async function (key, fields) {
-		if (!key || !Array.isArray(fields) || !fields.length) {
+		if (!key || (Array.isArray(key) && !key.length) || !Array.isArray(fields) || !fields.length) {
 			return;
 		}
-
+		async function delKey(key, fields) {
 			await module.pool.query({
 				name: 'deleteObjectFields',
 				text: `
@@ -261,6 +261,12 @@ UPDATE "legacy_hash"
 	 WHERE "_key" = $1::TEXT`,
 				values: [key, fields],
 			});
+		}
+		if (Array.isArray(key)) {
+			await Promise.all(key.map(k => delKey(k, fields)));
+		} else {
+			await delKey(key, fields);
+		}
 	};
 
 	module.incrObjectField = async function (key, field) {

src/database/redis/hash.js

@@ -150,14 +150,21 @@ module.exports = function (module) {
 	};
 
 	module.deleteObjectFields = async function (key, fields) {
-		if (!key || !Array.isArray(fields) || !fields.length) {
+		if (!key || (Array.isArray(key) && !key.length) || !Array.isArray(fields) || !fields.length) {
 			return;
 		}
 		fields = fields.filter(Boolean);
 		if (!fields.length) {
 			return;
 		}
+		if (Array.isArray(key)) {
+			const batch = module.client.batch();
+			key.forEach(k => batch.hdel(k, fields));
+			await helpers.execBatch(batch);
+		} else {
 			await module.client.async.hdel(key, fields);
+		}
+
 		cache.del(key);
 	};
 

src/posts/delete.js

@@ -122,13 +122,18 @@ module.exports = function (Posts) {
 	}
 
 	async function deletePostFromReplies(postData) {
-		if (!parseInt(postData.toPid, 10)) {
-			return;
+		const replyPids = await db.getSortedSetMembers('pid:' + postData.pid + ':replies');
+		const promises = [
+			db.deleteObjectFields(
+				replyPids.map(pid => 'post:' + pid), ['toPid']
+			),
+			db.delete('pid:' + postData.pid + ':replies'),
+		];
+		if (parseInt(postData.toPid, 10)) {
+			promises.push(db.sortedSetRemove('pid:' + postData.toPid + ':replies', postData.pid));
+			promises.push(db.decrObjectField('post:' + postData.toPid, 'replies'));
 		}
-		await Promise.all([
-			db.sortedSetRemove('pid:' + postData.toPid + ':replies', postData.pid),
-			db.decrObjectField('post:' + postData.toPid, 'replies'),
-		]);
+		await Promise.all(promises);
 	}
 
 	async function deletePostFromGroups(postData) {

src/upgrades/1.15.4/clear_purged_replies.js

@@ -0,0 +1,33 @@
+'use strict';
+
+const _ = require('lodash');
+const db = require('../../database');
+
+const batch = require('../../batch');
+
+module.exports = {
+	name: 'Clear purged replies and toPid',
+	timestamp: Date.UTC(2020, 10, 26),
+	method: async function () {
+		const progress = this.progress;
+
+		await batch.processSortedSet('posts:pid', async function (pids) {
+			progress.incr(pids.length);
+			let postData = await db.getObjects(pids.map(pid => 'post:' + pid));
+			postData = postData.filter(p => p && parseInt(p.toPid, 10));
+			if (!postData.length) {
+				return;
+			}
+			const toPids = postData.map(p => p.toPid);
+			const exists = await db.exists(toPids.map(pid => 'post:' + pid));
+			const pidsToDelete = postData.filter((p, index) => !exists[index]).map(p => p.pid);
+			await db.deleteObjectFields(pidsToDelete.map(pid => 'post:' + pid), ['toPid']);
+
+			const repliesToDelete = _.uniq(toPids.filter((pid, index) => !exists[index]));
+			await db.deleteAll(repliesToDelete.map(pid => 'pid:' + pid + ':replies'));
+		}, {
+			progress: progress,
+			batchSize: 500,
+		});
+	},
+};

test/database/hash.js

@@ -415,6 +415,16 @@ describe('Hash methods', function () {
 			});
 		});
 
+		it('should delete multiple fields of multiple objects', async function () {
+			await db.setObject('deleteFields1', { foo: 'foo1', baz: '2' });
+			await db.setObject('deleteFields2', { foo: 'foo2', baz: '3' });
+			await db.deleteObjectFields(['deleteFields1', 'deleteFields2'], ['baz']);
+			const obj1 = await db.getObject('deleteFields1');
+			const obj2 = await db.getObject('deleteFields2');
+			assert.deepStrictEqual(obj1, { foo: 'foo1' });
+			assert.deepStrictEqual(obj2, { foo: 'foo2' });
+		});
+
 		it('should not error if fields is empty array', async () => {
 			await db.deleteObjectFields('someKey', []);
 		});

test/topics.js

@@ -190,6 +190,22 @@ describe('Topic\'s', function () {
 				done();
 			});
 		});
+
+		it('should delete nested relies properly', async function () {
+			const result = await topics.post({ uid: fooUid, title: 'nested test', content: 'main post', cid: topic.categoryId });
+			const reply1 = await topics.reply({ uid: fooUid, content: 'reply post 1', tid: result.topicData.tid });
+			const reply2 = await topics.reply({ uid: fooUid, content: 'reply post 2', tid: result.topicData.tid, toPid: reply1.pid });
+			let replies = await socketPosts.getReplies({ uid: fooUid }, reply1.pid);
+			assert.strictEqual(replies.length, 1);
+			assert.strictEqual(replies[0].content, 'reply post 2');
+			let toPid = await posts.getPostField(reply2.pid, 'toPid');
+			assert.strictEqual(parseInt(toPid, 10), parseInt(reply1.pid, 10));
+			await posts.purge(reply1.pid, fooUid);
+			replies = await socketPosts.getReplies({ uid: fooUid }, reply1.pid);
+			assert.strictEqual(replies.length, 0);
+			toPid = await posts.getPostField(reply2.pid, 'toPid');
+			assert.strictEqual(toPid, null);
+		});
 	});
 
 	describe('Get methods', function () {