fix(job): validate job existence when adding log

lib/commands/addLog-2.lua

@@ -0,0 +1,30 @@
+--[[
+  Add job log
+
+  Input:
+    KEYS[1] job id key
+    KEYS[2] job logs key
+
+    ARGV[1] id
+    ARGV[2] log
+    ARGV[3] keepLogs
+
+  Output:
+    -1 - Missing job.
+]]
+local rcall = redis.call
+
+if rcall("EXISTS", KEYS[1]) == 1 then -- // Make sure job exists
+  local logCount = rcall("RPUSH", KEYS[2], ARGV[2])
+
+  if ARGV[3] ~= '' then
+    local keepLogs = tonumber(ARGV[3])
+    rcall("LTRIM", KEYS[2], -keepLogs, -1)
+
+    return math.min(keepLogs, logCount)
+  end
+
+  return logCount
+else
+  return -1
+end

lib/job.js

@@ -394,8 +394,7 @@ Job.prototype.retry = function() {
  *
  */
 Job.prototype.log = function(logRow) {
-  const logsKey = this.toKey(this.id) + ':logs';
-  return this.queue.client.rpush(logsKey, logRow);
+  return scripts.addLog(this.queue, this.id, logRow);
 };
 
 Job.prototype.isCompleted = function() {

lib/scripts.js

@@ -67,6 +67,22 @@ const scripts = {
     return queue.client.pause(keys.concat([pause ? 'paused' : 'resumed']));
   },
 
+  async addLog(queue, jobId, logRow, keepLogs) {
+    const client = await queue.client;
+
+    const keys = [queue.toKey(jobId), queue.toKey(jobId) + ':logs'];
+
+    const result = await client.addLog(
+      keys.concat([jobId, logRow, keepLogs ? keepLogs : ''])
+    );
+
+    if (result < 0) {
+      throw scripts.finishedErrors(result, jobId, 'addLog');
+    }
+
+    return result;
+  },
+
   moveToActive(queue, jobId) {
     const queueKeys = queue.keys;
     const keys = [queueKeys.wait, queueKeys.active, queueKeys.priority];

test/test_job.js

@@ -593,6 +593,16 @@ describe('Job', () => {
           .then(logs => expect(logs).to.be.eql({ logs: [], count: 0 }))
       );
     });
+
+    describe('when job was removed', () => {
+      it('throws an error', async () => {
+        const job = await Job.create(queue, { foo: 'bar' });
+        await job.remove();
+        await job.log('some log text 1').catch(err => {
+          expect(err.message).to.be.equal('Missing key for job 1 addLog');
+        });
+      });
+    });
   });
 
   describe('.moveToCompleted', () => {