2 篇博文 含有标签「transation」

// 查询并增加一次计数
async incr (id) {
    const key = `${this.namespace}:${id}`
    const now = getMicrotime()
    const start = now - this.duration * 1000

    const operations = [
      ['zremrangebyscore', key, 0, start],
      ['zcard', key],
      ['zadd', key, now, now],
      ['pexpire', key, this.duration]
    ]

    const res = await this.redis.multi(operations).exec()
    const count = toNumber(res[1][1])
    return count
}

Cannot read property '1' of undefined

buyItem: function(req, res) {
  try {
    // Start the transaction
    User.query("BEGIN", function(err) {
      if (err) {throw new Error(err);}
      // Find the user
      User.findOne(req.param("userId").exec(function(err, user) {
        if (err) {throw new Error(err);}
        // Update the user balance
        user.balance = user.balance - req.param("itemCost");
        // Save the user
        user.save(function(err) {
          if (err) {throw new Error(err);}
          // Commit the transaction
          User.query("COMMIT", function(err) {
            if (err) {throw new Error(err);}
            // Display the updated user
            res.json(user);
          });
        });
      });
    });
  }
  // If there are any problems, roll back the transaction
  catch(e) {
    User.query("ROLLBACK", function(err) {
      // The rollback failed--Catastrophic error!
      if (err) {return res.serverError(err);}
      // Return the error that resulted in the rollback
      return res.serverError(e);
    });
  }
}