Re: Error handling strategy for Redis multi-bulk replies, in context of Lua bindings

[Alexander Gladysh <agladysh@...>]

On Thu, Mar 24, 2011 at 05:52, Robert G. Jakabosky
<bobby@sharedrealm.com> wrote:
> On Wednesday 23, Alexander Gladysh wrote:

>> MULTI
>> SET a 3
>> LPOP a
>> INCR a
>> EXEC

>> Returns:

>> 1. OK
>> 2. (error) ERR Operation against a key holding the wrong kind of value
>> 3. (integer) 4

>> How should this result be returned to Lua?

>> {
>>   "OK",
>>   -- how to express error message here?
>>   4
>> }

>> P.S. Note that "OK" is a status reply (REDIS_REPLY_STATUS), not a
>> string (REDIS_REPLY_STRING). I'd like to separate those two as well,
>> but this is of much less priority (I think).

> I would wrap status/error replies in a status userdata object with a is_error
> field/method.  For string/number reply values convert them to basic lua
> string/numbers.

Interesting idea. I'm trying to imagine how the user's code would look
like. Wouldn't it be too cumbersome to work with?

Alexander.