How to get multiple values via SORT BY NOSORT in lua?

[Duraz]

We have several SETs containing KEYS in the form of:

    x:123456789:t

    

    (t values are stringified JSON texts like {"k":"v", "k":"v", "k":"v"…})

We intersect 3+ of these SETs with

    local c1 = redis.call('SINTERSTORE', sTemp, unpack(KEYS))

    

Now we'd like to get the t text-values associated with the KEYS in the resulting SET setTemp with

 

 SORT sTemp BY NOSORT GET *:t

    

which gives us something like this via redis-cli

{"k":"v", "k":"v", "k":"v"…}

{"k":"v", "k":"v", "k":"v"…}

{"k":"v", "k":"v", "k":"v"…}…

    

Now how does one represent SORT sTemp BY NOSORT GET *:t in lua?

These random tries give the obvious errors:

c1 = redis.call('SINTERSTORE', sTemp, unpack(KEYS))

1. local c2 = redis.call('SORT sTemp by nosort get *:t') => sTemp is not a local variable

2. local sTemp

    local c2 = redis.call('SORT sTemp by nosort get *:t') => [Error: Unknown Redis command called from Lua script]

3. local c2 = redis.call('SORT', sTemp, 'by nosort get *:t') => [Error: Lua redis() command arguments must be strings or integers]

I don't know if looping through sTemp set with ID KEYS and doing a GET on each would be less performant than SORT in one operation, but I'd like to know if it can be done in lua.

Thanks.

[Josiah Carlson]

You need to separate all of your arguments into pieces in order to get the Redis call to work.

redis.call('SORT', sTemp, 'by', 'nosort', 'get', '*:t')

 - Josiah

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