FCALL_RO

Invoke a read-only function

1 min read

Note

The function must be declared with the no-writes flag for it to be used with callRo.

Arguments#

functionstringrequired#

The function name.

keysstring[]#

The keys that the function accesses.

Warning

The function can only read from the keys that are provided in the keys argument.

argsstring[]#

The arguments for the function.

Response#

FCALL FUNCTION DELETE

const code = `#!lua name=ro_lib  local function get_value(keys, args)  return redis.call('GET', keys[1])endredis.register_function({  function_name='get_value',   callback=get_value,   flags={ 'no-writes' }})`;await redis.functions.load({ code, replace: true });// Call the read-only function// Note: We can modify the keys usage here, but since it represents a read-only operation// and we marked it with 'no-writes', it is safe to use callRo.const value = await redis.functions.callRo("get_value", ["mykey"])