Question for new lua support

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Hi, I upgrade my suricata to 8.0-beta1 release version

# suricata --build-info
This is Suricata version 8.0.0-beta1 RELEASE
Features: PCAP_SET_BUFF AF_PACKET HAVE_PACKET_FANOUT LIBCAP_NG LIBNET1.1 HAVE_HTP_URI_NORMALIZE_HOOK PCRE_JIT HAVE_NSS HTTP2_DECOMPRESSION HAVE_LUA HAVE_JA3 HAVE_JA4 HAVE_LIBJANSSON TLS TLS_C11 MAGIC RUST POPCNT64
SIMD support: SSE_4_2 SSE_4_1 SSE_3 SSE_2
Atomic intrinsics: 1 2 4 8 16 byte(s)
64-bits, Little-endian architecture
GCC version 13.3.0, C version 201112
L1 cache line size (CLS)=64
thread local storage method: _Thread_local
compiled with LibHTP v2.0.0

my detect rule by lua script cannot work now. error message:

E: detect-lua: data type http.request_body no longer supported, use rule hooks
E: detect: error parsing signature "alert http any any -> any any (msg:"suo5 tunnel"; flow:established; flowbits:isset,suo5_req; lua:./lua/suo5.lua; classtype:web-application-attack; sid:0101390; gid:1; priority:1; metadata:env production; rev:1;)" from file /var/lib/suricata/rules/suricata.rules at line 128

script content:


function init(args)
    local needs = {}
    needs["http.request_body"] = tostring(true)
    return needs
end

function match(args)
    reqbody = tostring(args["http.request_body"])
    SCLogNotice("reqbody: "..reqbody)
    return 0
end

And I read documentation of 8.0.0-beta1 version , change script to:

local http = require("suricata.http")

function init(args)
    local needs = {}
    return needs
end

function match(args)
    local tx = http.get_tx()
    http_request_body = tx:request_body()
    SCLogNotice("reqbody: "..http_request_body)
    return 0
end

it still cannot work with error message:

W: detect-lua: Lua script failed to run successfully: /var/lib/suricata/rules/./lua/suo5.lua:10: attempt to index a nil value (local 'tx')