Need some help implementing Leaderboard in FB Instant Game

sam_m

I've having trouble getting leaderboard to work in FB Instant.
This is the code I'm using upon finishing a level to save the score. But I'm getting the error -

"LuaPlugins_/FBInstant.lua:384: attempt to call method 'gsub' (a nil value)
stack traceback:
_LuaPlugins_/FBInstant.lua:384: in function 'escapeString'
_LuaPlugins_/FBInstant.lua:447: in function 'setScoreAsync'
GameManager.lua:502: in function '?'
_LuaPlugins_/FBInstant.lua:555: in function <_LuaPlugins_/FBInstant.lua:553>"

The code I'm using is -

mydata.FBInstant.startGameAsync(function()   if mydata.FBInstantAPI == true then   mydata.FBInstant.getLeaderboardAsync("my_leaderboard", function(result,error)   result:setScoreAsync(430,{level=1},function(self,result,entry) if result then print("score ok",entry) for key,val in pairs(entry.entry) do print(key,val)   local text = TextField.new(mydata.font1, "0") stage:addChild(text) text:setPosition(20, 20) text:setText(key.." "..tostring(val)) end   end end)   end)   end   end)

Any and all help deeply appreciated. Thanks.

hgy29

IIRC the second parameter to setScoreAsync must be a string (json), not directly a table

sam_m

@hgy29 Thank you so much for your reply. With your help, the code now works.

Now for what I'm sure is a very stupid question. How do I put variables in the string?
As in this works - '{race: "elf", level: 3}'

I'd also like to make this work - {level: mydata.levelID}'

hgy29

You can use several ways:

-- Using concatenation: local payload=[[{race: "]]..playerRace..[[", level: ]]..playerLevel..[[}]] -- Using string.format: local payload=([[{race: "%s", level: %d}]]):format(playerRace,playerLevel) -- Using json encode require "json" local playerData={ race=playerRace, level=playerLevel} local payload=json.encode(playerData)

sam_m

@hgy29 It works. Thank you so much.