Module:Data/sandbox explained

local mt =

function mt.__index(t, k) return function(frame) local success, data = pcall(mw.loadData, k) if not success then success, data = pcall(mw.loadJsonData, k) if not success then error("'" .. k .. "' is not a valid data page") end end for i, v in ipairs(frame.args) do local ty = type(data) if ty ~= 'table' then local args = for j = 1, i - 1 do args[j] = frame.args[j] end if frame.args.softfail then return '

Error: Tried to read index "' .. mw.text.nowiki(v) .. '" of mw.loadData("' .. mw.text.nowiki(k) .. '").' .. mw.text.nowiki(table.concat(args, '.')) .. ', which is a ' .. ty .. '' else error('Tried to read index "' .. v .. '" of mw.loadData("' .. k .. '").' .. table.concat(args, '.') .. ', which is a ' .. ty) end end local nextdata = data[v] if nextdata

nil and tonumber(v) then data = data[tonumber(v)] else data = nextdata end end return data endend

return setmetatable(mt)