无法从“for”循环内部读取“第二个”json 文件（Lua+Latex）

Question

我正在循环遍历 json 文件并以以下格式显示内容：

Zone 1 
   Projection(Main.tex)
   Grat Table(gratsection.tex)
Zone 2
   Projection (Main.tex)
   Grat table (gratsection.tex)

主文本

\documentclass{article}
%%%%%%%%%%%%% Font Packages %%%%%%%%%%%%%
\usepackage[document]{ragged2e}
\usepackage[nohead,paperheight=11.0in,paperwidth=8.5in,left=0.5in,right=0.5in,top=0.5in,bottom=1.0in]{geometry}

%%%% Font %%%%
\usepackage{fontspec}

%%%%% dynamic table package %%%%%
\usepackage{datatool}
\DTLsetseparator{,}% Set the separator between the columns.
\usepackage{longtable}
\usepackage{tabularx}
\usepackage{amsmath}

\usepackage{hhline}
\usepackage{multicol}
\usepackage{multirow}
\usepackage{booktabs}
\usepackage{makecell}
\usepackage{color, colortbl}
\usepackage[table]{xcolor}


\usepackage{xparse}
\usepackage{etoolbox}
\usepackage{array}
\usepackage{luacode}
\usepackage{xcolor}
\usepackage{graphicx}
%%%%%%% Section %%%%%%

\usepackage[compact]{titlesec}
\titleformat{\section}
{\normalfont\Large\bfseries\filcenter}{\thesection}{1em}{}
\renewcommand{\familydefault}{\sfdefault}

\renewcommand{\arraystretch}{1.5}
\setlength{\arrayrulewidth}{1pt}
\titlespacing*{\section}{0pt}{*0}{*0}
\font\myfont=cmr12 at 16pt


\begin{document}
\newcolumntype{L}{|>{\raggedright\arraybackslash\bfseries}X|X}
\catcode10=9\

\begin{luacode*}
local json = require("json")
local file = io.open("data.json")
tab = json.parse(file:read("*all"))
file:close()

for ii,jj in ipairs(tab["Zones"]) do  
 
   %% PROJECTION
            tex.sprint(
                [[\begin{table}[ht!]
                \centering
                \begin{tabularx}{\textwidth}{@{} LL @{}}
                \hline]])
                for w, v in ipairs(jj.Projection.Header) do
                    tex.sprint(
                    [[\textbf]],
                    v.key, [[& ]],
                    v.val, [[\\]],
                    [[\hhline{--}]])
                end  
            tex.sprint(
                [[
                \end{tabularx}
                \end{table}]])
  %%GRAT SECTION  
   tex.sprint([[\input{gratsection}]])
   
end
\end{luacode*}
\end{document}

如果在 'for' 循环之外调用 '\input{gratsection.tex}'，我的 MWE 会显示两次投影信息（Zone 数组中的 2 个对象）和一次 Grat 表：

但我无法显示每个投影区域下的部分文件中的 Grat 表。在“FOR”循环中，Grat 表（来自 gratsection.tex）不会显示。代码陷入无限循环，无法编译，但看不到任何错误。有什么方法可以实现这一点吗？

gratsection.tex

\section*{ SECTION 2(GRAT)}
\newcolumntype{L}{|>{\raggedright\arraybackslash\bfseries}X|X}
\catcode10=9\


\definecolor{lightgray}{gray}{0.9}
\let\oldtabularx\tabularx
\renewcommand*{\tabularx}{\rowcolors{1}{}{lightgray}\oldtabularx}


\begin{luacode*}
local json = require("json")
local file = io.open("graticule_table.json")
tab = json.parse(file:read("*all"))
file:close()

tex.sprint(
    [[\begin{table}[ht!]
    \centering
    \begin{tabularx}{\textwidth}{@{} LL @{}}
    \hline]])
    for k, v in ipairs(tab["GratTable"]) do
        tex.sprint(
        [[\textbf]],
        v.LATDEG, [[& ]],
        v.LATMIN, [[\\]],
        [[\hhline{--}]])
    end  
tex.sprint(
    [[
    \end{tabularx}
    \end{table}]])

\end{luacode*}

数据.json

{
    "Zones":[
        {
          "name":"Zone 1",
          "Projection": {
            "Zone": "29",
            "Header": [
              {
                "key": "MAP NAME",
                "val": "XX"
              },
              {
                "key": "PROJECTION",
                "val": "YY"
              }
            ]
          },
          "Grat": {
            "Header": [
              {
                "key": "SHEET NAME",
                "val": "AA"
              },
              {
                "key": "PROJECTION",
                "val": "BB"
              }
            ]
          }
        },
        {
          "name":"Zone 2",
          "Projection": {
            "Zone": "30",
            "Header": [
              {
                "key": "MAP NAME",
                "val": "AA"
              },
              {
                "key": "PROJECTION",
                "val": "BB"
              }
            ]
                     },
          "Grat": {
            "Header": [
              {
                "key": "SHEET NAME",
                "val": "XX"
              },
              {
                "key": "PROJECTION",
                "val": "YY"
              }
            ]
          }
        }
   ]
}

graticule_table.json（这是一个很大的文件，需要将其单独保存）

{
     "GratTable": [
            {
                "LATDEG": "1",
                "LATMIN": "30"
            },
            {
                "LATDEG": "2",
                "LATMIN": "45"
               
            }
            ]
}

解析 JSON 的 json.lua 文件来自http://regex.info/blog/lua/json