javascript - map 函数保存后不执行

Question

我正在使用 chouchdb 1.3.0 创建以下 map 函数。如果我将它作为临时 View 运行，它工作正常，但一旦我保存它，它就无法编译。

function(doc) {
    var datestamp = convert_date(doc["report"]["period"]);
    var report_suite = doc["report"]["reportSuite"]["id"];
    var segment = doc["report"]["segment_id"];
    emit([report_suite, segment, datestamp], [doc["report"]["elements"][0]["id"]]);
  }

function convert_date(date){
    var months = {"Jan": "01", "Feb": "02", "Mar": "03", "Apr": "04", "May": "05",    "Jun": "06", "Jul": "07", "Aug": "08", "Sep": "09", "Oct": "10", "Nov": "11", "Dec": "12" };
    var year = date.substring(13, 17);
    var month = months[date.substring(8,11)];
    var day = date.substring(5,7).replace(" ", "0");
    var datestamp = year + month + day;
    return datestamp;
}

错误信息是:“表达式不计算为函数”

我用谷歌搜索并尝试失败:

• 在函数两边加上括号
• 内联 convert_date 函数

Answer 1

如果将 convert_date 函数放在 map 函数中会怎样？

  function(doc) {
    var convert_date = function(date) {
      var months = {"Jan": "01", "Feb": "02", "Mar": "03", "Apr": "04", "May": "05",    "Jun": "06", "Jul": "07", "Aug": "08", "Sep": "09", "Oct": "10", "Nov": "11", "Dec": "12" };
      var year = date.substring(13, 17);
      var month = months[date.substring(8,11)];
      var day = date.substring(5,7).replace(" ", "0");
      var datestamp = year + month + day;
      return datestamp;
    }
    var datestamp = convert_date(doc["report"]["period"]);
    var report_suite = doc["report"]["reportSuite"]["id"];
    var segment = doc["report"]["segment_id"];
    emit([report_suite, segment, datestamp], [doc["report"]["elements"][0]["id"]]);
  }