Question

mongoexport -h“hostname”-u“username”-p password -d“dbname”-c“collection”-q'{“REQUEST_TIMESTAMP”：“{$ gt：new Date（ISODate（）。getTime（） - 1000 * 60 * 60）}“}' - o output.json

我想使用mongoshell获取最近1小时的记录，上述日期功能在mongodb中完美运行，但在mongoshell中不能。

请你解释一下如何使用epoch格式最后一小时，它应该是动态的不是编码的

Answer 1

说我们有以下数据：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public static DataTable inputTable = new DataTable();
        public static DataTable outputTable = new DataTable();
        public static List<List<KeyValuePair<string,string>>> parseRows = new List<List<KeyValuePair<string,string>>>();
        public Form1()
        {
            InitializeComponent();

            inputTable.Columns.Add("Index", typeof(string));
            inputTable.Columns.Add("Title", typeof(string));

            inputTable.Rows.Add(new string[] { "01", "EQUITY" });
            inputTable.Rows.Add(new string[] { "01-001", "MR. J" });
            inputTable.Rows.Add(new string[] { "01-002", "MR. K" });
            inputTable.Rows.Add(new string[] { "01-003", "MR. L" });
            inputTable.Rows.Add(new string[] { "01-004", "MR. M" });
            inputTable.Rows.Add(new string[] { "02", "TRADE CREDITORS" });
            inputTable.Rows.Add(new string[] { "02-001", "TRADE CREDITORS RAW MATERIALS" });
            inputTable.Rows.Add(new string[] { "02-001-0001", "TRADE CREDITORS ITEM X" });
            inputTable.Rows.Add(new string[] { "02-001-0001-001", "MR. A" });
            inputTable.Rows.Add(new string[] { "02-001-0001-002", "MR. B" });
            inputTable.Rows.Add(new string[] { "02-001-0001-003", "MR. C" });
            inputTable.Rows.Add(new string[] { "02-001-0001-004", "MR. D" });
            inputTable.Rows.Add(new string[] { "02-002", "TRADE CREDITORS PACKING MATERIALS" });
            inputTable.Rows.Add(new string[] { "02-002-0001", "MR. X" });
            inputTable.Rows.Add(new string[] { "02-002-0002", "MR. Y" });
            inputTable.Rows.Add(new string[] { "02-002-0003", "MR. Z" });

            RecursiveParseTable("", new List<KeyValuePair<string,string>>());

            //get maximum number of columns for table
            int maxColumns = parseRows.Select(x => x.Count()).Max();

            //create output table
            for (int i = 0; i < maxColumns; i++)
            {
                outputTable.Columns.Add("Index " + (i + 1).ToString(), typeof(string));
                outputTable.Columns.Add("Title " + (i + 1).ToString(), typeof(string));
            }
            foreach(List<KeyValuePair<string, string>> row in parseRows)
            {
                DataRow newRow = outputTable.Rows.Add();
                int colIndex = 0;
                foreach (KeyValuePair<string, string> col in row)
                {
                    newRow[colIndex] = col.Key;
                    newRow[colIndex + 1] = col.Value;
                    colIndex += 2;
                }

            }
            dataGridView1.DataSource = outputTable;
        }
        public static void RecursiveParseTable(string index, List<KeyValuePair<string, string>> titles)
        {
            List<DataRow> children = null;
            if (index.Length == 0)
            {
                children = inputTable.AsEnumerable().Where(x => !x.Field<string>("Index").Contains("-")).ToList();
            }
            else
            {
                int startParseIndex = index.Length + 1;  //only get child indexes with no dash so you don't get grandchildren
                children = inputTable.AsEnumerable().Where(x => 
                    (x.Field<string>("Index").StartsWith(index + "-")) && 
                    (!x.Field<string>("Index").Substring(startParseIndex).Contains("-"))
                    ).ToList();
            }
            children = children.OrderBy(x => x.Field<string>("Index")).ToList();

            if (children.Count == 0)
            {

                parseRows.Add(titles);
            }
            else
            {
                foreach (DataRow child in children)
                {
                    List<KeyValuePair<string, string>> childTitles = new List<KeyValuePair<string, string>>();
                    childTitles.AddRange(titles);

                    string childIndex = child.Field<string>("Index");
                    string childTitle = child.Field<string>("Title");

                    childTitles.Add(new KeyValuePair<string, string>(childIndex, childTitle));
                    RecursiveParseTable(childIndex, childTitles);
                }

            }

        }

    }


}

我们可以使用与您类似的查询导出它，但是从bash添加日期

> db.test.find()
{ "_id" : ObjectId("59f45e259ea74673bf2e80fe"), "d" : ISODate("2016-10-28T10:00:00Z") }
{ "_id" : ObjectId("59f45e289ea74673bf2e80ff"), "d" : ISODate("2016-11-28T10:00:00Z") }
{ "_id" : ObjectId("59f45e2d9ea74673bf2e8100"), "d" : ISODate("2016-12-28T10:00:00Z") }
{ "_id" : ObjectId("59f45e319ea74673bf2e8101"), "d" : ISODate("2017-12-28T10:00:00Z") }
{ "_id" : ObjectId("59f45e379ea74673bf2e8102"), "d" : ISODate("2018-12-28T10:00:00Z") }
{ "_id" : ObjectId("59f45e3a9ea74673bf2e8103"), "d" : ISODate("2018-12-28T11:00:00Z") }
{ "_id" : ObjectId("59f45e3d9ea74673bf2e8104"), "d" : ISODate("2018-12-28T12:00:00Z") }

然后，如果我们看一下输出：

$ date
28 Oct 2017 12:01:21

$ d=$(date -d '1 hour ago' +%s%N | cut -b1-13)

$ ./mongoexport -d "test" -c "test" -q '{"d": {$gt: new Date('$d') }}' -o output.json

具有日期函数的{mongo export -q问题

1 个答案: