CODEWITHSUNDEEP
pythonmongodb
billyJoe
billyJoe

Reputation: 2064

Filter timestamp with mongoDb

suppose this Json export from my mongoDb

{
   "_id":{
      "$oid":"51ca002d9e67460354bb0089"
   },
   "node":{
      "id":"1",
      "components":[
         {
            "sensors":[
               {
                  "name":"backup-job-name",
                  "value":"Job_2"
               },
               {
                  "name":"backup-job-id",
                  "value":"187"
               },
               {
                  "name":"backup-start-date",
                  "value":"1372138227"
               },
               {
                  "name":"backup-stop-date",
                  "value":"1372138235"
               },
               {
                  "name":"backup-nb-errors",
                  "value":"0"
               },
               {
                  "name":"backup-nb-warnings",
                  "value":"0"
               },
               {
                  "name":"backup-source-files",
                  "value":"402"
               },
               {
                  "name":"backup-source-bytes",
                  "value":"168571449"
               },
               {
                  "name":"backup-status",
                  "value":null
               }
            ],
            "type":"backup",
            "serial":"1-backup-backup-job-name-Job_2"
         },
         {
            "sensors":[
               {
                  "name":"backup-job-name",
                  "value":"Test_bckp"
               },
               {
                  "name":"backup-job-id",
                  "value":""
               },
               {
                  "name":"backup-start-date",
                  "value":"0"
               },
               {
                  "name":"backup-stop-date",
                  "value":"0"
               },
               {
                  "name":"backup-nb-errors",
                  "value":"0"
               },
               {
                  "name":"backup-nb-warnings",
                  "value":"0"
               },
               {
                  "name":"backup-source-files",
                  "value":"0"
               },
               {
                  "name":"backup-source-bytes",
                  "value":"0"
               },
               {
                  "name":"backup-status",
                  "value":null
               }
            ],
            "type":"backup",
            "serial":"1-backup-backup-job-name-Test_bckp"
         }
      ]
   },
   "timestamp":1372192813
}

I work with python and i'd like to get documents where "backup-start-date" (stored as timestamp) il greater than a given value.

I've tried with 

collection.find({
        'node.components.type': 'backup', 
        'node.components.sensors': {'name': 'backup-start-date', 'value': {'$gte': ts_to_compare_with}}}):

but any documents in the result. Is my query wrong ?

Upvotes: 1

Views: 3138

Answers (1)

Ross
Ross

Reputation: 18111

There are two things - you are wanting to match an sensor document in the components array and $gte only works on integers and dates.

If you convert the data to be ints then you can use $gte and query like so:

db.test.find({
  'node.components.type': 'backup', 
  'node.components.sensors': { 
      $elemMatch: {'name': 'backup-start-date', 
                   'value': {'$gte': 168571445}}}})

Upvotes: 2

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