Mongodb query inside array with single ObjectID - mongodb

Question

Here is the json data i am trying to process. I am trying to get messages between two dates. The data is already imported to mongodb.
{
"items": [
{
"date": "2017-04-06T09:46:20.387420+00:00",
"from": {
"id": 4624534,
"links": {
"self": "https://api.hipchat.com/v2/user/4624534"
},
"mention_name": "holy",
"name": "holy god",
"version": "Y1ML0DRJ"
},
"id": "38f90558-2a23-458b-b87b-88dbdf997f7a",
"mentions": [],
"message": "ping",
"type": "message"
},
{
"date": "2017-04-08T04:30:44.240163+00:00",
"from": {
"id": 4624534,
"links": {
"self": "https://api.hipchat.com/v2/user/4624534"
},
"mention_name": "holy",
"name": "holy god",
"version": "Y1ML0DRJ"
},
"id": "822b81e0-8077-41d7-bc50-fc9e4eba7d9e",
"mentions": [],
"message": "https://twitter.com/",
"type": "message"
},
{
"attach_to": "822b81e0-8077-41d7-bc50-fc9e4eba7d9e",
"card": "{\"style\": \"link\", \"description\": \"From breaking news and entertainment to sports and politics, get the full story with all the live commentary.\", \"format\": \"medium\", \"url\": \"https://twitter.com/i/hello\", \"title\": \"Twitter. It's what's happening.\", \"id\": \"https://twitter.com/i/hello\", \"validation\": {\"safehtmls\": [\"activity.html\"], \"safeurls\": [\"url\", \"images.image\", \"images.image-small\", \"images.image-big\", \"icon.url\", \"icon.url#2x\", \"icon\", \"thumbnail.url#2x\", \"thumbnail.url\"]}, \"type\": \"link\", \"thumbnail\": {\"url\": \"https://pbs.twimg.com/ext_tw_video_thumb/850335753108324353/pu/img/T8cV-7bGbbguiRGV.jpg\", \"width\": 599, \"type\": \"image/jpeg\", \"height\": 337}, \"icon\": {\"url\": \"https://abs.twimg.com/a/1491551685/img/t1/favicon.svg\", \"type\": \"image\"}}",
"color": "gray",
"date": "2017-04-08T04:30:44.825185+00:00",
"from": "Link",
"id": "7ccaf2b9-09bb-45ac-a025-c93f1f7df745",
"mentions": [],
"message": "\n\n\n<p><b>Twitter. It's what's happening.</b></p>\n\n\n<p>From breaking news and entertainment to sports and politics, get the full story with all the live commentary.</p>\n\n",
"message_format": "html",
"notification_sender": {
"client_id": "888aec94-afee-45d8-89f7-ae077fcc4a7c",
"id": "hipchat-clinky",
"type": "addon"
},
"type": "notification"
},
{
"date": "2017-04-08T09:39:00.468858+00:00",
"from": {
"id": 4624534,
"links": {
"self": "https://api.hipchat.com/v2/user/4624534"
},
"mention_name": "abcholy",
"name": "holy god",
"version": "Y1ML0DRJ"
},
"id": "8a0de0e0-c312-490e-afcc-b0b16404cd67",
"mentions": [],
"message": "second message",
"type": "message"
},
{
"date": "2017-04-11T15:32:39.367744+00:00",
"from": {
"id": 4624534,
"links": {
"self": "https://api.hipchat.com/v2/user/4624534"
},
"mention_name": "abcholy",
"name": "holy god",
"version": "Y1ML0DRJ"
},
"id": "4c1a090c-cb71-4548-8f96-a03ec2f3fb3b",
"mentions": [],
"message": "https://gist.github.com/abcholy/6d86352e73eab21cdd4fe78b37bd5aa0",
"type": "message"
},
{
"date": "2017-04-11T15:33:42.730696+00:00",
"from": {
"id": 4624534,
"links": {
"self": "https://api.hipchat.com/v2/user/4624534"
},
"mention_name": "abcholy",
"name": "holy god",
"version": "Y1ML0DRJ"
},
"id": "a42b5267-937b-4de5-8c51-de4625742a4a",
"mentions": [],
"message": "hello",
"type": "message"
}
],
"links": {
"self": "https://api.hipchat.com/v2/room/3452990/history"
},
"maxResults": 100,
"startIndex": 0
}
Now, I entered this mongo query:
db.data.find( {"_id" : ObjectId("58ee59f7f35120aaba26cff0")},{ items: { $elemMatch: { "date": {$gte:"2017-04-08T04:30:44.240163+00:00"} } } } )
But it returns just a single item which is the first one. If I try $lte, it also returns single item but I want all the items which fall under the specification of date. How to achieve that?

Answer 1

Your date field is a string, it has no concept of what's greater than that string. You'll need to convert it to a ISODate or another date format for you to use the $gte or $lte operation.