A Meteor client Template returns mongodb cursor. The collection has 3 documents which contain date field. I expected the find to return 3 documents, but it only gave one the date of which is Mon Aug 08 2016 00:00:00 GMT+1000 (AEST).
Why is that and how can I get the 3 documents? Thanks
"date" : ISODate("2016-08-08T14:00:00Z"),
"date" : ISODate("2016-08-08T14:00:00Z"),
"date" : ISODate("2016-08-07T14:00:00Z"),
console.log(start); //=> Sun Aug 07 2016 00:00:00 GMT+1000 (AEST)
console.log(end); //=> Mon Aug 08 2016 00:00:00 GMT+1000 (AEST)
console.log(myCol.find({date: {$gte: start, $lte: end}}).fetch()); // expected 3 not just 1
the code below shows how the date was before inserting in the collection.
const date = cheerioObj(this).next().html().trim();
const dArr = date.split('/');
const dObj = new Date(parseInt(dArr[2]), parseInt(dArr[1]) - 1, parseInt(dArr[0]));
EDIT: Sorry, it's late.
It may be to do with your .fetch() method. Try iterating the cursor instead:
var myArray = db.users.find({...}).toArray();
Then access each in a for loop.
I've two collections one is random and other one is 'msg'
In message I've a document like
{ "message": "sssss", postedAt: Fri Jul 17 2015 09:03:43 GMT+0530 (IST) }
For random collection, there is a script which generates random number every minute
like
{ "randomStr": "sss", postedAt: Fri Jul 17 2015 09:03:43 GMT+0530 (IST) }
{ "randomStr": "xxx", postedAt: Fri Jul 17 2015 09:04:43 GMT+0530 (IST) }
{ "randomStr": "yyy", postedAt: Fri Jul 17 2015 09:05:43 GMT+0530 (IST) }
Notice the change in timings, for every mintute there is a new record.
Now, my issue is
when I query for message collection, I'll get one record.
Lets's say this
{ "message": "sssss", postedAt: Fri Jul 17 2015 09:03:13 GMT+0530 (IST) }
now I want to get the record from random collection which posts at exact minute
this message is posted at 09:03, I want to get the record from random collection which postedat exactly same time 09:03.
How to do that? Any help appreciated. Thx.
Note: I'm doing this in meteor
Edit
Added image for first comment
So the point here is 'actually use a range' and also be aware of the Date value you get in return. So as a basic example in principle.
The time right now as I execute this is:
var date = new Date()
ISODate("2015-07-17T04:02:04.471Z")
So if you presume then that your actual timestamp in the document is "not exactly to the minute" (like above) nor is it likely the "random record" is so then the first thing to do is "round" it to the minute:
date = new Date(date.valueOf() - date.valueOf() % ( 1000 * 60 ))
ISODate("2015-07-17T04:02:00Z")
And of course the "end date" is just one minute after that:
var endDate = new Date(date.valueOf() + ( 1000 * 60 ))
ISODate("2015-07-17T04:03:00Z")
Then when you query "rqndom" you just get the "range", with $gte and $lt operators:
db.random.find({ "postedAt": { "$gte": date, "$lt": endDate } })
Which just retrieves your single "write once a minute" item from "random" at any possible value within that minute.
So basically:
Round your input retrieved date to the minute
Search on the "range" betweeen that value and the next minute
I have 3 datefield in grid and when I am updating anything in row, it shows red mark on date field that means date fields are also modified but I am not making any change in any date field.
I tried to find out problem and I got following reason:
context.originalValues.dateCreated : 11/10/2014
context.originalValues.dateModified : 11/10/2014
context.originalValues.lastLogin : 11/10/2014
and
context.newValues.dateCreated : Mon Nov 10 2014 00:00:00 GMT+0530 (IST)
context.newValues.dateModified : Mon Nov 10 2014 00:00:00 GMT+0530 (IST)
context.newValues.lastLogin : Mon Nov 10 2014 00:00:00 GMT+0530 (IST)
so, grid shows these dates columns are updated. Is there any way to solve this issue.
Thanks in Advance.
Solved the issue :)
The date in store was in string format so created date object in Store, and now it is working fine. I used following codes to create date object in store.
{
name: 'lastLogin',
type: 'date',
dateFormat: 'n/j/Y',
convert: function (newValue, model)
{
return new Date(model.get('lastLogin'));
}
}
I would like to retrieve a list that contains an specified record under some conditions and only retrieve a number of records before and a number of records after that record. Are there any solutions?
For example, I have a MongoDB schema { id, date, section }
Data set:
100, 26 Aug 2014 11:00, A
110, 26 Aug 2014 11:01, A
140, 26 Aug 2014 12:00, A
141, 27 Aug 2014 12:00, B
200, 30 Aug 2014 11:00, A
210, 01 Sep 2014 11:01, B
290, 02 Sep 2014 12:00, A
300, 26 Sep 2014 12:00, A
301, 27 Oct 2014 12:00, B
302, 30 Oct 2014 11:23, A
410, 01 Oct 2014 15:01, B
590, 02 Oct 2014 12:00, A
600, 26 Nov 2014 00:00, A
I would like to get a list, which contains an unique id = 300 and 3 records before and 3 records after that record with id = 300, sorted by date under section A.
The output:
140, 26 Aug 2014 12:00, A
200, 30 Aug 2014 11:00, A
290, 02 Sep 2014 12:00, A
300, 26 Sep 2014 12:00, A <-- middle
302, 30 Oct 2014 11:23, A
590, 02 Oct 2014 12:00, A
600, 26 Nov 2014 00:00, A
I have a stupid approach:
get the date (let say it's 26 Sept 2014 12:00) of the specified id = 300 with section A
set a query to find records that the date is greater than and equal to 26 Sept 2014 12:00 ordered by date, limited by 3 records.
set a query to find records that the date is less than 26 Sept 2014 12:00 ordered by date, limited by 3 records.
combine two lists.
Is there any better approaches to just retrieve this kind of list in a query or in better performance? Thank you.
Let's your schema name be USER. You could use below mongo db query to fetch the result
$sort function :
1 represents ascending
-1 represents descending
Refer documentation : $Sort Documentation
Query will be :
db.user.aggregate({$match : { "id" : 300}},{$sort : {"date": 1 }},{$skip : 0},{$limit : 10});
$skip value will be your limit value after first query
db.user.aggregate({$match : { "id" : 300}},{$sort : {"date": 1 }},{$skip : 10},{$limit : 10});
Refer Documentation : Aggregation Documentation
$skip and $limit in aggregation framework
Here is a good example of using skip and limit which should help you achieve the SELECT TOP X or LIMIT X
Note: I'm assuming you want to use the aggregate framework based on the tagging of this question.
I believe this should do it
x = 300;
db.user.aggregate({$match : { "id" : {$lte: x+10,$gte: x-10 }},{$sort : {"date": 1 }}});
Trying to do a proof of concept of loading sample tick data into mongo db and the tick archive data is generally in utc and epoch and need to load it as is and output as utc only not local datetimes.
How to insert utc datetime and epoch in mongodb without being cast into utc again and retrieve the
same as utc only.
db.equity_ticks.insert(
{
"SNAPSHOT_DTTM" : Date("2013-07-09 19:00:00.000000"),
"CLOSE_DATE" : Date(15895) ,
"PREV_DAY_CLOSE_DATE" : Date(15895)
}
instead it inserted the local CST and output as CST too !
db.equity_ticks.find().pretty()
{
"_id" : ObjectId("52040942e5171b792b258ae8"),
"SNAPSHOT_DTTM" : "Thu Aug 08 2013 16:10:26 GMT-0500 (CDT)",
"CLOSE_DATE" : "Thu Aug 08 2013 16:10:26 GMT-0500 (CDT)",
"PREV_DAY_CLOSE_DATE" : "Thu Aug 08 2013 16:10:26 GMT-0500 (CDT)"
}
any help is appreciated.