Inserting account creation date from MongoDB into Handlebars? - javascript

I'm currently using MongoDB, NodeJS, and Handlebars and trying to convert user .id into a timestamp, then putting that timestamp into my HTML.
Right now, I can show the user.id on my website by writing {{ user.id }}, and I have a function that changes the id into a date:
var dateFromObjectId = function (objectId) {
return new Date(parseInt(objectId.substring(0, 8), 16) * 1000);
};
However, I'm having trouble piecing these two bits of information together to show the date on the website.
Any help would be appreciated; thanks!

You need to create handlebars helper:
Handlebars.registerHelper('toDate', function(objectId, options) {
return new Date(parseInt(objectId.toString().substring(0, 8), 16) * 1000);
});
and pass object id as an argument to it:
<p><b>Created at:</b> {{#toDate '58a4dd700000000000000000'}}{{/toDate}}</p>
So what you will see will be: Created at: Thu Feb 16 2017 00:00:00 GMT+0100
Assuming you are passing user MongoDB document from server in this form:
{
user: {
_id: ObjectId("58a62ef00000000000000000"),
first_name: "John",
last_name: "Doe"
}
}
You could use it like this:
<ul>
<li>First name: {{user.first_name}}</li>
<li>Last name: {{user.first_name}}</li>
<li>Created at: {{#toDate user._id}}{{/toDate}}</li>
</ul>
Try it out here.

Related

Change the format of date stored in MongoDB to display on the front end

So I have posts section on my site where users can post to the front page, I want to display on the page the date that each post was added. I have added a notice created line to my Schema below.
Post Schema
const noticeSchema = new mongoose.Schema({
noticeTitle: {
type: String,
required: true
},
noticeText: {
type: String,
required: true
},
author: {
type: mongoose.Schema.Types.ObjectId,
ref: 'User'
},
noticeCreated: {
type: Date, default: Date.now,
}
}, {timestamps: true
}
);
I am then displaying the noticeCreated date on the front end with EJS
Displaying with EJS
<%= notices.noticeCreated %>
The problem is its displaying like this
Fri Mar 04 2022 14:51:10 GMT+0000 (Greenwich Mean Time)
I Want it to display like this
04/03/2022
I must of spent 5+ hours trying to find a method to fix this but I can't find anything that's actually helped me. Obviously its just displaying how its stored in the mongoDB database, but is there a way i can change this?
Stored in the database like this
noticeCreated: 2022-03-04T14:51:10.927Z,
Also here is my route if that helps.
router.get('/:id', isLoggedIn, wrapAsync (async (req, res, next) => {
const { id } = req.params;
const notices = await Notice.findById(id).populate('author');
console.log(notices)
if (!notices) {
req.flash('error', 'This Notice Does Not Exist')
res.redirect('/notice')
}
res.render('notices/show', { notices })
}))
<div class="card-subtitle text-muted mb-2">
<%= article.createdAt.toLocaleDateString() %>
</div>
I use this in my frontend to store date as you mention. See Here
We can do this by the following example
var test= "1993-06-15T00:00:00.000+00:00"
alert( new Date(test).toLocaleDateString())

Inconsistent string to date conversion in Mongoose

Model:
const fooSchema = new mongoose.Schema({
fooCreationDate: {
type: Date
},
bar: [{
barCreationDate: {
type: Date
}
}]
});
const foo = mongoose.model(`foo`, fooSchema);
If we want to search for foo objects that were created between 2022-01-01 and 2022-01-02, we can use the following mongoose query:
foo.find({
fooCreationDate: {
$gte: "2022-01-01T00:00:00.000",
$lt: "2022-01-02T00:00:00.000"
}
});
Please note that I'm using strings instead of date objects. The reason is that the query is passed by the client through an AJAX call with dataType: "jsonp". Every date object that is passed like that to the backend is automatically converted to an ISO string. Despite that, the query works without any issues - the find function automatically parses dates represented as ISO strings.
We'd now like to extract every bar object that was created in the same time range, so we'll need to use an aggregation:
foo.aggregate([{
$unwind: `$bar`,
}, {
$match: {
"bar.barCreationDate": {
$gte: "2022-01-01T00:00:00.000",
$lt: "2022-01-02T00:00:00.000"
}
}
}]);
Unfortunately, nothing is found despite the fact that the database contains matching bar objects. This can be confirmed by passing Date objects instead of strings to the $match aggregation:
foo.aggregate([{
$unwind: `$bar`,
}, {
$match: {
"bar.barCreationDate": {
$gte: new Date("2022-01-01T00:00:00.000"),
$lt: new Date("2022-01-02T00:00:00.000")
}
}
}]);
This query returns some results, so the conclusion is that mongoose accepts ISO date strings in the find function, but can't handle them in the aggregate function.
Is there any known workaround? I could, for example, deep-scan every query object passed from the client and search for ISO date strings, then convert them to Date objects, but that's a bit dirty in my opinion. I'm using mongoose v5.6.4 and mongodb v4.2.2.

How to query for date ignoring its time in ISODate value [duplicate]

I've been playing around storing tweets inside mongodb, each object looks like this:
{
"_id" : ObjectId("4c02c58de500fe1be1000005"),
"contributors" : null,
"text" : "Hello world",
"user" : {
"following" : null,
"followers_count" : 5,
"utc_offset" : null,
"location" : "",
"profile_text_color" : "000000",
"friends_count" : 11,
"profile_link_color" : "0000ff",
"verified" : false,
"protected" : false,
"url" : null,
"contributors_enabled" : false,
"created_at" : "Sun May 30 18:47:06 +0000 2010",
"geo_enabled" : false,
"profile_sidebar_border_color" : "87bc44",
"statuses_count" : 13,
"favourites_count" : 0,
"description" : "",
"notifications" : null,
"profile_background_tile" : false,
"lang" : "en",
"id" : 149978111,
"time_zone" : null,
"profile_sidebar_fill_color" : "e0ff92"
},
"geo" : null,
"coordinates" : null,
"in_reply_to_user_id" : 149183152,
"place" : null,
"created_at" : "Sun May 30 20:07:35 +0000 2010",
"source" : "web",
"in_reply_to_status_id" : {
"floatApprox" : 15061797850
},
"truncated" : false,
"favorited" : false,
"id" : {
"floatApprox" : 15061838001
}
How would I write a query which checks the created_at and finds all objects between 18:47 and 19:00? Do I need to update my documents so the dates are stored in a specific format?
Querying for a Date Range (Specific Month or Day) in the MongoDB Cookbook has a very good explanation on the matter, but below is something I tried out myself and it seems to work.
items.save({
name: "example",
created_at: ISODate("2010-04-30T00:00:00.000Z")
})
items.find({
created_at: {
$gte: ISODate("2010-04-29T00:00:00.000Z"),
$lt: ISODate("2010-05-01T00:00:00.000Z")
}
})
=> { "_id" : ObjectId("4c0791e2b9ec877893f3363b"), "name" : "example", "created_at" : "Sun May 30 2010 00:00:00 GMT+0300 (EEST)" }
Based on my experiments you will need to serialize your dates into a format that MongoDB supports, because the following gave undesired search results.
items.save({
name: "example",
created_at: "Sun May 30 18.49:00 +0000 2010"
})
items.find({
created_at: {
$gte:"Mon May 30 18:47:00 +0000 2015",
$lt: "Sun May 30 20:40:36 +0000 2010"
}
})
=> { "_id" : ObjectId("4c079123b9ec877893f33638"), "name" : "example", "created_at" : "Sun May 30 18.49:00 +0000 2010" }
In the second example no results were expected, but there was still one gotten. This is because a basic string comparison is done.
To clarify. What is important to know is that:
Yes, you have to pass a Javascript Date object.
Yes, it has to be ISODate friendly
Yes, from my experience getting this to work, you need to manipulate the date to ISO
Yes, working with dates is generally always a tedious process, and mongo is no exception
Here is a working snippet of code, where we do a little bit of date manipulation to ensure Mongo (here i am using mongoose module and want results for rows whose date attribute is less than (before) the date given as myDate param) can handle it correctly:
var inputDate = new Date(myDate.toISOString());
MyModel.find({
'date': { $lte: inputDate }
})
Python and pymongo
Finding objects between two dates in Python with pymongo in collection posts (based on the tutorial):
from_date = datetime.datetime(2010, 12, 31, 12, 30, 30, 125000)
to_date = datetime.datetime(2011, 12, 31, 12, 30, 30, 125000)
for post in posts.find({"date": {"$gte": from_date, "$lt": to_date}}):
print(post)
Where {"$gte": from_date, "$lt": to_date} specifies the range in terms of datetime.datetime types.
db.collection.find({"createdDate":{$gte:new ISODate("2017-04-14T23:59:59Z"),$lte:new ISODate("2017-04-15T23:59:59Z")}}).count();
Replace collection with name of collection you want to execute query
MongoDB actually stores the millis of a date as an int(64), as prescribed by http://bsonspec.org/#/specification
However, it can get pretty confusing when you retrieve dates as the client driver will instantiate a date object with its own local timezone. The JavaScript driver in the mongo console will certainly do this.
So, if you care about your timezones, then make sure you know what it's supposed to be when you get it back. This shouldn't matter so much for the queries, as it will still equate to the same int(64), regardless of what timezone your date object is in (I hope). But I'd definitely make queries with actual date objects (not strings) and let the driver do its thing.
Use this code to find the record between two dates using $gte and $lt:
db.CollectionName.find({"whenCreated": {
'$gte': ISODate("2018-03-06T13:10:40.294Z"),
'$lt': ISODate("2018-05-06T13:10:40.294Z")
}});
Using with Moment.js and Comparison Query Operators
var today = moment().startOf('day');
// "2018-12-05T00:00:00.00
var tomorrow = moment(today).endOf('day');
// ("2018-12-05T23:59:59.999
Example.find(
{
// find in today
created: { '$gte': today, '$lte': tomorrow }
// Or greater than 5 days
// created: { $lt: moment().add(-5, 'days') },
}), function (err, docs) { ... });
db.collection.find({$and:
[
{date_time:{$gt:ISODate("2020-06-01T00:00:00.000Z")}},
{date_time:{$lt:ISODate("2020-06-30T00:00:00.000Z")}}
]
})
##In case you are making the query directly from your application ##
db.collection.find({$and:
[
{date_time:{$gt:"2020-06-01T00:00:00.000Z"}},
{date_time:{$lt:"2020-06-30T00:00:00.000Z"}}
]
})
You can also check this out. If you are using this method, then use the parse function to get values from Mongo Database:
db.getCollection('user').find({
createdOn: {
$gt: ISODate("2020-01-01T00:00:00.000Z"),
$lt: ISODate("2020-03-01T00:00:00.000Z")
}
})
Save created_at date in ISO Date Format then use $gte and $lte.
db.connection.find({
created_at: {
$gte: ISODate("2010-05-30T18:47:00.000Z"),
$lte: ISODate("2010-05-30T19:00:00.000Z")
}
})
use $gte and $lte to find between date data's in mongodb
var tomorrowDate = moment(new Date()).add(1, 'days').format("YYYY-MM-DD");
db.collection.find({"plannedDeliveryDate":{ $gte: new Date(tomorrowDate +"T00:00:00.000Z"),$lte: new Date(tomorrowDate + "T23:59:59.999Z")}})
mongoose.model('ModelName').aggregate([
{
$match: {
userId: mongoose.Types.ObjectId(userId)
}
},
{
$project: {
dataList: {
$filter: {
input: "$dataList",
as: "item",
cond: {
$and: [
{
$gte: [ "$$item.dateTime", new Date(`2017-01-01T00:00:00.000Z`) ]
},
{
$lte: [ "$$item.dateTime", new Date(`2019-12-01T00:00:00.000Z`) ]
},
]
}
}
}
}
}
])
For those using Make (formerly Integromat) and MongoDB:
I was struggling to find the right way to query all records between two dates. In the end, all I had to do was to remove ISODate as suggested in some of the solutions here.
So the full code would be:
"created": {
"$gte": "2016-01-01T00:00:00.000Z",
"$lt": "2017-01-01T00:00:00.000Z"
}
This article helped me achieve my goal.
UPDATE
Another way to achieve the above code in Make (formerly Integromat) would be to use the parseDate function. So the code below will return the same result as the one above :
"created": {
"$gte": "{{parseDate("2016-01-01"; "YYYY-MM-DD")}}",
"$lt": "{{parseDate("2017-01-01"; "YYYY-MM-DD")}}"
}
⚠️ Be sure to wrap {{parseDate("2017-01-01"; "YYYY-MM-DD")}} between quotation marks.
Convert your dates to GMT timezone as you're stuffing them into Mongo. That way there's never a timezone issue. Then just do the math on the twitter/timezone field when you pull the data back out for presentation.
Why not convert the string to an integer of the form YYYYMMDDHHMMSS? Each increment of time would then create a larger integer, and you can filter on the integers instead of worrying about converting to ISO time.
Scala:
With joda DateTime and BSON syntax (reactivemongo):
val queryDateRangeForOneField = (start: DateTime, end: DateTime) =>
BSONDocument(
"created_at" -> BSONDocument(
"$gte" -> BSONDateTime(start.millisOfDay().withMinimumValue().getMillis),
"$lte" -> BSONDateTime(end.millisOfDay().withMaximumValue().getMillis)),
)
where millisOfDay().withMinimumValue() for "2021-09-08T06:42:51.697Z" will be "2021-09-08T00:00:00.000Z"
and
where millisOfDay(). withMaximumValue() for "2021-09-08T06:42:51.697Z" will be "2021-09-08T23:59:99.999Z"
i tried in this model as per my requirements i need to store a date when ever a object is created later i want to retrieve all the records (documents ) between two dates
in my html file
i was using the following format mm/dd/yyyy
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script>
//jquery
$(document).ready(function(){
$("#select_date").click(function() {
$.ajax({
type: "post",
url: "xxx",
datatype: "html",
data: $("#period").serialize(),
success: function(data){
alert(data);
} ,//success
}); //event triggered
});//ajax
});//jquery
</script>
<title></title>
</head>
<body>
<form id="period" name='period'>
from <input id="selecteddate" name="selecteddate1" type="text"> to
<input id="select_date" type="button" value="selected">
</form>
</body>
</html>
in my py (python) file i converted it into "iso fomate"
in following way
date_str1 = request.POST["SelectedDate1"]
SelectedDate1 = datetime.datetime.strptime(date_str1, '%m/%d/%Y').isoformat()
and saved in my dbmongo collection with "SelectedDate" as field in my collection
to retrieve data or documents between to 2 dates i used following query
db.collection.find( "SelectedDate": {'$gte': SelectedDate1,'$lt': SelectedDate2}})

accessing mongodb's object from mapper (MapReduce)

I have an extra question based on the one I asked before:
calculate frequency using mongodb aggregate framework
so my data in MongoDB looks like this now:
{
"data": {
"interaction": {
"created_at": "Wed, 09 Apr 2014 14:38:16 +0000"
}
},
"_id": {
"$oid": "53455b59edcd5e4e3fdd4ebb"
}
}
before I used to have it like:
[
{
created_at: "2014-03-31T22:30:48.000Z",
id: 450762158586880000,
_id: "5339ec9808eb125965f2eae1"
}
]
so to access created_at I was using mapper like:
var mapper = function () {
if ( this.created_at.getTime() > ( last_date + 10000 ) ) {
...
but as the structure in my database has changed, I tried to change:
this.created_at.getTime()
to:
this.data.interaction.created_at.getTime()
but unfortunately it didn't work out. Thank you for any help
Hate to make this that simple but all you want to do when importing these date strings is this:
new Date("Wed, 09 Apr 2014 14:38:16 +0000")
Which will return a proper date type that you actually should be inserting as part of your data.

Modifying mongoose object literal result does not work [duplicate]

This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Why can’t you modify the data returned by a Mongoose Query (ex: findById)
First I am making the query to mongoDB, get all the correct results but only the small modification to object literal does not work. What I am trying to do, is adding new field to comments. I tried to use the DBref method but it didn't work so i make 2 queries now.
var query = Rss.findOne({ _id: itemId});
query.exec(function(err, feed) {
if (!err && feed.comments) {
console.log(feed.comments.length);
for (var index in feed.comments) {
var author = feed.comments[index].author;
if (author !== undefined) {
User.findById(author, function(err, user) {
/**Problem is here **/
feed.comments[index].name = 'Some random field';
console.log('Added new field' + util.inspect(feed));
});
}
}
}
});
Also the response is this without the missing .name field.
Added new field{ _id: 4f34f343c7b0434217000012,
original_link: 'http://com',
publish_date: Fri, 10 Feb 2012 10:36:00 GMT,
summary: 'some text',
title: 'title exampel',
comments:
[ { body: 'well',
author: 4f30265e6f60dc061d000002,
_id: 4f34f3b6f96c58541700000f,
create_date: Fri, 10 Feb 2012 10:38:46 GMT } ],
create_date: Fri, 10 Feb 2012 10:36:51 GMT }
// EDIT more information
Well i haven't found the answer but some how the console.log(feed.comments[index]) returns reference to function. Maybe someone who has more experience with mongoosejs could explain what would be workaround in this situation.
{ [Function] author: 'Some random field' }
You have to tell Mongoose to convert the result into a proper object. Before modifying the feed object simply call:
feed = feed.toObject();
And then you can add all the additional properties you want to it.

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