Develop Reference

How do I access and update nested Mongoose documents

I have a mongoose document that is a User. Each user has arrays or words e.g. nouns. I want to be able to update the fields of the words e.g. add a +1 to the frequency or change the status number. I can access the whole array but not the individual items in the array. Also i want to be able to display the items in the array based on their fields e.g. only display those with frequency of 3 or more etc...
I have tried lots of different things but I'm just not getting it. I keep getting back error messages that findOneAndUpdate is not a function, or 'undefined' when I try to access and update documents.
{
"_id" : ObjectId("5f7d8490c1842471c6bcea42"),
"username" : "eric#mail.com",
"nouns" : [
{
"_id" : ObjectId("5f7d849cc1842471c6bcea43"),
"word" : "die Sonne",
"timeStamp" : ISODate("2020-10-07T09:04:28.436Z"),
"frequency" : 0,
"status" : 0
},
{
"_id" : ObjectId("5f7d84a8c1842471c6bcea45"),
"word" : "das Wetter",
"timeStamp" : ISODate("2020-10-07T09:04:40.940Z"),
"frequency" : 0,
"status" : 0
},
{
"_id" : ObjectId("5f7d84afc1842471c6bcea47"),
"word" : "der Apfel",
"timeStamp" : ISODate("2020-10-07T09:04:47.403Z"),
"frequency" : 0,
"status" : 0
},
{
"_id" : ObjectId("5f7d84b9c1842471c6bcea49"),
"word" : "das Maedchen",
"timeStamp" : ISODate("2020-10-07T09:04:57.388Z"),
"frequency" : 0,
"status" : 0
},
{
"_id" : ObjectId("5f7d84c8c1842471c6bcea4b"),
"word" : "das Auto",
"timeStamp" : ISODate("2020-10-07T09:05:12.036Z"),
"frequency" : 0,
"status" : 0
}
],
"verbs" : [],
"adjectives" : [],
"others" : [],
"salt" : "*****",
"hash" : "*****",
"__v" : 5
}

figured it out after hours
const ObjectId = require('mongodb').objectID
db.collections.users.updateOne(
{},
{$set: {"nouns.$[element].status": 3}},
{multi: true,
arrayFilters: [{"element._id":
ObjectId(req.body.inputId)}]}
);

MongoDB - Finding the parent object based on a very nested property

I have a collection that consists of posts. Inside those post objects are properties about the post, one of which being an array of tags associated with the post. Inside the array of tags are more objects, each of which are the tags with a name property. I would like to get back all the posts from this collection which have a given tag in them based on the name of the tag.
Here is an example of a post object within the collection:
{
"_id" : ObjectId("5c6a0478cba09c148b497fc6"),
"tags" : [
{
"_id" : "5c69d974e05511106048780e",
"name" : "Food",
"text_color" : "#ffffff",
"bg_color" : "#02569b",
"createdAt" : "2019-02-17T22:00:20.143Z",
"updatedAt" : "2019-02-17T22:00:20.143Z",
"__v" : 0
},
{
"_id" : "5c69d95de05511106048780d",
"name" : "Drinks",
"text_color" : "#ffffff",
"bg_color" : "#0175c2",
"createdAt" : "2019-02-17T21:59:57.758Z",
"updatedAt" : "2019-02-17T21:59:57.758Z",
"__v" : 0
}
],
"title" : "Title of the post",
"body" : "body of the post",
"author_id" : ObjectId("5c5e0d3b647f12e949cbea1e"),
"author_name" : "garrett",
"likes_count" : 1,
"createdAt" : ISODate("2019-02-18T01:03:52.497Z"),
"updatedAt" : ISODate("2019-02-28T00:25:21.969Z"),
"__v" : 0,
"dislikes_count" : 0
}
Of course I have other post objects in this collection, some of which may have different tags. How can I get all posts with the food tag to be returned?

A basic find query will do the job here. Here's how it looks
const tagName = 'food;
db.posts.find({ 'tags.name': tagName }).then(console.log);

MeteorJS : UPDATE AN OBJECT inside array

I'm trying to update the comment_delete = 'false' to 'true' on the second object within an array. Help Please ....
"_id" : "jLkRdxocZzheefWF3",
"comments" : [
{
"comment_id" : "\u0003624334",
"comment" : " test",
"user" : "peter pan",
"userId" : "MQtp4i8bZeLYSLbr5",
"comment_delete" : "false"
},
{
"comment_id" : "\u0007973101",
"comment" : " add",
"user" : "peter pan",
"userId" : "MQtp4i8bZeLYSLbr5",
"comment_delete" : "false"
}
],
}

Try this query:
db.collection.update(
{_id:"jLkRdxocZzheefWF3"}, //add your first match criteria here, keep '{}' if no filter needed.
{$set:{"comments.$[element].comment_delete":"true"}},
{arrayFilters:[{"element.comment_id":"\u0007973101"}]}
)
I dont have an idea about your match criteria since you didnt mention it in the question. Change them as per your requirements. This change comment_delete to true as per the comment_id mentioned.
Output is:
{
"_id" : "jLkRdxocZzheefWF3",
"comments" : [
{
"comment_id" : "\u0003624334",
"comment" : " test",
"user" : "peter pan",
"userId" : "MQtp4i8bZeLYSLbr5",
"comment_delete" : "false"
},
{
"comment_id" : "\u0007973101",
"comment" : " add",
"user" : "peter pan",
"userId" : "MQtp4i8bZeLYSLbr5",
"comment_delete" : "true"
}
]
}

db.users.update({'_id':'jLkRdxocZzheefWF3',"comments.comment_id":"\u0007973101"},{$set:{'comments.$.comment_delete':true}})
Try above mentioned query it works

Handling Monggose schema change handling from string to string Array

My current doc is like this
{
"_id" : ObjectId("55ece69df332eb0000d34e12"),
"parent" : "P1",
"hierarchy" : {},
"hidden" : false,
"type" : "xyz",
"name" : "Mike",
"code" : "M110",
"date" : ISODate("2015-09-07T01:21:33.965Z"),
"__v" : 3,
"job_id" : "ca50fdf0-6904-11e6-b9af-1b0ea5d7f792"
}
now i want to have job_id as array instead. So i changed the field type to array in model schema. Now when I try to update the existing docs with some changes.
Document before saving looks like this
{
"_id" : ObjectId("55ece69df332eb0000d34e12"),
"parent" : "P1",
"hierarchy" : {},
"hidden" : false,
"type" : "xyz",
"name" : "Mike",
"code" : "M110",
"date" : ISODate("2015-09-07T01:21:33.965Z"),
"__v" : 3,
"job_id" : ["ca50fdf0-6904-11e6-b9af-1b0ea5d7f792",
"f1f04a95-42fa-41e5-a2c6-89c52c9c63f2"
]
}
so when i call model.save() method i'm getting following error:
{ [MongoError: The field 'job_id' must be an array but is of type String in document {_id: ObjectId('55ece69df332eb0000d34e12')}]
name: 'MongoError',
code: 16837,
err: 'The field \'job_id\' must be an array but is of type String in document {_id: ObjectId(\'55ece69df332eb0000d34e12\')}' }
What is the best way to handle this??

How to construct date range query?

My mongo document is as below
{{
"startTime" : "2012-12-06T18:30:00.000Z",
"endTime" : "2012-12-07T18:30:00.000Z",
"cost" : "40",
"_id" : ObjectId("50c31b65d2dfa2271b000001")
}
{
"startTime" : "2012-12-07T18:30:00.000Z",
"endTime" : "2012-12-08T18:30:00.000Z",
"cost" : "40",
"_id" : ObjectId("50c31b65d2dfa2271b000001")
}
{
"startTime" : "2012-12-05T18:30:00.000Z",
"endTime" : "2012-12-07T18:30:00.000Z",
"cost" : "40",
"_id" : ObjectId("50c31b65d2dfa2271b000001")
}
}
I have tried to query the mongo document based on the date range,
my query is as follows:
db.collection.find({"startTime":{"$gte":"2012-12-05T18:30:00.000Z"},"endTime": {"$lt":"2012-12-12T18:30:00.000Z"}});
Response is null...

Change your query as follows and it will return the result as expected.
db.collection.find({"startTime":{"$gte":ISODate("2012-12-05T18:30:00.000Z")},"endTime": {"$lt":ISODate("2012-12-12T18:30:00.000Z")}});