how to use $lookup stage in java with spring data mongodb? [duplicate]

how to use $lookup stage in java with spring data mongodb? [duplicate]

This question already has an answer here:

lookup in mongodb aggregation

1 answer

Up to last version of spring i have seen lot of stack over flow questions which shows there is no … Read the rest “how to use $lookup stage in java with spring data mongodb? [duplicate]”

Required subdocuments Mongoose

Required subdocuments Mongoose

I have defined the following Mongoose schemas
var subSchema = new Schema({
propertySub: {type: String, required: true}
});

var mainSchema = new Schema({
mainProperty: {type: String, required: true},
subs: [subSchema]
});

As you may see there is a required property on subSchema, … Read the rest “Required subdocuments Mongoose”

Mongoengine: Query a MapField

Mongoengine: Query a MapField

I have a map field that I want to query by. Something like:
class User(mongoengine.Document):
email = mongoengine.EmailField(required=False, unique=False)
username = mongoengine.StringField(max_length=30, min_length=6, required=True, unique=True)
password = mongoengine.StringField(max_length=500, min_length=6, required=True)
profiles = mongoengine.MapField(mongoengine.EmbeddedDocumentField(DeviceProfile))

So in the field, profiles, I store the … Read the rest “Mongoengine: Query a MapField”

MongoDump index conversion error of ‘bson.Decimal128’ not supported

MongoDump index conversion error of ‘bson.Decimal128’ not supported

Failed: error dumping metadata: error converting index (): conversion of BSON value ‘2’ of type ‘bson.Decimal128’ not supported

Any idea why this error is popping up? I am using the latest version (3.4) of mongo with … Read the rest “MongoDump index conversion error of ‘bson.Decimal128’ not supported”

E QUERY [thread1] SyntaxError: identifier starts immediately after numeric literal @(shell) in ‘mongodb’?

E QUERY [thread1] SyntaxError: identifier starts immediately after numeric literal @(shell) in ‘mongodb’?

my first mongodb query is executing perfectly while the second one the _id field is creatting some bug ?
for (var i = 1; i < = 25; i++){db.mediafiles.insert({x : i,from_email: '123@gmail.com'})} WriteResult({ "nInserted" : 1 }) for (var i = 1; i <= 25; i++){db.mediafiles.insert({x : i,from_email: '123@gmail.com',_id:59193333aed3eb391e396a5d})} E QUERY [thread1] SyntaxError: identifier starts immediately after numeric literal @(shell):1:90

Solutions/Answers:

Solution 1:

I will just explain

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How to get Collections name from Cosmos DB using Mongo API

How to get Collections name from Cosmos DB using Mongo API

I am trying to execute Mongo API to perform CRUD operation on Azure Cosmos-DB.

I am running the query on Azure Data explorer.
This is a query that I am executing {db.getCollectionNames()}

I am … Read the rest “How to get Collections name from Cosmos DB using Mongo API”

How to wait for a loop creating streams to finish before saving?

How to wait for a loop creating streams to finish before saving?

I have a problem with knowing when the loop is finished,
app.post(‘/api/books’, upload.array(‘images’), function(req, res) {
let book = req.body.book;
let arr = [];

// GridFS get connection with DB
var gfs = … Read the rest “How to wait for a loop creating streams to finish before saving?”

Meteor with query on publication is not reactive

Meteor with query on publication is not reactive

I have a problem with a meteor publication not being reactive when using a query inside it.
Let’s say I have many files, and each file has many projects, so I can go to the route:
http://localhost:3000/file/:file_id/projects… Read the rest “Meteor with query on publication is not reactive”

Conditionally Include Aggregation Pipeline Stages

Conditionally Include Aggregation Pipeline Stages

I have a function which get me some orders based on given parameters.
But, the parameter can be empty, in that case I want to leave the $match alone.
This is the code which I currently have:
if(req.query.status && typeof(req.query.status) … Read the rest “Conditionally Include Aggregation Pipeline Stages”