MongoTemplate find not returning results - mongodb

MongoTemplate not returning results.
Json:
{
"_id" : ObjectId("51acf6ab0d5d46077ae12b2a"),
"docType" : "row",
"value" : {
"entity" : {
"#id" : "1111",
"#version" : "3434",
"name" : "XY XY",
"listId" : 28,
"listCode" : "BS",
"entityType" : "03",
"createdDate" : "09/12/2006",
"lastUpdateDate" : "04/20/2011",
"source" : "CCC",
"address1" : "XXXXXXXX",
"city" : "CITY",
"country" : "CO",
"countryName" : "COUNTRY NAME"
}
},
"createdDate" : ISODate("2013-06-03T20:03:55.127Z"),
"createdBy" : "Test"
}
Query:
queryy = new Query(Criteria.where("docType").is("row").andOperator(Criteria.where("value.entity.city").is("CITY")));
Above query doesn't return any result back.
Am I missing something? Please help.


Try this:
query = new Query(Criteria.where("docType").is("row")
.and("value.entity.city").is("CITY"));
You're code doesn't need the andOperator function (as that translates to $and). It just needs multiple criteria using and.
And, you can use query.toString() to see what the output would be of the query (and compare it to what you might have used in the MongoDB shell.

Related

I cannot query with two collections joining with $lookup

can anyone help me? I have two collections. And I want to query joining these two collections. I used aggerate method and $lookup but I still get error.
First collection (bill_history)
{
"_id" : ObjectId("59856d04f81b08b4f61a6bea"),
"id" : 262.0,
"category" : "Beauty",
"holdername" : "Blue Planet",
"serviceid" : 156.0,
"keyword" : "BEA",
"source" : "8602",
"amount" : 84.0,
"billfrequency" : "daily",
"smsfrequency" : "1sms per day",
"type" : "Subscription",
"description" : "Beauty Tips",
"status" : "running",
"startdate" : "2016-09-10 11:28:47",
"enddate" : "1970-01-01 00:00:01",
"contact" : "12399188",
"remark" : "Content SMS Service (CMS)"
}
Second Collection (service)
{
"_id" : ObjectId("59856d04f81b08b4f61a6bea"),
"id" : 262.0,
"category" : "Beauty",
"holdername" : "Blue Planet",
"serviceid" : 156.0,
"keyword" : "BEA",
"source" : "8602",
"amount" : 84.0,
"billfrequency" : "daily",
"smsfrequency" : "1sms per day",
"type" : "Subscription",
"description" : "Beauty Tips",
"status" : "running",
"startdate" : "2016-09-10 11:28:47",
"enddate" : "1970-01-01 00:00:01",
"contact" : "12399188",
"remark" : "Content SMS Service (CMS)"
}
My Mongo Query Code is as below.
db.bill_history.aggregate([
{ $lookup : {
from : "service",
localField : "ref",
foreignField : "keyword",
as : "embaddedData"
}
}
])
Error message and code are as below.
"error msg":"exception: Unrecognized pipeline stage name: '$lookup'",
"code" : 16436,

Query MongoDB with DBRef

I have a table in mongo db called documents
{
"_id" : ObjectId("565a7f1"),
"_class" : "Document", "name" :
"Book Template",
"location" : "/Book Template.pdf",
"type" : DBRef("types", ObjectId("3eaabf5"))
},
{
"_id" : ObjectId("565a7f2),
"_class" : "Document",
"name" : "Sample Contract",
"location" : "/Sample Contract.pdf",
"type" : DBRef("types", ObjectId("3eaabf5"))
},
{
"_id" : ObjectId("565a7f3"),
"_class" : "Document",
"name" : "Clustering with RabbitMQ",
"location" : "/Clustering with RabbitMQ.txt",
"type" : DBRef("types", ObjectId("3eaabf6"))
}
and then I have a table called types
{
"_id" : ObjectId("3eaabf5"),
"_class" : "Type",
"name" : "PDF",
"description" : "Portable Document Format",
"extension" : ".pdf"
};
{
"_id" : ObjectId("3eaabf6"),
"_class" : "Type",
"name" : "NOTE",
"description" : "Text Notes",
"extension" : ".txt"
},
{
"_id" : ObjectId("3eaabf7"),
"_class" : "Type",
"name" : "WEB",
"description" : "Web Link",
"extension" : ".url"
}
I want to query the documents table for all documents which have an extension of PDF.
So I wrote the following queries... but everything returns empty results.
>db.documents.find({"types.$id":"3eaabf5"})
>
>db.documents.find({"types.name":"PDF"})
>

You may try this
db.documents.find({"type.$id":ObjectId("3eaabf5")}

How to count all occurrences of an element in MongoDB?

Let's say I have the following entries in my MongoDB.
{ "_id" : ObjectId("5474af69d4b28042fb63b81b"), "name" : "a", "time" : NumberLong("1412774562000"), "location" : "DE" }
{ "_id" : ObjectId("5474af69d4b28042fb63b81c"), "name" : "b", "time" : NumberLong("1412774562020"), "location" : "DE" }
{ "_id" : ObjectId("5474af69d4b28042fb63b81d"), "name" : "c", "time" : NumberLong("1412774562040"), "location" : "US" }
{ "_id" : ObjectId("5474af69d4b28042fb63b81e"), "name" : "d", "time" : NumberLong("1412774562060"), "location" : "AU" }
{ "_id" : ObjectId("5474af69d4b28042fb63b81f"), "name" : "e", "time" : NumberLong("1412774562080"), "location" : "CN" }
As a result, I need to know how often each specific "location" can be found in the database e.g.
{"DE": "2",
"US": "1",
"AU": "1",
"CN": "1"}
I have no information about all the different locations in the database so querying after a known location for example
db.c.find({"location": "DE"})
would not solve my problem.

You need to make use of the aggregation pipeline with a group and project stage operators.
db.c.aggregate([
{$group:{"_id":"$location","count":{$sum:1}}},
{$project:{"location":"$_id","occurance":"$count"}}
])

index search returns all subdocuments

I would like to only return my embedded documents titled 'Listings', based on the text search query. Where may I be going wrong? Creation of the index?
Here is my index:
db.Collection.ensureIndex({"Listings.Title": "text", "Listings.Description" : "text"}, {name: "Search"})
This returns the whole object, only want listings
db.AspNetUsers.runCommand("text", { search: "lawn" })
this returns just listings, but all the listings are included. Not the listings based on the search criteria e.g. 'lawn'
db.AspNetUsers.runCommand("text", { search: "lawn", project: {Listings:1}})
here is my object
{
"_id" : ,
"UserName" : "",
"PasswordHash" : "",
"SecurityStamp" : "",
"Roles" : [],
"Claims" : [],
"Logins" : [],
"ProfileData" : {
"BirthDate" : new Date("3/8/1974 00:00:00"),
"FirstName" : "",
"LastName" : "",
"MiddleName" : "",
"Address" : "",
"Address1" : ,
"City" : "",
"State" : "",
"PostalCode" : "",
"CellPhone" : "",
"HomePhone" : "",
"Location" : {
"type" : "Point",
"coordinates" : [, ]
}
},
"Email" : "",
"ConfirmationToken" : "Confirmed",
"IsConfirmed" : true,
"Listings" : [{
"_id" : ObjectId("5331ac28a5eabf2854085df5"),
"UserId" : ObjectId("5329b43fa5eabf0548490c27"),
"Title" : "Lawn Chairs",
"Description" : "lawn chairs",
"Pictures" : ["5331ac28a5eabf2854085df6", "5331ac28a5eabf2854085df7", "5331ac28a5eabf2854085df8"],
"Category" : {
"_id" : ObjectId("53273ce37dd6c71e1859ab77"),
"Title" : "Leisure"
}
}, {
"_id" : ObjectId("5331ac50a5eabf2854085df9"),
"UserId" : ObjectId("5329b43fa5eabf0548490c27"),
"Title" : "Lawn Ornaments",
"Description" : "lawn ornaments troll frog gnome",
"Pictures" : ["5331ac50a5eabf2854085dfa", "5331ac50a5eabf2854085dfb", "5331ac51a5eabf2854085dfc"],
"Category" : {
"_id" : ObjectId("53273cd57dd6c71e1859ab76"),
"Title" : "Home"
}
}, {
"_id" : ObjectId("5331ac71a5eabf2854085dfd"),
"UserId" : ObjectId("5329b43fa5eabf0548490c27"),
"Title" : "Cell Phone",
"Description" : "Samsung Galaxy S4",
"Pictures" : ["5331ac71a5eabf2854085dfe", "5331ac71a5eabf2854085dff", "5331ac72a5eabf2854085e00"],
"Category" : {
"_id" : ObjectId("53273cd57dd6c71e1859ab76"),
"Title" : "Home"
}
}]
}

You can get just the fields you want using a project parameter. For getting just the Listings element, you could try:
db.AspNetUsers.runCommand("text", {search:"lawn", project:{_id:0, Listings:1}})
EDIT:
The text command will return all documents that contain the search term. You'll get the entire document. If you further want to filter an array inside of the document, you can use the $elemMatch projection operator, in combination with $regex. For example:
db.AspNetUsers.runCommand("text", {
search: "lawn",
project: {_id:0, Listings:{$elemMatch:{ "Title": /lawn/i }}}
})

Using aggregation in MongoDB to select two or more fields of a document

I'm starting to work with MongoDB and I've a question about aggregation. I've a document that use a lot of different fields in different orders. For example:
db.my_collection.insert({ "answers" : [ { "id" : "0", "type" : "text", "value" : "A"}, { "id" : "1", "type" : "text", "value" : "B"}]})
db.my_collection.insert({ "answers" : [ { "id" : "0", "type" : "text", "value" : "C"}, { "id" : "1", "type" : "text", "value" : "A"}]})
I would to execute a query using "answers.id" with "answers.value" to obtain a result.
I tried but didn't get results, in my case, I executed the command:
db.my_collection.aggregate({$match: {"answers.id":"0", "answers.value": "A"}})
And the result was the two responses when I expected only:
{ "answers" : [ { "id" : "0", "type" : "text", "value" : "A"}, { "id" : "1", "type" : "text", "value" : "B"}]
Thank you!!!

You need to use the $elemMatch operator to match a single element of the answers array with both the specified 'id' and 'value'.
Something like this should work:
db.my_collection.aggregate( {
"$match" : {
"answers" {
"$elemMatch" : {
"id" : "0",
"value" : "A"
}
}
}
} )