I'm trying to remove from MongoDB collection an object (not document) that meets specific value condition, in this case - "Accessible" : "null" - while keeping other instances of this objects. I tried db.collection.update({}, {$unset: { "Accessible":"null"}}, false, true) but it removed all objects with "Accessible" key.Thanks in advance
My MongoDB collection before update
{
"_id" : ObjectId("52e5f09e8f3d99e1046abccc"),
"Name" : "Skyline",
"Accessible" : "Y"
}
{
"_id" : ObjectId("52e5f09e8f3d99e1046abccd"),
"Name" : "Highland",
"Accessible" : "null"
}
Desired result:
{
"_id" : ObjectId("52e5f09e8f3d99e1046abccc"),
"Name" : "Skyline",
"Accessible" : "Y"
}
{
"_id" : ObjectId("52e5f09e8f3d99e1046abccd"),
"Name" : "Highland"
}
You need to first identify the documents you wish to update and then unset that specific field:
db.collection.update(
{"Accessible" : "null"},
{$unset: { "Accessible" : ""}},
{ multi: true }
)
Further documentation on $unset operator:
http://docs.mongodb.org/manual/reference/operator/update/unset/
Related
I'v tried to perform the following query :
db.getCollection('fxh').find({"username": "user1", "pf.acc.accnbr" : 915177},{userid: true, "pf.pfid": true, "pf.acc.accid":true})
and my collection is the following :
{
"_id" : ObjectId("5932fd8f381d4c0a7de21942"),
"userid" : 1496513894,
"username" : "user1",
"email" : "user1#gmail.com",
"fullname" : "User 1",
"pf" : {
"acc" : [
{
"cyc" : [
{
"det" : {
"status" : "New",
"dcycid" : 1496513941
},
"status" : "New",
"name" : "QPT202017_M1",
"cycid" : 1496513940
}
],
"status" : "New",
"accnbr" : 915177,
"accid" : 1496513939
},
{
"cyc" : [
{
"det" : {
"status" : "New",
"dcycid" : 1496552643
},
"status" : "New",
"name" : "QPT202017_S8",
"cycid" : 1496552642
}
],
"status" : "New",
"accnbr" : 73497,
"accid" : 1496552641
}
],
"pfid" : 1496513935,
},
"lastupdate" : ISODate("2017-06-03T18:18:55.080Z"),
"__v" : 0
}
When I execute the query the result is the following :
{
"_id" : ObjectId("5932fd8f381d4c0a7de21942"),
"userid" : 1496513894,
"portfolio" : {
"acc" : [
{
"accid" : 1496513939
},
{
"accid" : 1496552641
}
],
"pfid" : 1496513935
}
}
And my problem is that I need to see only the concerned accid and the result returns the all accid !.
Any idea how just to return the selected accid of accnbr ?
NB : I have also tried to add $ sign at the end of my query , it
selects the right acc but it returns the all objects or I need just
only ONE returned object.
On 6/5/17
I also used the aggregate command instead of find and it get result by using this :
db.getCollection('fxh').aggregate([ { $unwind : "$pf.acc"} , { $match : {"username":"adh1", "pf.acc.accbr": 915177 } }, {$project : {_id:0, accid: "$pf.acc.accid"}}])
But could NOT get a lower level result, when I ran this :
db.getCollection('fxh').aggregate([ { $unwind : "$pf.acc.cyc"} , { $match : {"username":"adh1", "pf.acc.accbr": 915177, "pf.acc.cyc.name": "QPT202017_M1" } }, {$project : {_id:0, cycid: "$pf.acc.cyc.cycid"}}])
Any idea ?
You can try the below aggregation pipeline.
The idea is to $unwind one nested level at a time, starting from the outermost to the innermost.
For each nested level unwinding, you can apply the$match to limit the documents and continue till you have the desired shape.
You can $group it together at the end to get back to the original shape.
db.getCollection('fxh').aggregate([
{ $match : {"username":"adh1"} },
{ $unwind : "$pf.acc"} ,
{ $match : {"pf.acc.accbr": 915177 } },
{ $unwind : "$pf.acc.cyc"},
{ $match : {"pf.acc.cyc.name": "QPT202017_M1" } },
{$project : {_id:0, accid: "$pf.acc.accid", cycid: "$pf.acc.cyc.cycid"}}])
My query in lucene 6.2.0 goes like:
query query = new PhraseQuery.Builder()
.add(new Term("country","russia"))
.setSlop(1)
.build();
Basically among all my documents which are:
{
"_id" : ObjectId("586b723b4b9a835db416fa26"),
"name" : "test",
"countries" : {
"country" : [
{
"name" : "russia"
},
{
"name" : "USA china"
}
]
}
}
{
"_id" : ObjectId("586b73f24b9a835fefb10ca5"),
"name" : "nitika jain",
"countries" : {
"country" : [
{
"name" : "russia and denmrk"
},
{
"name" : "USA china"
}
]
}
}
{
"_id" : ObjectId("586b744f4b9a835fefb10ca7"),
"name" : "arjun",
"countries" : {
"country" : [
{
"name" : "russia pakistan"
},
{
"name" : "india iraq"
}
]
}
}
I want a document which has only russia. Ideally it should be the one highest scored, but instead I get something like "Found 3 hits."
Document<stored,indexed,tokenized<id:586b723b4b9a835db416fa26> stored,indexed,tokenized,omitNorms,indexOptions=DOCS<name:test> stored,indexed,tokenized,omitNorms,indexOptions=DOCS<countries:{ "country" : [ { "name" : "russia"} , { "name" : "USA china"}]}> stored,indexed,tokenized<country:russia> stored,indexed,tokenized<country:USA china>>**0.12874341**
Document<stored,indexed,tokenized<id:586b73f24b9a835fefb10ca5> stored,indexed,tokenized,omitNorms,indexOptions=DOCS<name:nitika jain> stored,indexed,tokenized,omitNorms,indexOptions=DOCS<countries:{ "country" : [ { "name" : "russia and denmrk"} , { "name" : "USA china"}]}> stored,indexed,tokenized<country:russia and denmrk> stored,indexed,tokenized<country:USA china>>**0.12874341**
Document<stored,indexed,tokenized<id:586b744f4b9a835fefb10ca7> stored,indexed,tokenized,omitNorms,indexOptions=DOCS<name:arjun> stored,indexed,tokenized,omitNorms,indexOptions=DOCS<countries:{ "country" : [ { "name" : "russia pakistan"} , { "name" : "india iraq"}]}> stored,indexed,tokenized<country:russia pakistan> stored,indexed,tokenized<country:india iraq>>**0.12874341**
All 3 results are equally scored. How can I get the document with only russia to be highest scored?
In Phrase queries, the slop is zero by default, requiring exact matches. that means that if you modify your query in this way:
query query = new PhraseQuery.Builder()
.add(new Term("country","russia"))
.build();
you'll get what you're looking for.
I recently run an Elasticsearch filter request that is
{
"from" : 0,
"size" : 10,
"query" : {
"filtered" : {
"filter" : {
"bool" : {
"must" : {
"terms" : {
"a_id" : [ 257793, 257798, 257844 ]
}
}
}
}
}
},
"explain" : false,
"fields" : "a_id"
}
So that I can find all docs with a_id in 257793, 257798, 257844 and the results are 257844, 257798, 257793. So far so good.
Then I find that whatever the sequence of the term numbers are, the return docs are always in the same a_id order. That is, even I run
"terms" : {
"a_id" : [257798, 257844, 257793 ]
}
The result docs are in the order of 257844, 257798, 257793 as well.
So I am so curious about the mechanism behind the Elasticsearch filtering. Can anyone help me and give me a hint?
By default, ES returns in descending order of _score. You can provide the sort option, to say in which order and based on what you want the results to be returned. For e.g., for based on date field
{
"sort": { "date": { "order": "desc" }}
"query" : {
"term" : { "user" : "kimchy" }
}
}
You can get more information:
https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-sort.html
https://www.elastic.co/guide/en/elasticsearch/guide/current/_sorting.html
Did anyone knows how to store data in mongoDB to be used with https://github.com/gian788/i18next-node-mongodb-backend. Tried couple of things and its not translating keys.
Here is how I am storing my data in mongo
{"en" : { "translation" : { "FirstName" : "First Name", "LastName" : "Lastwq Name" } } }
While printing it always prints key with error
i18next::translator: missingKey en translation FirstName FirstName
Any help?
The format is the following :
{
"_id" : ObjectId("581f3645caa6b31c074dd91c"),
"language" : "en",
"namespace" : "translation",
"data" : {
"FirstName" : "First Name",
"LastName" : "Lastwq Name"
}
}
Obviously you can change the namespace in the init options
I am having a little trouble with nested queries in mongodb.
I have a collection with the following structure --
{
"_id" : Objectid(..),
"result" : {
"name" : nameValue,
"reference" : base64Value,
"city" : cityValue
}
}
Now I am to do two queries in the mongo shell -
search for a specific reference value (so query for equality)
I am using the following query -
db.TestCollection.find("result.reference" : a3d245e343 }
but I get nothing when I know the record is there in the collection
search and print for all city values.
I am looking to print something like this--
{ "city": "new york city" }
{ "city" : "brooklyn" }
... etc
For this I use this query --
db.TestCollection.find( {}, {"results.city", 1} )
For this I do not get the output I was hoping for but only get a list of all "_id" values like this --
{ "_id" : ObjectId("52e466bd562bdb7b1b320d1d") }
{ "_id" : ObjectId("52e466be562bdb7b1b320d1e") }
{ "_id" : ObjectId("52e466be562bdb7b1b320d1f") }
{ "_id" : ObjectId("52e466bf562bdb7b1b320d20") }
{ "_id" : ObjectId("52e466bf562bdb7b1b320d21") }
{ "_id" : ObjectId("52e466bf562bdb7b1b320d22") }
{ "_id" : ObjectId("52e466c0562bdb7b1b320d23") }
{ "_id" : ObjectId("52e466c0562bdb7b1b320d24") }
{ "_id" : ObjectId("52e466c1562bdb7b1b320d25") }
{ "_id" : ObjectId("52e466c1562bdb7b1b320d26") }
{ "_id" : ObjectId("52e466c2562bdb7b1b320d27") }
{ "_id" : ObjectId("52e466c2562bdb7b1b320d28") }
{ "_id" : ObjectId("52e466c2562bdb7b1b320d29") }
{ "_id" : ObjectId("52e466c3562bdb7b1b320d2a") }
{ "_id" : ObjectId("52e466c3562bdb7b1b320d2b") }
{ "_id" : ObjectId("52e466c4562bdb7b1b320d2c") }
{ "_id" : ObjectId("52e466c4562bdb7b1b320d2d") }
{ "_id" : ObjectId("52e466c4562bdb7b1b320d2e") }
{ "_id" : ObjectId("52e466c5562bdb7b1b320d2f") }
{ "_id" : ObjectId("52e466c5562bdb7b1b320d30") }
has more
What am I doing wrong?
I know there are lot of questions regarding queries but I am still wrapping my head around the whole idea. Thanks for helping a newbie out.
I found the issue with both the commands -
For some reason the condition should be given in single quotes like this --
db.TestCollection.find('result.reference' : a3d245e343 }
I thought I can use double quotes in there but looks like I am wrong.
I was using a comma instead of a colon in the projector. The correct answer is -
db.TestCollection.find( {}, {"results.city" : 1} )