at least their getting started docs...
i can do update the document upto two levels deep using $push operator
is any other way to update the document of this kind
I have a question. Mongo 3.6 provides document level locking. And it uses multiple granularity locks. Now if update request comes in, it will try to get IX lock on db ,then IX lock on Collection and then it will search for all the matching docs and will acquire X lock on them but if it fails it will go to queue and retry. But this problem can come again and again
How it is handled ?
I had a doubt!
I was exploring $group.
I wanted to match the data by a specific customer and then group by status and then group by priority on each status ( And retain the data from 1st grouping as well).
my product collection is like:
db.product.insert({
name: "shirt",
translations: [
{
language: "fr",
name: "chemise"
},
{
language: "es",
name: "camisa"
}
]
});
I need a query so that I will get: { name: camisa }
if the language is "es"
that returns a document with the field name in it
that is the spanish translation
Additionally, when I connect to the mongo shell of the said docker image, wehn I query the inserted document, there seems to be no result but I can see the db and the collection established
http://learnmongodbthehardway.com/schema/schemabasics/ In the last paragraph of Embedding session, it says:
The third problem is exposed when one tries to perform pagination of the comments. There is no way to limit the comments returned from the Blog Post using normal finds so we will have to retrieve the whole blog document and filter the comments in our application.
But there is $slice for that: db.posts.find( {}, { comments: { $slice: [ 20, 10 ] } } ). Am I wrong?
thank you
How can i remove lowest score of type homework
s/for/from
I just have an issue with installing mongodb compass community on ubuntu 18.04, I downloaded several versions but when I open it, it start loading then disappear
If it will not work forever, do you suggest using pycharm with pymongo or NoSQLBooster for mongodb?
My user has some listings stored on his document -> the listings are a listing of an "Item"
Items are part of a Category i.e Item "Hammer" category: "Tool"
Items are part of a Category i.e Item "Hammer" category: "Tool"
i don't think i want to nest items under their category I.E
Category : {
items: [Item, iTem, Item, Item]
name: "XYZ"
}
because then how will my Listing reference a specific item?
Category : {
items: [Item, iTem, Item, Item]
name: "XYZ"
}
because then how will my Listing reference a specific item?
@ShanonJackson disclaimer : I'm no mongo expert by a long shot. Why not separate Categories and Items ( products?) in 2 different collections ? This example might be relevant - http://learnmongodbthehardway.com/schema/categoryhierarchy/
$findRes = $collection->find(
array('N_NAME'=>' عبدالوهاب علي سليمان')
);
can u please help me to fix lang. issue
you have a white space at the start of your string maybe that is the issue. Mongodb supports utf8 only so you also need to make sure your string is utf8. Not sure what language you are using but you might need to check how you ensure a string is utf8 if the default for the language is not.
