public class CharacterTraits
{
[BsonId]
public int Index { get; set; }
public uint CharacterId { get; set; }
public uint TraitId { get; set; }
public SpoilerLevel SpoilerLevel { get; set; }
}List<CharacterTraits> characterTraitsList = new List<CharacterTraits>(); with multiple elements in it. But when I run the following command (dbCharTraits.InsertBulk(CharacterTraitsList);), I get the following error.
Hi! I've got a question about performance - I am using FindByOne method on my collection, but it seems like it takes some to load the document from the database. Here's my F# implementation of GetById repository
member this.GetById (id: string): 'a option =
let mapper = FSharpBsonMapper()
use db = new LiteDatabase(connectionString, mapper)
let collection = db.GetCollection<BsonDocument>(collectionName)
let queryResult = collection.FindById (BsonValue(id))
Option.fromBson queryResultAs I understood, _id is indexed automatically so it should be rather fast, isn't it? My DB file on the disc has approx. 30MB.
I just want to understand what happens that it's slow :-) I would appreciate any help/clarification
foreach (var fi in files)
{
var stream = fi.OpenRead();
return stream;
}
\\ in position 7."}
However, I have few issues like my objects use parameter constructors and I know by default the mapper doesn't handle that. I searched and saw that there are some solutions but the examples are super simple and I was wondering if anyone knows about a real project at everyone's disposal handling that case. Thanks
I did find a workaround though. If I add a private constructor with no parameter it works... That way nobody can call that constructor from outside so my entity integrity is kept. However I feel a bit weird with that though... The real solution would be to create my own mappers that will map to a the LiteDB entity version of the entity and use those in my Repository. Like that I won't touch the object itself, that should be kept pure in its app context regardless its repository DB type.
Any thoughts? Am I missing something that is already built-in?
So what would be the point to set several index if only one is used?
Also, how can you specify the one you wish to use? Or which one is used by default if there are several?
Eg: Some like this: col.Find(x => x.CustomerName == "John") must be converted to col.Find(Query.EQ("CustomerName", "John"))But the last question still stands, which is which one is used by default if there are several, assuming that a simple x.CustomerName == "John" would use an index
SELECT $ FROM post
INCLUDE categories,tags
where ANY( $.Categories[*].$id = 7) but getting > Left expression MAP($.Categories[*]=>@.$id) returns more than one result. Try use ANY or ALL before operant.
Hi, we have a service web API application that we're developing that runs on multiple platforms but over the holiday period our testers have found an issue when the service has been left running on linux (CentOS based system). When using the application there is a database call using shared mode and on opening the database it's throwing IOException on the global mutex.
Is there something I need to be doing to handle this situation (mutext has timed out or something?)
System.IO.IOException: The system cannot open the device or file specified. : 'Global\\A4BC81403E0F366B89A06D796FC65AC91A2AEF11.Mutex'
at System.Threading.Mutex.CreateMutexCore(Boolean initiallyOwned, String name, Boolean& createdNew)
at System.Threading.Mutex..ctor(Boolean initiallyOwned, String name)
at LiteDB.SharedEngine..ctor(EngineSettings settings)
at LiteDB.ConnectionString.CreateEngine()
at LiteDB.LiteDatabase..ctor(ConnectionString connectionString, BsonMapper mapper)
at LiteDB.LiteDatabase..ctor(String connectionString, BsonMapper mapper)Construction of LiteDatabase is effectively via this code...
using (var db = new LiteDatabase("filename=database.db;Connection=shared;ReadOnly=true") { UtcDate = true })
{
// do work
}
Hello, I wonder if it's safe to read a collection at the same time than another collection is being written to (the file is opened in shared mode) ?
@ju2pom Based on my understanding, it's safe to read and write to the same collection at the time using LiteDb. But I would suggest not to use "Shared" connection string though, I ran into some problem trying to do so in one of my projects. I solved it by using a Singleton repo layer for my app.
Hello, I wonder if it's safe to read a collection at the same time than another collection is being written to (the file is opened in shared mode) ?
@ju2pom Based on my understanding, it's safe to read and write to the same collection at the time using LiteDb. But I would suggest not to use "Shared" connection string though, I ran into some problem trying to do so in one of my projects. I solved it by using a Singleton repo layer for my app.
Thanks @jeeshenlee_twitter for your answer, sadly I can't use the Direct mode because I have also two processes accessing the same database.