Loading...

Type: Bug
Resolution: Works as Designed
Priority: Unknown
Fix Version/s: None
Affects Version/s: 2.17.0
Component/s: LINQ3, Serialization
Labels:
None

i have the following custom BsonSerializerAttribute that is used to decorate string properties of entities. the serializer implementation simply stores the property value as ObjectId if it's a valid objectid or stores it as a string if not a valid objectid.

[AttributeUsage(AttributeTargets.Property, AllowMultiple = false)]
public class AsObjectIdAttribute : BsonSerializerAttribute
{
    public AsObjectIdAttribute() : base(typeof(ObjectIdSerializer)) { }

    private class ObjectIdSerializer : SerializerBase<string>
    {
        public override void Serialize(BsonSerializationContext ctx, BsonSerializationArgs args, string value)
        {
            if (value == null)
            {
                ctx.Writer.WriteNull(); return;
            }

            if (value.Length == 24 && ObjectId.TryParse(value, out var oID))
            {
                ctx.Writer.WriteObjectId(oID); return;
            }

            ctx.Writer.WriteString(value);
        }

        public override string Deserialize(BsonDeserializationContext ctx, BsonDeserializationArgs args)
        {
            switch (ctx.Reader.CurrentBsonType)
            {
                case BsonType.String:
                    return ctx.Reader.ReadString();

                case BsonType.ObjectId:
                    return ctx.Reader.ReadObjectId().ToString();

                case BsonType.Null:
                    ctx.Reader.ReadNull();
                    return null;

                default:
                    throw new BsonSerializationException($"'{ctx.Reader.CurrentBsonType}' values are not valid on properties decorated with an [AsObjectId] attribute!");
            }
        }
    }
}

the following works with LinqProvider.V2 but does not work with LinqProvider.V3

public class Person
{
    [BsonId, AsObjectId]
    public string Id { get; set; }

    public string Name { get; set; }
}

var person = new Person
{
    Id = ObjectId.GenerateNewId().ToString(),
    Name = "john doe"
};

await collection.InsertOneAsync(person);

var result = await collection
    .AsQueryable()
    .Where(x => x.Id == person.Id)
    .ToListAsync();

var matchesFound = result.Count > 0;

i believe the underlying cause is that LINQ3 translate the filter as

Unable to find source-code formatter for language: java. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml

"_id" : "62d6bfac3c2e5eef721c0a14"

while LINQ2 correctly translates the query to:

Unable to find source-code formatter for language: java. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml

"_id" : ObjectId("62d6bfac3c2e5eef721c0a14")

i've also tried implelemting IBsonDocumentSerializer on the serializer but it doesn't seem to make a difference. LINQ2 does however work without implementing the interface.

any advise would be highly appreciated in order to migrate my existing code to LINQ3.

thanks!

Details

Description

Attachments

Activity

People

Dates