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Type: New Feature
Resolution: Duplicate
Priority: Unknown
Fix Version/s: None
Affects Version/s: 3.0.0
Component/s: Linq, Serialization
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Confidence Status:
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Assigned Teams:

Dotnet Drivers

Documentation Changes Summary:

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1. What would you like to communicate to the user about this feature?
2. Would you like the user to see examples of the syntax and/or executable code and its output?
3. Which versions of the driver/connector does this apply to?

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1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?

Aha! Reference:
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Tracking Level:
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Risk Status:
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Exec Notes:
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Goal Name:
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Currently `OfType` and `is` only work with the `HiearchicalDiscriminatorConvention`.

This is because with hierarchical discriminators the `_t` value lists all of the classes in the class hierarchy, which makes it possible to write MQL queries for `OfType` and `is`.

To support an `OfType` or `is` query in MQL requires a different query which lists all of the known subtypes in the query itself (rather than relying on them being stored in the `_t` field). This in turn requires that the `ScalarDiscriminatorConvention` implement the new `IScalarDiscriminatorConvention` interface ` and in particular the `GetDiscriminatorsForTypeAndSubTypes` method.

is depended on by

CSHARP-1907 Type discriminators don't work when collection document type is an interface

Ready for Work

CSHARP-3494 Discriminator conventions don't work properly with generic types

Ready for Work

CSHARP-4040 Serialization ignores discriminator field when checking for duplicate field names

Ready for Work

CSHARP-3985 Support multiple SerializerRegistry(s)

Investigating

is duplicated by

CSHARP-5344 "is" operator throwing error after upgrade to MongoDB.Driver 3.0

Closed

CSHARP-5353 OfType is not supported with the configured discriminator convention exception

Closed

CSHARP-5422 Querying polymorphic type causes NotSupportedException

Closed

is related to

CSHARP-5481 ScalarDiscriminatorConvention class should implement IScalarDiscriminatorConvention interface

Closed

(2 is duplicated by, 1 is related to)

Assignee:: Robert Stam

Reporter:: Robert Stam

Votes:: 0 Vote for this issue

Watchers:: 2 Start watching this issue

Created:: Oct 24 2024 09:10:35 PM UTC

Updated:: Feb 26 2025 01:04:10 AM UTC

Resolved:: Feb 26 2025 01:04:10 AM UTC

Confidence Status Last Update:: 26/Nov/24 5:24 PM

GA Target Date:: None

Public Preview Target Date:: None

Private Preview Target Date:: None

Experiment Target Date:: None

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