Support for Self-Referencing ManyToMany Relationships

[askvortsov1]

Description

• When trying to use HasManyThrough on a self-referencing ManyToMany relationship, an error is thrown. This is because SingleOrDefault is used to find the left and right joining properties:

  JsonApiDotNetCore/src/JsonApiDotNetCore/Builders/ResourceGraphBuilder.cs

  Line 160 in 9d7614f

  hasManyThroughAttribute.LeftProperty = throughProperties.SingleOrDefault(x => x.PropertyType == entityType)

  . A special case should be added if the property annotated by HasManyThrough is an IEnumerable of the same type as the current class.

Environment

• JsonApiDotNetCore Version: v4.0.0-alpha5
• Other Relevant Package Versions: Asp Net Core 3.1

[bart-degreed]

I'm not sure I understand how this would work. Can you post your resource class and related join type?

[maurei]

Closing due to inactivity. Feel free to reply with new information and we'll reconsider.

[bart-degreed]

@askvortsov1 We have a fix for this in c0ed9a9 (part of #874).