Document optional owned types

[spottedmahn]

I opened an issue asking for null owned types support and it was closed as a duplicate. The duplicate issue appears to be closed as implemented in 3.0 preview 4.

I don't see an open issue to update the documentation for 3.0 changes so I'm opening one 😊

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Document Details

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• ID: d02e6748-42e0-000a-4945-42cd05a0b875
• Version Independent ID: e3effbd0-07f2-423d-4032-1722e75adb37
• Content: Owned Entity Types - EF Core
• Content Source: entity-framework/core/modeling/owned-entities.md
• Product: entity-framework
• Technology: entity-framework-core
• GitHub Login: @AndriySvyryd
• Microsoft Alias: ansvyryd

[spottedmahn]

looks like this needs to be changed:

Reference navigations to owned entity types cannot be null unless they are explicitly mapped to a separate table from the owner

since it was implemented 😀

[spottedmahn]

nice, thanks!!

[matteocontrini]

looks like this needs to be changed:

Reference navigations to owned entity types cannot be null unless they are explicitly mapped to a separate table from the owner

@spottedmahn I read your comment but it seems that that statement still applies? From what I understand a property that references an owned entity can be null only if table splitting is used. Is that correct?

[spottedmahn]

Hi @matteocontrini - owned entities can be null w/o table splitting as of 3.0.

Sample code is here: https://stackoverflow.com/a/57596415/185123

[matteocontrini]

I then found that I was incurring in issue dotnet/efcore#18066, that's why I thought support wasn't there :)
Thanks!