Description
Product
Hot Chocolate
Version
15.1.3
Link to minimal reproduction
https://github.com/HaroldH76/Hotchocolate-8252/
Steps to reproduce
The issue looks like the one of: #4318
But it might be slightly different. We are experiencing this issue with union types. I have downloaded the reproduction case of 4318 and upgraded it to the latest HotChocolate version 15.1.3. And that one worked ok.
Next I have updated it to use union types. And I have simplified the example and the database models and used some models of the HotChocolate documentation. And I have added support for in memory database.
What is expected?
When I query not the complete set of union types but a subset then I expect only that subset to be returned. For example when my union type consists of 2 types and I specify only one then only that one should be returned.
{
contents {
items {
... on TextContent {
text
}
}
}
}What is actually happening?
Depending on the query and depending if I use the in memory database or a real database I get:
- null as result or
- Exception of EF Core:
The client projection contains a reference to a constant expression of 'Reproduction.ImageContent'. This could potentially cause a memory leak; consider assigning this constant to a local variable and using the variable in the query instead.
Additional context
Se the readme of the reproduction case for more information and more example graphql queries:
https://github.com/HaroldH76/Hotchocolate-8252/