Entity with Multiple Child Entities
Posted by: Aaron J
Date: December 06, 2021 10:52AM


our Dev tools .Net, C# and MySQL community server 8.0.26. Project using MySql.Data as data driver and MySql.Data.EntityFramework for EF.

Trying fetch related tables via LINQ to Entities as below

.Include(o => o.EntityA.ChildEntityB)
.Include(o => o.EntityA.ChildEntityc)
.Include(o => o.EntityX)
.Include(o => o.EntityY)
.Include(o => o.EntityZ)

EntityA has relation(1:m) to two child Entities ChildEndityB and ChildEndityC.

Above query as is returning error, "Unknown column 'Join7.OrderId' in 'on clause'". When i looked at the SQL generated, it is trying access Select alias "Join7" where it is out of scope.

If comment out either ".Include(o => o.EntityA.ChildEntityB)" or ".Include(o => o.EntityA.ChildEntityc)" Include statment, then the query works fine.

Please advise or do let me know if you need any more information.

Thanks in advance

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Entity with Multiple Child Entities
December 06, 2021 10:52AM

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