I'm using Entity Framework Core 6
and I want to find a series of entities in a DbSet
. The entities I want to obtain are the ones match some properties in a list of input objects.
I've tried something like this:
public IEnumerable<MyEntity> FindEntities(IEnumerable<MyEntityDtos> entries)
{
return dbContext.MyDbSet.Where(r => entries.Any(e => e.Prop1 == r.Prop1 && e.Prop2 == r.Prop2));
}
But I get the classic EF Core exception saying that my LINQ cannot be translated to a database query (the problem in particular is the entries.Any(...)
instruction)
I know I can just loop over the list of entries
and obtain the entities one by one from the DbSet, but that is very slow, I was wondering if there was a more efficient way to do this in EF Core that I don't know about.
I think this should work:
public IEnumerable<MyEntity> FindEntities(IEnumerable<MyEntityDtos> entries)
{
var props1=entries.Select(x=>x.Prop1).ToArray();
var props2=entries.Select(x=>x.Prop2).ToArray();
return dbContext.MyDbSet.Where(r => props1.Contains(r.Prop1) && props2.Contains(r.Prop2));
}
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