EF Core: The LINQ expression could not be translated - entity-framework

Question

I am trying to implement a query in EF Core in which I need to get data where any name in a string array is contained by the name of the data object. Here is the code sample:
var searchKeys = search.Split(' ');
var objects = _db.Objects
.Where(o => searchKeys.Any(k => o.name.Contains(k))))
.OrderBy(o => o.Name)
.Select o
But the query cannot be translated resulting in the following error:
The LINQ expression 'DbSet
.Where(o => __searchKeys_1
.Any(k => __Functions_2
.Contains(
_: o.Name,
propertyReference: k)))' could not be translated. Either rewrite the query in a form that can be translated, or switch
to client evaluation explicitly by inserting a call to either
AsEnumerable(), AsAsyncEnumerable(), ToList(), or ToListAsync(). See
https://go.microsoft.com/fwlink/?linkid=2101038 for more information.
How can I contruct the query to fix the error?

Answer 1

For some reason, I could not get Obie's answer to work for me in .Net Core 3.1. Luckily, the LinqKit NuGet package has been upgraded for .Net Core. So I defined this extension method:
// Where any search predicates are true.
public static IQueryable<T> WhereAny<T>(this IQueryable<T> q, params Expression<Func<T, bool>>[] predicates)
{
var orPredicate = PredicateBuilder.New<T>();
foreach (var predicate in predicates)
{
orPredicate = orPredicate.Or(predicate);
}
return q.AsExpandable().Where(orPredicate);
}
And then you would use it like this:
var searchKeys = search.Split(' ');
var predicates = searchKeys.Select(k => (Expression<Func<MyObject, bool>>)(x => x.Name.Contains(k)));
var objects = _db.Objects
.WhereAny(predicates.ToArray())
.OrderBy(o => o.Name);

Answer 2

This works for me:
var searchKeys = search.Split(' ');
var objects = _db.Objects
.Where(o => searchKeys.Any(k => o.Name.Contains(k)))
.OrderBy(o => o.Name)
.Select(o => o);