How to create index in Entity Framework 6.2 with code first

Question

Is there a way to create an index on a property/column using code-first, instead of using the new IndexAttribute ?

Answer 1

I write an extension method for use in fluent EF to avoid extra code:

public static PrimitivePropertyConfiguration HasIndexAnnotation(
    this PrimitivePropertyConfiguration primitivePropertyConfiguration, 
    IndexAttribute indexAttribute = null
    )
{
    indexAttribute = indexAttribute ?? new IndexAttribute();

    return primitivePropertyConfiguration
        .HasColumnAnnotation(
            IndexAnnotation.AnnotationName, 
            new IndexAnnotation(indexAttribute)
        );
}

then use it like this:

Property(t => t.CardNo)
    .HasIndexAnnotation();

or like this if index needs some configs:

Property(t => t.CardNo)
    .HasIndexAnnotation(new IndexAttribute("IX_Account") { IsUnique = true });