static OrderBySetting FindProperties(IEdmEntityType entity)
{
var propertyNames = entity.Key().Any() switch
{
true => entity.Key().Select(k => k.Name),
false => entity.StructuralProperties()
.Where(p => p.Type.IsPrimitive() && !p.Type.IsStream())
.Select(p => p.Name)
.OrderBy(n => n)
.Take(1)
};
var orderBySettings = new OrderBySetting();
propertyNames.Aggregate(orderBySettings, (settings, name) =>
{
if (settings.Name is null)
{
settings.Name = name;
return(settings);
}
settings.ThenBy = new() { Name = name };
return(settings.ThenBy);
});
return(orderBySettings.Name is null ? null : orderBySettings);
}
}
}
private static Expression GetDefaultOrderByCall(this Expression expression, OrderBySetting settings)
{
return(settings.ThenBy is null
? GetMethodCall()
: GetMethodCall().GetDefaultThenByCall(settings.ThenBy));
Expression GetMethodCall() =>
expression.GetOrderByCall(settings.Name, nameof(Queryable.OrderBy));
}