Generic Entity Framework Pagination - entity-framework

Question

I am trying to write a generic way to provide pagination on my Link query to my MySQL database. However this required me to have a generic way to where, as the field used may differ from table to table. The issue i am facing it that Linq can't translate my generic types. Are there a way to do this that would work with Linq?
public static class PaginationExtentions {
public static async Task<PaginationResult<T>> Pagination<T, J>(this DbSet<J> dbSet, Pagination pagination, Func<IQueryable<J>, IQueryable<T>>? select) where J : class {
bool previousPage = false;
bool nextPage = false;
string startCursor = null;
string endCursor = null;
var property = typeof(J).GetProperty(pagination.SortBy);
string after = pagination.After != null ? Base64Decode(pagination.After) : null;
bool backwardMode = after != null && after.ToLower().StartsWith("prev__");
string cursor = after != null ? after.Split("__", 2).Last() : null;
List<J> items;
if (cursor == null) {
items = await (from s in dbSet
orderby GetPropertyValue<J, string>(s, pagination.SortBy) ascending
select s).Take(pagination.First)
.ToListAsync();
}
else if (backwardMode) {
items = await (from subject in (
from s in dbSet
where string.Compare( (string?)property.GetValue(s), cursor) < 0
orderby (string?)property.GetValue(s) descending
select s).Take(pagination.First)
orderby (string?)property.GetValue(subject) ascending
select subject).ToListAsync();
}
else {
items = await (from s in dbSet
where string.Compare((string?)property.GetValue(s), cursor) > 0
orderby GetPropertyValue<J, string>(s, pagination.SortBy) ascending
select s).Take(pagination.First)
.ToListAsync();
}
previousPage = await dbSet.Where(s => string.Compare((string?)property.GetValue(s), cursor) < 0).AnyAsync();
nextPage = items.Count == 0 ? false : await dbSet.Where(s => string.Compare((string?)property.GetValue(s), (string?)property.GetValue(items.Last())) > 0).AnyAsync();
var backwardsCursor = !previousPage ? null : "prev__" + cursor;
var forwardsCursor = !nextPage ? null : items.Count > 0 ? "next__" + (string?)property.GetValue(items.Last()) : null;
return new PaginationResult<T>() {
Items = select(items.AsQueryable()).ToList(),
TotalCount = await dbSet.CountAsync(),
HasPreviousPage = previousPage,
HasNextPage = nextPage,
StartCusor = Base64Encode(backwardsCursor),
EndCursor = Base64Encode(forwardsCursor)
};
}
private static U GetPropertyValue<T, U>(T obj, string propertyName) {
return (U)obj.GetType().GetProperty(propertyName).GetValue(obj, null);
}
public static string Base64Encode(string plainText) {
var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
return System.Convert.ToBase64String(plainTextBytes);
}
public static string Base64Decode(string base64EncodedData) {
var base64EncodedBytes = System.Convert.FromBase64String(base64EncodedData);
return System.Text.Encoding.UTF8.GetString(base64EncodedBytes);
}
}