optional text search and filter

@dj-nitehawk thank you for this great library.

I need little help.

I can apply a text search filter and field filter like this without no problem:

        [HttpGet("search-filter")]
        public async Task<IActionResult> SearchAndFilter(FilterProductDTO filter)
        {
            var products = await DB.Find<ProductEntity>()
                    .Match(Search.Full, filter.SearchTerm)
                    .ManyAsync(a => a.Category == filter.CategoryId);

            return Ok(products);
        }      

    public class FilterProductDTO
    {
        public string CategoryId { get; set; }
        public string SearchTerm { get; set; }
        public decimal? MinPrice { get; set; }
        public decimal? MaxPrice { get; set; }
        public bool? IsInStock { get; set; }
    }

But I want to apply these filters optionally, only if they are not null or empty I want to apply.

I guess this can be accomplished with linq IQueryable features. But is it possible to apply text search in linq?

[susahin80]

Your last example worked perfectly, thank you very much.

[dj-nitehawk]

actually, this can also be done in an easier way with the find interface like so:

var query = DB.Find<Product, Product>();

if (!string.IsNullOrEmpty(dto.SearchTerm))
    query.Match(Search.Full, dto.SearchTerm);

if (dto.MinPrice.HasValue)
    query.Match(p => p.Price <= dto.MinPrice.Value);

if (!string.IsNullOrEmpty(dto.SearchTerm))
    query.SortByTextScore();

var result = await query.ExecuteAsync();