can now toggle full update for updating documents (#244)

src/Typesense/ITypesenseClient.cs

@@ -315,17 +315,20 @@ public interface ITypesenseClient
 
     /// <summary>
     /// Updates documents in a collection using the supplied filter.
+    /// Partial update by default. Set full update to include everything in the update, also NULL values.
     /// </summary>
     /// <param name="collection">The collection name.</param>
     /// <param name="document">A documents of type T to update the filtered collection list with.</param>
     /// <param name="filter">The filter that is used to selected which documents that should be updated.</param>
+    /// <param name="filter">The filter that is used to selected which documents that should be updated.</param>
+    /// <param name="fullUpdate">Includes everything in the document, including NULL values.</param>
     /// <returns>A response containing a count of the updated documents.</returns>
     /// <exception cref="ArgumentException"></exception>
     /// <exception cref="TypesenseApiException"></exception>
     /// <exception cref="TypesenseApiBadRequestException"></exception>
     /// <exception cref="TypesenseApiNotFoundException"></exception>
     /// <exception cref="TypesenseApiServiceUnavailableException"></exception>
-    Task<FilterUpdateResponse> UpdateDocuments<T>(string collection, T document, string filter);
+    Task<FilterUpdateResponse> UpdateDocuments<T>(string collection, T document, string filter, bool fullUpdate = false);
 
     /// <summary>
     /// Batch import documents.

src/Typesense/TypesenseClient.cs

@@ -26,6 +26,8 @@ public class TypesenseClient : ITypesenseClient
     private static readonly MediaTypeHeaderValue JsonMediaTypeHeaderValue = MediaTypeHeaderValue.Parse($"{MediaTypeNames.Application.Json};charset={Encoding.UTF8.WebName}");
     private readonly HttpClient _httpClient;
 
+    private readonly JsonSerializerOptions _jsonSerializerDefault = new();
+
     private readonly JsonSerializerOptions _jsonNameCaseInsensitiveTrue = new() { PropertyNameCaseInsensitive = true };
 
     private readonly JsonSerializerOptions _jsonOptionsCamelCaseIgnoreWritingNull = new()
@@ -301,7 +303,7 @@ public async Task<UpdateCollectionResponse> UpdateCollection(
         return await Patch<UpdateCollectionResponse>($"/collections/{name}", jsonContent, _jsonNameCaseInsensitiveTrue).ConfigureAwait(false);
     }
 
-    public async Task<FilterUpdateResponse> UpdateDocuments<T>(string collection, T document, string filter)
+    public async Task<FilterUpdateResponse> UpdateDocuments<T>(string collection, T document, string filter, bool fullUpdate = false)
     {
         if (string.IsNullOrWhiteSpace(collection))
             throw new ArgumentException("cannot be null empty or whitespace", nameof(collection));
@@ -310,7 +312,7 @@ public async Task<FilterUpdateResponse> UpdateDocuments<T>(string collection, T
         if (string.IsNullOrWhiteSpace(filter))
             throw new ArgumentException("cannot be null empty or whitespace", nameof(filter));
 
-        using var jsonContent = JsonContent.Create(document, JsonMediaTypeHeaderValue, _jsonOptionsCamelCaseIgnoreWritingNull);
+        using var jsonContent = JsonContent.Create(document, JsonMediaTypeHeaderValue, fullUpdate ? _jsonSerializerDefault : _jsonOptionsCamelCaseIgnoreWritingNull);
 
         return await Patch<FilterUpdateResponse>($"collections/{collection}/documents?filter_by={Uri.EscapeDataString(filter)}&action=update", jsonContent, _jsonNameCaseInsensitiveTrue).ConfigureAwait(false);
     }
@@ -738,4 +740,4 @@ private static StringContent GetTextPlainStringContent(string jsonString)
     private MultiSearchResult<T> HandleDeserializeMultiSearch<T>(JsonElement jsonElement)
         => jsonElement.Deserialize<MultiSearchResult<T>>(_jsonNameCaseInsensitiveTrue)
         ?? throw new InvalidOperationException($"Could not deserialize {typeof(T)}, Received following from Typesense: '{jsonElement}'.");
-}
+}