Fix issue: Id is null when anon. type is de/-serialized

mbdavid · Feb 20, 2024 · b3868f2 · b3868f2
1 parent 0b11316
commit b3868f2
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Showing 2 changed files with 31 additions and 2 deletions.
diff --git a/LiteDB.Tests/Document/Bson_Tests.cs b/LiteDB.Tests/Document/Bson_Tests.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using FluentAssertions;
 using Xunit;
@@ -115,5 +115,28 @@ public void Bson_Partial_Deserialize()
 
             doc4.ToString().Should().Be(src.ToString());
         }
+
+        [Fact]
+        public void BsonMapper_AnonymousType()
+        {
+            var mapper = new BsonMapper();
+
+            var obj = new
+            {
+                Id = 1,
+                Name = "John"
+            };
+
+            var doc = mapper.ToDocument(obj);
+            var obj2 = DeserializeAnonymous(mapper, doc, obj);
+
+            Assert.Equal(obj.Id, obj2.Id);
+            Assert.Equal(obj.Name, obj2.Name);
+
+            static T DeserializeAnonymous<T>(BsonMapper mapper, BsonDocument doc, T obj)
+            {
+                return mapper.Deserialize<T>(doc);
+            }
+        }
     }
 }
diff --git a/LiteDB/Client/Mapper/BsonMapper.Deserialize.cs b/LiteDB/Client/Mapper/BsonMapper.Deserialize.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Linq;
 using System.Collections;
 using System.Collections.Generic;
@@ -309,6 +309,12 @@ private object DeserializeAnonymousType(Type type, BsonDocument value)
             {
                 var arg = this.Deserialize(par.ParameterType, value[par.Name]);
 
+                //  if name is Id and arg is null, look for _id
+                if (arg == null && StringComparer.OrdinalIgnoreCase.Equals(par.Name, "Id") && value.TryGetValue("_id", out var id))
+                {
+                    arg = this.Deserialize(par.ParameterType, id);
+                }
+
                 args.Add(arg);
             }