Add doc’s sequence number + primary term to get responses (#3767)

Add doc’s sequence number + primary term to get responses

Author: codebrain

src/Nest/Document/Multiple/MultiGet/Response/MultiGetHit.cs

@@ -23,6 +23,10 @@ public interface IMultiGetHit<out TDocument> where TDocument : class
 		string Type { get; }
 
 		long Version { get; }
+
+		long PrimaryTerm { get; }
+
+		long SequenceNumber { get; }
 	}
 
 	[JsonObject]
@@ -58,5 +62,11 @@ public class MultiGetHit<TDocument> : IMultiGetHit<TDocument>
 
 		[JsonProperty("_version")]
 		public long Version { get; internal set; }
+
+		[JsonProperty("_primary_term")]
+		public long PrimaryTerm { get; internal set; }
+
+		[JsonProperty("_seq_no")]
+		public long SequenceNumber { get; internal set; }
 	}
 }

src/Nest/Document/Single/Get/GetResponse.cs

@@ -33,6 +33,12 @@ public interface IGetResponse<out TDocument> : IResponse where TDocument : class
 
 		[JsonProperty("_version")]
 		long Version { get; }
+
+		[JsonProperty("_primary_term")]
+		long? PrimaryTerm { get; }
+
+		[JsonProperty("_seq_no")]
+		long? SequenceNumber { get; }
 	}
 
 	[JsonObject(MemberSerialization.OptIn)]
@@ -47,5 +53,7 @@ public class GetResponse<TDocument> : ResponseBase, IGetResponse<TDocument> wher
 		public TDocument Source { get; internal set; }
 		public string Type { get; internal set; }
 		public long Version { get; internal set; }
+		public long? PrimaryTerm { get; internal set; }
+		public long? SequenceNumber { get; internal set; }
 	}
 }

src/Tests/Tests/Document/Multiple/MultiGet/MultiGetApiTests.cs

@@ -170,6 +170,11 @@ protected override void ExpectResponse(IMultiGetResponse response)
 				hit.Id.Should().NotBeNullOrWhiteSpace();
 				hit.Found.Should().BeTrue();
 				hit.Version.Should().Be(1);
+				if (base.Cluster.ClusterConfiguration.Version >= "6.8.0")
+				{
+				    hit.PrimaryTerm.Should().BeGreaterOrEqualTo(1);
+				    hit.SequenceNumber.Should().BeGreaterOrEqualTo(0);
+				}
 				hit.Source.ShouldAdhereToSourceSerializerWhenSet();
 			}
 		}

src/Tests/Tests/Document/Single/DocumentCrudTests.cs

@@ -78,6 +78,11 @@ [I] protected async Task DocumentIsUpdated() => await AssertOnGetAfterUpdate(r =
 		{
 			r.Source.Should().NotBeNull();
 			r.Version.Should().BeGreaterThan(1);
+			if (base.Cluster.ClusterConfiguration.Version >= "6.8.0")
+			{
+				r.SequenceNumber.Should().BeGreaterOrEqualTo(1);
+				r.PrimaryTerm.Should().BeGreaterThan(0);
+			}
 			r.Source.Description.Should().EndWith("updated");
 		});
 

src/Tests/Tests/Document/Single/Get/GetApiTests.cs

@@ -45,6 +45,12 @@ protected override void ExpectResponse(IGetResponse<Project> response)
 			response.Source.Should().NotBeNull();
 			response.Source.Name.Should().Be(ProjectId);
 			response.Source.ShouldAdhereToSourceSerializerWhenSet();
+
+			if (base.Cluster.ClusterConfiguration.Version >= "6.8.0")
+			{
+				response.SequenceNumber.Should().BeGreaterOrEqualTo(0);
+				response.PrimaryTerm.Should().BeGreaterOrEqualTo(1);
+			}
 		}
 	}