Add support to inBackground parameter in ArangoSearch links (TG-208) (#359)

Author: jwierzbo

test/view_test.go

@@ -731,6 +731,7 @@ func TestArangoSearchViewProperties353(t *testing.T) {
 					},
 				},
 				IncludeAllFields: newBool(true),
+				InBackground:     newBool(false),
 			},
 		},
 	}
@@ -765,4 +766,5 @@ func TestArangoSearchViewProperties353(t *testing.T) {
 	require.Contains(t, analyzer.Features, driver.ArangoSearchAnalyzerFeaturePosition)
 	require.EqualValues(t, analyzer.Properties.Locale, "en_US")
 	require.EqualValues(t, analyzer.Properties.Case, driver.ArangoSearchCaseLower)
+	require.Equal(t, newBool(true), link.IncludeAllFields)
 }

view_arangosearch.go

@@ -408,6 +408,10 @@ type ArangoSearchElementProperties struct {
 	// Fields contains the properties for individual fields of the element.
 	// The key of the map are field names.
 	Fields ArangoSearchFields `json:"fields,omitempty"`
+	// If set to true, then no exclusive lock is used on the source collection during View index creation,
+	// so that it remains basically available. inBackground is an option that can be set when adding links.
+	// It does not get persisted as it is not a View property, but only a one-off option
+	InBackground *bool `json:"inBackground,omitempty"`
 }
 
 // ArangoSearchStoreValues is the type of the StoreValues option of an ArangoSearch element.