add channel table.

models/channel.go

@@ -9,6 +9,21 @@ type Channel struct {
 	LocationName string `bson:"locationName,omitempty"`
 }
 
+func (channel *Channel) ApplyUpdate(update ChannelUpdate) {
+	if update.Logged != nil {
+		channel.Logged = *update.Logged
+	}
+	if update.Hub != nil {
+		channel.Hub = *update.Hub
+	}
+	if update.EventName != nil {
+		channel.EventName = *update.EventName
+	}
+	if update.LocationName != nil {
+		channel.LocationName = *update.LocationName
+	}
+}
+
 // IsChangeObject is an interface implementation to identify it as a valid
 // ChangeObject in GQL.
 func (*Channel) IsChangeObject() {