Hi Sarang,
Nanoflows are designed with offline-first applications in mind, as they allow you to model application logic that works in offline apps.
Therefore it is recommended to use nanoflows where no connection is needed .
Yes indeed you can perform a retrieve from database in the nanoflow but it will not be as per best practice suggested by Mendix and also will generate a database connection similar to microflow.
In these scenarios I would suggest to think about below questions:
1) Do you want the local In-memory objects and do not want to perform following actions :
2.If you need the database objects and want to commit the change then you can go for Microflows.
3. If you need to have a nanoflow for some custom page action and also a retrieve or any action with database , try to combine such activity in sub-microflow called from a nanoflow on logic need basis as per best practice .
For use case and impact on usage of different flows , you can try to see the below document as well.
https://docs.mendix.com/refguide/nanoflows/#2-when-to-use-nanoflows
Hi,
If you want to retrieve data from the database use the microflow retrieve. As nanoflows run in the client thus you would need to call a microflow in a nanoflow to retrieve data from the database.