Field data gets deleted on fieldname change

Frappe Framework Bug
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1

I had worked in django frapework since many years now. then i shifted a few months ago to ERPNext for better workaround.

The only thing which lags here is that, if we change fieldname from field1 to field 2 for instance. And commit the app, then update it on some other site which already has data in field1. The data is no more after update and field2 is empty.
Whereas in django, it automatically detected this behavior and told us whether we need to dump data or migrate field1 data to field2 and noted it inside the migration file. So next time when we updated django module on another, we had same data.

Does frappe has this feature currently to which i am not aware of?

Regards,
Chetan Nahar

2

Hello.

Currently Frappe does not recognize changes.

After renaming a field you have to make patch to move data to that field.

However if you want to rename custom field’s fieldname on live site you can do it by:

image

Note: if it is not System Generated

3

Hi, thanks for your swift response.

Can you guide me on "how to create patch, is their any documentation online for it?

I don’t require for custom fields, i require it for doctype fields in my personal app.

4

Maybe this PR will helpful to you:

PR: fix: set landed cost based on purchase invoice rate by mihir-kandoi · Pull Request #45947 · frappe/erpnext · GitHub

Field Renamed: fix: set landed cost based on purchase invoice rate by mihir-kandoi · Pull Request #45947 · frappe/erpnext · GitHub

Patch File: fix: set landed cost based on purchase invoice rate by mihir-kandoi · Pull Request #45947 · frappe/erpnext · GitHub

Patch Define: erpnext/erpnext/patches.txt at 3bb6a311de0c068954f25048ec7374de4a60bc5a · mihir-kandoi/erpnext · GitHub

Note: define your patch after [post_model_sync]

5

Thanks, I got it, will do for my own apps.