Hi,
Is there any way to trigger a server side script based on the field like in client side scripts? I’ll explain.
frappe.ui.form.on("Doctype",{
fielda:(frm) {
frm.set_value("fieldb", "Script Running");
refresh_field("fieldb");
}
});
Whenever fielda is changed, this code snippet will save field B in fieldb. I want to achieve the same functionality with a server side script, with a field as a trigger instead of a doctype event. Is that possible? if so, how? Thanks
I “think” this should get you close. Assume the DocType is named Foo
Python file = ../erpnext/<name of module>/doctype/foo/foo.py
class Foo(Document):
def on_update(self):
# Get an object of the document's previous values:
doc_before_save = self.get_doc_before_save()
if not doc_before_save:
return
# Compare the value of 'fielda' before versus after:
if doc_before_save.fielda != self.fielda:
# The value of 'fielda' is different; so update fieldb
self.fieldb = 'Script Running'
self.save()
...
Not working 
My doctype is named Invoice PM and I made this changes to its .py file:
class InvoicePM(Document):
def on_update(self):
doc_before_save = self.get_doc_before_save()
if not doc_before_save:
return
if doc_before_save.fielda != self.fielda:
self.fieldb = 'Script Running'
self.save()
This doesn’t work, The value of fieldb is not affected in any way.
Strange.
Here’s an exact copy & paste from what I just tested with Customer DocType:
def on_update(self):
self.validate_name_with_customer_group()
self.create_primary_contact()
self.create_primary_address()
if self.flags.old_lead != self.lead_name:
self.update_lead_status()
if self.flags.is_new_doc:
self.create_lead_address_contact()
self.update_customer_groups()
# BEGIN TEST CODE
doc_before_save = self.get_doc_before_save()
if not doc_before_save:
return
if doc_before_save.account_manager != self.account_manager:
self.customer_name = self.customer_name + '-1'
self.save()
# END TEST CODE
Every time I update the Account Manager, another ‘-1’ is added to the end of the Customer’s name.
There’s a slight issue with this, It didnt work with my custom doctype so I created a new erpnext site and made tha changes to the customer.py file. The first time I changed the account manager and saved the form, it added -1 to the customer’s name. My main concern to do this was to set a field as a trigger, meaning whenever the field is changed, the script runs, rather than before_save or after_save or other triggers. I still have to save the form for the script to run.
The server doesn’t know when the field is changed. Not until you Save.
Client-side scripting is the only way.
On the server side script, use “Before Save” event check if the field has changed -
Refer to Server Side Documentation
and use
if doc.get_doc_before_save.your_field != doc.your_field :
do you solve this problem ?
i have same issue