one to many, update fileds from many side

[zerosix]

i have 2 entities A and B, one (A) to many (B) , form the B side (in formula i can get A attributes, but i can not update them), HELP

[victor]

In your case will work record\update: https://docs.espocrm.com/administrat.../#recordupdate.

For example, a One-to-Many relationship is established between entity Case and entity Account. We want to put value of the description field from entity Case into the description field of entity Account.

In Administration > Entity Manager > Case > Before Save Custom Script > Formula insert the formula:

record\update('Account', accountId, 'description', description); 

[zerosix]

Thank you victor, yes it works this way,
Account.description=description; way is not working