How set a value as selected on relate field

Hi Sino Thomas, I would love to help but you will need to give a few more details...

Let's say you have related field A which relates your current record to one in ModuleA.

You want to fill A based on field B. What kind of field is B? Is it also a relate field to ModuleA?

If B is in another module, how is the module that B is in (ModuleB) related to ModuleA?

Having a better picture of your scenario would help in trying to answer your question.

FrancescaS

I need to set MODULE A relate field (RL1) value in MODULE B Relate field (RL2) as default value when creating a new record in MODULE B. There is a one to many relationship from Module A to Module B

If you are creating B from a subpanel on record A you should be able to get the data for ModuleA using the context:

var parent_model = this.context.parent.get('model');

That model contains the parent id and the module IF you started from a subpanel on ModuleA when you were creating B. If you create directly from the B module then we don't know what A is and the parent_model will be empty. 

parent_model.get('id'); // will return the id of A record
parent_model.get('_module'); // will return the name of the A module

You can now get RL1 from A using parent_model.get('RL1') and copy it to RL2.

If you want to set RL2 when B is related to A regardless of where you are starting from, then you can use an after_relate logic hook. There you can retrieve the beans for both sides of the relationship and copy the relate field from A to B.

Be careful with the logic hook because it will override any other value you have in RL2 unless you put checks in place.

I hope this answers your question.

Francesca

Is it possible to achieve it by without code modification, that means by any option through the Administration? 

I can't think of a way, but that does not mean there isn't one.