linking data fields on different pages

What you want is to default the value of your custom field on Customers to the value of your custom field on CustomerClass. You could use a FieldDefaulting event to achieve this, but the easier option is to define a default value on the DAC field. This is similar to how your custom field definition should look on your DAC extension for Customer:

#region UsrCustomField2
[PXDBBool]
[PXDefault(typeof(SearchFor<CustomerClassExt.usrCustomField2>.
	In<SelectFrom<CustomerClass>.		Where<CustomerClass.customerClassID.IsEqual<Customer.customerClassID.FromCurrent>>>))]
[PXFormula(typeof(Default<Customer.customerClassID>))]
[PXUIField(DisplayName="Custom Field 2")]
public virtual bool? UsrCustomField2 { get; set; }
public abstract class usrCustomField2 : PX.Data.BQL.BqlBool.Field<usrCustomField2> { }
#endregion

The [PXDefault] attribute will search the customer class value that matches the current record’s customer class.

The [PXFormula] will cause the default value to be recalculated when the CustomerClassID of the Customer is changed.

thanks for responding. how would i go about doing it with an event handler? would i just paste that code into the customer dac? and replace the field name (usrcustomfield2 with Usrvip)

getting errors trying to put it in the dac. I have “customer” that has the region/field defenitions and then the Customermaint which would be the graph. how do i get to customer’s extension? I was trying some other things and i referred to customer as the dac extension but apperently thats the actual dac according to chatgpt..the code you provided im supposed to implement in ‘customer’ and im supposed to substitute Usrcustomfield with my custom field Usrvip right?

So you had used the DAC field generator thingy. You need to go delete that first because now the field is being defined in two places.

i’ve created new dacs that generate the fields from the database. my customers dac doesnt have a vip field even tho i have it on the page, i implemented the code on customers and it went through, tested it and it isnt working. how can i get the dac extensions? the one that already exists and where the fields im trying to reference are?

here

yes thank you