firstInstance

firstInstance(): InstanceType;

The firstInstance method of the Class class returns a reference to the first instance of the class. (See also "Caveat When Handling Persistent Class Instances", earlier in this section.)

The following examples show the use of the firstInstance method.

deleteAllInvestors() updating;
vars
    object : Object;
begin
    beginTransaction;
        app.setMarket(Market.firstInstance);
        foreach object in app.myMarket.allInvestors do
            delete object;
        endforeach;
    commitTransaction;
end;

// Check for first company setup
app.myCompany := Company.firstInstance;
if app.myCompany = null then
    beginTransaction;
        create coy;
        app.myCompany := coy;
    commitTransaction;
endif;