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Version: 4.x

Object group operator

Object group operators are used for creating properties working with the current state of the object group on the form.

Syntax​

FILTER groupObjectId
VIEW groupObjectId
ORDER groupObjectId

Description​

Object group operators create properties that accept the same number of parameters as the number of objects in the object group. These operators cannot be used inside expressions.

The FILTER operator creates a property which value is TRUE when the object collection passed as parameters meets all the filtering conditions on the form, otherwise the property value will be NULL.

The VIEW operator creates a property which value is TRUE if the object collection passed as parameters is currently displayed on the form, otherwise, the property value will be NULL.

The ORDER operator creates a property which value determines the relative order of the object collection on the form passed as a parameter. The value of this property is usually used in ORDER blocks of the other properties, for example, PARTITION, FOR, etc.

Parameters​

Examples​

CLASS Store;
name = DATA STRING[100] (Store);

FORM stores
    OBJECTS s = Store
;
countF 'Number of filtered warehouses' = GROUP SUM 1 IF [ VIEW stores.s](Store s);
orderF 'Order in an object group' (Store s) = PARTITION SUM 1 IF [ FILTER stores.s](s) ORDER [ ORDER stores.s](s), s;
setNameX 'Add X to name'()  {
    LOCAL k = INTEGER ();
    k() <- 0;
    FOR [ FILTER stores.s](Store s) ORDER [ ORDER stores.s](s) DO {
        k() <- k() + 1;
        name(s) <- 'X' + k() + name(s);
    }
}