Combine related-object filters with custom logic

Express the relationship rule you actually mean

When one object has two or more related-object filters, Related Object Filter Logic controls how CAB combines them. The custom option can mix parent and child relationships in one boolean expression.

Choose the combination mode

Open the filter editor for the object that owns the relationships, then use Related Object Filter Logic:

Choice shown in CAB	Use it when
All Child Relationship Filter Conditions Are Met	Every child relationship must qualify. This is the default.
Any Child Relationship Filter Conditions Are Met	At least one child relationship must qualify. This choice appears when the object has child relationships.
Custom Combination of Related Filters	You need an explicit combination of related filters, including parent relationships.

Write a custom expression

1. Choose Custom Combination of Related Filters.
2. Under Custom Expression, use the number shown beside each related-object filter.
3. Combine those numbers with AND, OR, and parentheses—for example, (1 OR 2) AND 3.
4. Select Save when the expression is valid.

Every related-object filter must be referenced at least once. CAB disables Save and shows a validation message for an unknown number, a missing relationship, unbalanced parentheses, or invalid syntax. In the redesigned canvas, numbered badges and the expression at the junction help you trace the rule back to its branches.

Relationship logic is separate from field logic

Related Object Filter Logic combines the connected object branches. The logic inside an individual object’s condition editor still controls how that object’s own field conditions are combined.

Review the expression after changing the graph

CAB adjusts expressions as related nodes are added or removed, but the business meaning may still change. Reopen the owning object, verify the numbered references, and test the audience before activation.