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has_child

Synopsis​

@has_child(Expression) -> Boolean

Description​

Checks if the object has a direct child matching the provided logical expression.

info

Available in Contextal Platform 1.0 and later.

Parameters​

A logical expression, which should match for the child object.

Return value​

Boolean: true if there exists a child object matching the logical expression, false otherwise.

Examples​

@has_child(object_type == "Image")
  • This matches all objects, which have a child object of Image type.
object_type == "PE" &&                                   
    @has_child(object_type == "ZIP" &&            
        @has_child(object_type == "Text" &&
            @match_object_meta($natural_language_profanity_count > 0)
        )
    )
  • This matches a PE object, inside which a ZIP object is located (e.g. a self-extracting archive), which in turn contains a Text object with profanities.