Moved from astro.main.sourcecollection.AttributeCalculator

SourceCollectionOnTheFly/to_add_to_AC.py

+    def get_onthefly_dependencies_with_attributes(self, config=None, attributes=None):
+        """
+        Experimental functionality.
+
+        The dependency of an AttributeCalculator is a SourceCollection
+        that represents the same sources but with the attributes that
+        are required for the calculation.
+
+        The necessary attributes can only be known when the
+        AttributeCalculatorDefinition is known, which is currently
+        set by set_onthefly_attributes. Another option might be to
+        have the ACD itself as a dependency. The easiest way to achieve
+        that might be to make the ACD a 'raw'.
+        """
+        from astro.experimental.SourceCollection.SourceCollectionAttributesSelectedSourcesAll import SourceCollectionAttributesSelectedSourcesAll
+        dependencies_and_attributes = [
+            (
+                None,
+                SourceCollectionAttributesSelectedSourcesAll,
+                'parent_collection',
+                {
+                    'attributes': tuple(self.definition.input_attribute_names),
+                    'universe': attributes['universe'],
+                }
+            )
+        ]
+
+        return dependencies_and_attributes
+