Improve recursive search for DELETE.

lakesuperior/model/ldpr.py

@@ -429,8 +429,8 @@ class Ldpr(metaclass=ABCMeta):
         refint = self.rdfly.config['referential_integrity']
         inbound = True if refint else inbound
 
-        children = self.imr[nsc['ldp'].contains * '+'] \
-                if delete_children else []
+        children = (self.rdfly.get_recursive(self.uid, nsc['ldp'].contains)
+                if delete_children else [])
 
         if leave_tstone:
             ret = self._bury_rsrc(inbound)

lakesuperior/store_layouts/ldp_rs/rsrc_centric_layout.py

@@ -250,9 +250,6 @@ class RsrcCentricLayout:
 
         gr = self._parse_construct(qry, init_bindings={
             'rsrc': nsc['fcres'][uid],
-            'ag': nsc['fcadmin'][uid],
-            'mg': nsc['fcmain'][uid],
-            'sg': nsc['fcstruct'][uid],
         })
 
         if incl_inbound and len(gr):
@@ -354,6 +351,26 @@ class RsrcCentricLayout:
         return self._parse_construct(qry, init_bindings={'s': uri})
 
 
+    def get_recursive(self, uid, predicate):
+        '''
+        Get recursive references for a resource predicate.
+
+        @param uid (stirng) Resource UID.
+        @param predicate (URIRef) Predicate URI.
+        '''
+        ds = self.ds
+        uri = nsc['fcres'][uid]
+        def recurse(dset, s, p):
+            new_dset = set(ds[s : p])
+            for ss in new_dset:
+                dset.add(ss)
+                if set(ds[ss : p]):
+                    recurse(dset, ss, p)
+            return dset
+
+        return recurse(set(), uri, predicate)
+
+
     def patch_rsrc(self, uid, qry):
         '''
         Patch a resource with SPARQL-Update statements.