fix 151 and 374 - cascades to part tables must be from parent tables.

CHANGELOG.md

@@ -8,6 +8,7 @@
 * Add - implement multiprocessing in populate (#695) PR #704, #969
 * Bugfix - Dependencies not properly loaded on populate. (#902) PR #919
 * Bugfix - Replace use of numpy aliases of built-in types with built-in type. (#938) PR #939
+* Bugfix - Deletes and drops must include the master of each part. (#151, #374) PR #957
 * Bugfix - `ExternalTable.delete` should not remove row on error (#953) PR #956
 * Bugfix - Fix error handling of remove_object function in `s3.py` (#952) PR #955
 * Bugfix - Fix regression issue with `DISTINCT` clause and `GROUP_BY` (#914) PR #963
@@ -134,7 +135,7 @@
 * Fix #628 - incompatibility with pyparsing 2.4.1
 
 ### 0.11.1 -- Nov 15, 2018
-* Fix ordering of attributes in proj (#483 and #516)
+* Fix ordering of attributes in proj (#483, #516)
 * Prohibit direct insert into auto-populated tables (#511)
 
 ### 0.11.0 -- Oct 25, 2018

datajoint/autopopulate.py

@@ -63,7 +63,8 @@ def _rename_attributes(table, props):
                 if props['aliased'] else table.proj())
 
         if self._key_source is None:
-            parents = self.target.parents(primary=True, as_objects=True, foreign_key_info=True)
+            parents = self.target.parents(
+                primary=True, as_objects=True, foreign_key_info=True)
             if not parents:
                 raise DataJointError('A table must have dependencies '
                                      'from its primary key for auto-populate to work')
@@ -74,17 +75,19 @@ def _rename_attributes(table, props):
 
     def make(self, key):
         """
-        Derived classes must implement method `make` that fetches data from tables that are
-        above them in the dependency hierarchy, restricting by the given key, computes dependent
-        attributes, and inserts the new tuples into self.
+        Derived classes must implement method `make` that fetches data from tables
+        above them in the dependency hierarchy, restricting by the given key,
+        computes secondary attributes, and inserts the new tuples into self.
         """
-        raise NotImplementedError('Subclasses of AutoPopulate must implement the method `make`')
+        raise NotImplementedError(
+            'Subclasses of AutoPopulate must implement the method `make`')
 
     @property
     def target(self):
         """
         :return: table to be populated.
-        In the typical case, dj.AutoPopulate is mixed into a dj.Table class by inheritance and the target is self.
+        In the typical case, dj.AutoPopulate is mixed into a dj.Table class by
+        inheritance and the target is self.
         """
         return self
 
@@ -111,11 +114,14 @@ def _jobs_to_do(self, restrictions):
 
         if not isinstance(todo, QueryExpression):
             raise DataJointError('Invalid key_source value')
-        # check if target lacks any attributes from the primary key of key_source
+
         try:
+            # check if target lacks any attributes from the primary key of key_source
             raise DataJointError(
-                'The populate target lacks attribute %s from the primary key of key_source' % next(
-                    name for name in todo.heading.primary_key if name not in self.target.heading))
+                'The populate target lacks attribute %s '
+                'from the primary key of key_source' % next(
+                    name for name in todo.heading.primary_key
+                    if name not in self.target.heading))
         except StopIteration:
             pass
         return (todo & AndList(restrictions)).proj()
@@ -126,7 +132,8 @@ def populate(self, *restrictions, suppress_errors=False, return_exception_object
         """
         table.populate() calls table.make(key) for every primary key in self.key_source
         for which there is not already a tuple in table.
-        :param restrictions: a list of restrictions each restrict (table.key_source - target.proj())
+        :param restrictions: a list of restrictions each restrict
+            (table.key_source - target.proj())
         :param suppress_errors: if True, do not terminate execution.
         :param return_exception_objects: return error objects instead of just error messages
         :param reserve_jobs: if True, reserve jobs to populate in asynchronous fashion
@@ -259,5 +266,6 @@ def progress(self, *restrictions, display=True):
             print('%-20s' % self.__class__.__name__,
                   'Completed %d of %d (%2.1f%%)   %s' % (
                       total - remaining, total, 100 - 100 * remaining / (total+1e-12),
-                      datetime.datetime.strftime(datetime.datetime.now(), '%Y-%m-%d %H:%M:%S')), flush=True)
+                      datetime.datetime.strftime(datetime.datetime.now(),
+                                                 '%Y-%m-%d %H:%M:%S')), flush=True)
         return remaining, total