fix #902: re-load dependencies after table declaration.

Author: dimitri-yatsenko

datajoint/autopopulate.py

@@ -39,8 +39,8 @@ def _rename_attributes(table, props):
         if self._key_source is None:
             parents = self.target.parents(primary=True, as_objects=True, foreign_key_info=True)
             if not parents:
-                raise DataJointError(
-                    'A relation must have primary dependencies for auto-populate to work')
+                raise DataJointError('A table must have dependencies '
+                                     'from its primary key for auto-populate to work')
             self._key_source = _rename_attributes(*parents[0])
             for q in parents[1:]:
                 self._key_source *= _rename_attributes(*q)

datajoint/schemas.py

@@ -23,7 +23,6 @@ def ordered_dir(class_):
     """
     List (most) attributes of the class including inherited ones, similar to `dir` build-in function,
     but respects order of attribute declaration as much as possible.
-    This becomes unnecessary in Python 3.6+ as dicts became ordered.
     :param class_: class to list members for
     :return: a list of attributes declared in class_ and its superclasses
     """
@@ -186,6 +185,7 @@ def _decorate_table(self, table_class, context, assert_declared=False):
             if not self.create_tables or assert_declared:
                 raise DataJointError('Table `%s` not declared' % instance.table_name)
             instance.declare(context)
+            self.connection.dependencies.clear()
         is_declared = is_declared or instance.is_declared
 
         # add table definition to the doc string

tests/test_autopopulate.py

@@ -86,6 +86,7 @@ class Image(dj.Imported):
 
             def make(self, key):
                 self.insert1(dict(key, image_data=dict()))
+
         Image.populate()
 
         @schema
@@ -98,4 +99,5 @@ class Crop(dj.Computed):
 
             def make(self, key):
                 self.insert1(dict(key, crop_image=dict()))
+
         Crop.populate()

tests/test_erd.py

@@ -26,6 +26,7 @@ def test_decorator():
     @staticmethod
     def test_dependencies():
         deps = schema.connection.dependencies
+        deps.load()
         assert_true(all(cls.full_table_name in deps for cls in (A, B, B.C, D, E, E.F, L)))
         assert_true(set(A().children()) == set([B.full_table_name, D.full_table_name]))
         assert_true(set(D().parents(primary=True)) == set([A.full_table_name]))

tests/test_schema_keywords.py

@@ -3,7 +3,7 @@
 from nose.tools import assert_true
 
 
-schema = dj.Schema(PREFIX + '_keywords', locals(), connection=dj.conn(**CONN_INFO))
+schema = dj.Schema(PREFIX + '_keywords', connection=dj.conn(**CONN_INFO))
 
 
 @schema