Merge branch 'master' of https://github.com/datajoint/datajoint-python

Author: dimitri-yatsenko

datajoint/connection.py

@@ -147,7 +147,7 @@ def query(self, query, args=(), as_dict=False, suppress_warnings=True, reconnect
                 cur.execute(query, args)
         except (err.InterfaceError, err.OperationalError) as e:
             if is_connection_error(e) and reconnect:
-                warnings.warn("Mysql server has gone away. Reconnectting to the server.")
+                warnings.warn("Mysql server has gone away. Reconnecting to the server.")
                 self.connect()
                 if self._in_transaction:
                     self.cancel_transaction()

datajoint/erd.py

@@ -121,6 +121,17 @@ def __init__(self, source, context=None):
                     if node.startswith('`%s`' % database):
                         self.nodes_to_show.add(node)
 
+            for full_table_name in self.nodes_to_show:
+                #one entry per parent
+                parents = connection.dependencies.parents(full_table_name,True)
+                
+                # all the foreign primary keys
+                # set because multiple foreign constraints can be applied on the same local attribute
+                foreign_primary_attributes = set(attr for parent in parents.values() for attr in parent['attr_map'].keys())
+                
+                #distinguished table if table introduces atleast one primary key in the schema
+                self.nodes._nodes[full_table_name]['distinguished'] = foreign_primary_attributes < self.nodes._nodes[full_table_name]['primary_key']
+                
         @classmethod
         def from_sequence(cls, sequence):
             """
@@ -260,7 +271,7 @@ def make_dot(self):
                         '-'*30 if q.startswith('---') else q.replace('->', '&#8594;') if '->' in q else q.split(':')[0]
                         for q in description if not q.startswith('#'))
                     node.set_tooltip('&#13;'.join(description))
-                node.set_label(name)
+                node.set_label("<<u>"+name+"</u>>" if node.get('distinguished') == 'True' else name)
                 node.set_color(props['color'])
                 node.set_style('filled')
 

datajoint/table.py

@@ -170,7 +170,7 @@ def insert(self, rows, replace=False, skip_duplicates=False, ignore_extra_fields
         # prohibit direct inserts into auto-populated tables
         if not (allow_direct_insert or getattr(self, '_allow_insert', True)):  # _allow_insert is only present in AutoPopulate
             raise DataJointError(
-                'Auto-populate tables can only be inserted into from their make methods during populate calls.')
+                'Auto-populate tables can only be inserted into from their make methods during populate calls. (see allow_direct_insert)')
 
         heading = self.heading
         if inspect.isclass(rows) and issubclass(rows, QueryExpression):   # instantiate if a class