`{}` is not supported in attribute comments

[shenshan]

Bug Report

Description

{} is not supported in attribute comments

Error

@schema
class Session(dj.Manual):
    definition = """
    -> Subject
    session_start_time: datetime
    ---
    session_dir=''  : varchar(32) # {session_directory}
    """

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-21-23a07d7508ab> in <module>
      1 @schema
----> 2 class Session(dj.Manual):
      3     definition = """
      4     -> Subject
      5     session_start_time: datetime

~/anaconda3/lib/python3.7/site-packages/datajoint/schemas.py in __call__(self, cls, context)
    145             raise DataJointError('The schema decorator should not be applied to Part relations')
    146         if self.is_activated():
--> 147             self._decorate_master(cls, context)
    148         else:
    149             self.declare_list.append((cls, context))

~/anaconda3/lib/python3.7/site-packages/datajoint/schemas.py in _decorate_master(self, cls, context)
    155         :param context: the class' declaration context
    156         """
--> 157         self._decorate_table(cls, context=dict(context, self=cls, **{cls.__name__: cls}))
    158         # Process part tables
    159         for part in ordered_dir(cls):

~/anaconda3/lib/python3.7/site-packages/datajoint/schemas.py in _decorate_table(self, table_class, context, assert_declared)
    186             if not self.create_tables or assert_declared:
    187                 raise DataJointError('Table `%s` not declared' % instance.table_name)
--> 188             instance.declare(context)
    189         is_declared = is_declared or instance.is_declared
    190 

~/anaconda3/lib/python3.7/site-packages/datajoint/table.py in declare(self, context)
     78                                  'e.g. from inside a populate/make call')
     79         sql, external_stores = declare(self.full_table_name, self.definition, context)
---> 80         sql = sql.format(database=self.database)
     81         try:
     82             # declare all external tables before declaring main table

KeyError: 'session_directory'

[dimitri-yatsenko]

What's the error message?

[shenshan]

@dimitri-yatsenko I updated the error above.

[dimitri-yatsenko]

Makes sense. DataJoint should escape the curly brackets before incorporating the comment in a formatted string. Easy fix.