Expand tables to include other NWB items (e.g., pharmacology, slices)

[CBroz1]

• NWB items discussed as part of element-lab PR 11 could be included in element-session.
• Viruses, in particular, could be fully specified by a separate schema, example here.

#example table definition
pharmacology = ''  : varchar(2048) # Drugs used, how/when administered
slices=''          : varchar(2048) # If slicing, preparation thickness, orientation, temperature, and bath solution
surgery=''         : varchar(2048) # Description of surger(y/ies), who performed, when relative to other events
->virus.Viruses='' : varchar(2048) # ID, source, date made, injection loc, volume

# example export feature
def SessionGeneral_to_nwb_dict(session_key=None):
    """
    Generate a dictionary object containing relevant project information
        (e.g., experimental description, related publications, etc.).
    :param session_key: Key specifying one entry in element_session.Session
    :return: dictionary with NWB parameters
    """
    if session_key is not None:
        sess_info = (session.Session & session_key).fetch1()
        return dict(
            pharmacology=sess_info.get('pharmacology', ''),
            slices=sess_info.get('slices', ''),
            source_script=sess_info.get('repositoryurl', ''),
            surgery=sess_info.get('surgery', ''),
            virus=sess_info.get('virus', '') # needs more specification
        )
    else: return {}