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"""Handle db interactions for platforms."""
from typing import Optional
import MySQLdb as mdb
from MySQLdb.cursors import DictCursor
def platforms_by_species(
conn: mdb.Connection, speciesid: int) -> tuple[dict, ...]:
"""Retrieve platforms by the species"""
with conn.cursor(cursorclass=DictCursor) as cursor:
cursor.execute("SELECT * FROM GeneChip WHERE SpeciesId=%s "
"ORDER BY GeneChipName ASC",
(speciesid,))
return tuple(dict(row) for row in cursor.fetchall())
def platform_by_id(conn: mdb.Connection, platformid: int) -> Optional[dict]:
"""Retrieve a platform by its ID"""
with conn.cursor(cursorclass=DictCursor) as cursor:
cursor.execute("SELECT * FROM GeneChip WHERE Id=%s",
(platformid,))
result = cursor.fetchone()
if bool(result):
return dict(result)
return None
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