diff options
Diffstat (limited to 'gn3/db')
-rw-r--r-- | gn3/db/__init__.py | 70 | ||||
-rw-r--r-- | gn3/db/phenotypes.py | 64 |
2 files changed, 72 insertions, 62 deletions
diff --git a/gn3/db/__init__.py b/gn3/db/__init__.py index e69de29..fae4d29 100644 --- a/gn3/db/__init__.py +++ b/gn3/db/__init__.py @@ -0,0 +1,70 @@ +# pylint: disable=[R0902, R0903] +"""Module that exposes common db operations""" +from typing import Optional, Dict, Any +from dataclasses import dataclass, asdict, astuple +from typing_extensions import Protocol +from MySQLdb import escape_string + +from gn3.db.phenotypes import Phenotype +from gn3.db.phenotypes import PublishXRef +from gn3.db.phenotypes import Publication + +from gn3.db.phenotypes import phenotype_mapping +from gn3.db.phenotypes import publish_x_ref_mapping +from gn3.db.phenotypes import publication_mapping + +TABLEMAP = { + "Phenotype": phenotype_mapping, + "PublishXRef": publish_x_ref_mapping, + "Publication": publication_mapping, +} + +DATACLASSMAP = { + "Phenotype": Phenotype, + "PublishXRef": PublishXRef, + "Publication": Publication, +} + + +class Dataclass(Protocol): + """Type Definition for a Dataclass""" + __dataclass_fields__: Dict + + +def update(conn: Any, + table: str, + data: Dataclass, + where: Dataclass) -> Optional[int]: + """Run an UPDATE on a table""" + if not any(astuple(data) + astuple(where)): + return None + sql = f"UPDATE {table} SET " + sql += ", ".join(f"{TABLEMAP[table].get(k)} " + f"= '{escape_string(str(v)).decode('utf-8')}'" for + k, v in asdict(data).items() + if v is not None and k in TABLEMAP[table]) + sql += " WHERE " + sql += "AND ".join(f"{TABLEMAP[table].get(k)} = " + f"'{escape_string(str(v)).decode('utf-8')}'" for + k, v in asdict(where).items() + if v is not None and k in TABLEMAP[table]) + with conn.cursor() as cursor: + cursor.execute(sql) + return cursor.rowcount + + +def fetchone(conn: Any, + table: str, + where: Dataclass) -> Optional[Dataclass]: + """Run a SELECT on a table. Returns only one result!""" + if not any(astuple(where)): + return None + sql = f"SELECT * FROM {table} " + sql += "WHERE " + sql += "AND ".join(f"{TABLEMAP[table].get(k)} = " + f"'{escape_string(str(v)).decode('utf-8')}'" for + k, v in asdict(where).items() + if v is not None and k in TABLEMAP[table]) + with conn.cursor() as cursor: + cursor.execute(sql) + return DATACLASSMAP[table](*cursor.fetchone()) diff --git a/gn3/db/phenotypes.py b/gn3/db/phenotypes.py index ee523ad..2b93c85 100644 --- a/gn3/db/phenotypes.py +++ b/gn3/db/phenotypes.py @@ -1,17 +1,9 @@ # pylint: disable=[R0902, R0903] """This contains all the necessary functions that access the phenotypes from the db""" -from dataclasses import dataclass, asdict, astuple +from dataclasses import dataclass -from typing import Any, Dict, Optional -from MySQLdb import escape_string - -from typing_extensions import Protocol - - -class Dataclass(Protocol): - """Type Definition for a Dataclass""" - __dataclass_fields__: Dict +from typing import Optional @dataclass(frozen=True) @@ -107,55 +99,3 @@ publication_mapping = { "month": "Month", "year": "Year", } - - -TABLEMAP = { - "Phenotype": phenotype_mapping, - "PublishXRef": publish_x_ref_mapping, - "Publication": publication_mapping, -} - -DATACLASSMAP = { - "Phenotype": Phenotype, - "PublishXRef": PublishXRef, - "Publication": Publication, -} - - -def update(conn: Any, - table: str, - data: Dataclass, - where: Dataclass) -> Optional[int]: - """Run an UPDATE on a table""" - if not any(astuple(data) + astuple(where)): - return None - sql = f"UPDATE {table} SET " - sql += ", ".join(f"{TABLEMAP[table].get(k)} " - f"= '{escape_string(str(v)).decode('utf-8')}'" for - k, v in asdict(data).items() - if v is not None and k in TABLEMAP[table]) - sql += " WHERE " - sql += "AND ".join(f"{TABLEMAP[table].get(k)} = " - f"'{escape_string(str(v)).decode('utf-8')}'" for - k, v in asdict(where).items() - if v is not None and k in TABLEMAP[table]) - with conn.cursor() as cursor: - cursor.execute(sql) - return cursor.rowcount - - -def fetchone(conn: Any, - table: str, - where: Dataclass) -> Optional[Dataclass]: - """Run a SELECT on a table. Returns only one result!""" - if not any(astuple(where)): - return None - sql = f"SELECT * FROM {table} " - sql += "WHERE " - sql += "AND ".join(f"{TABLEMAP[table].get(k)} = " - f"'{escape_string(str(v)).decode('utf-8')}'" for - k, v in asdict(where).items() - if v is not None and k in TABLEMAP[table]) - with conn.cursor() as cursor: - cursor.execute(sql) - return DATACLASSMAP[table](*cursor.fetchone()) |