Package: bajra
BajraBajra is a simple ORM API(for MySQL and PostGreSQL)that provide helpers to manage raw SQL in Python applications.What Bajra can do?Bajra allows you to write raw SQL and forget about cursors, and it's related data structures like tuples or dicts.
Also allows you to write your query by pieces, making the whole thing more readable.Let's see a few examples!Fetching results made simplefrombajraimportBajrafrombajra.engines.postgresimportPostgreSQLEnginecater=Bajra(PostgreSQLEngine(dsn="YOUR-DATABASE-DSN"))rows=cater.fetchall("SELECT name, surname FROM test")# That command returns a RowResult you can iterateforrowinrows:print(row.name)# You can access to the data with dot notation.print(row['name'])# Also as a dict-like object.Querying with arguments. No more pain.frombajraimportBajrafrombajra.engines.postgresimportPostgreSQLEnginecater=Bajra(PostgreSQLEngine(dsn="YOUR-DATABASE-DSN"))row=cater.fetchone("SELECT name, surname FROM test WHERE name =%s",("John",))print(row.name)# Johnprint(row.surname)# Costarow=cater.fetchone("SELECT name, surname FROM test WHERE name =%(name)s",{'name':'John'})print(row.name)# Johnprint(row.surname)# Costarow=cater.fetchone("SELECT name, surname FROM test WHERE name =%(name)s",name='John')print(row.name)# Johnprint(row.surname)# CostaQuerying piece by piecefrombajraimportBajrafrombajra.engines.postgresimportPostgreSQLEnginecater=Bajra(PostgreSQLEngine(dsn="YOUR-DATABASE-DSN"))query=cater.query("SELECT * FROM test")query.append("WHERE name =%(name)s",name="John")row=cater.fetchone(query)row.name# Johnrow.surname# CostaExecute all the things.frombajraimportBajrafrombajra.engines.postgresimportPostgreSQLEnginecater=Bajra(PostgreSQLEngine(dsn="YOUR-DATABASE-DSN"))query=cater.query("INSERT INTO test (name, surname) VALUES")query.append("(%(name)s,%(surname)s)",name="Thomas",surname="Jefferson")result=cater.execute(query)print(result.lastrowid)# Last Row ID of the last query. (If the engine supports it.)print(result.rowcount)# How many rows retrieve the last query. (If the engine supports it.)print(result.rownumber)# Number of rows affected by the last query. (If engine supports it.)TransactionsfrombajraimportBajrafrombajra.engines.postgresimportPostgreSQLEnginecater=Bajra(PostgreSQLEngine(dsn="YOUR-DATABASE-DSN"))cater.begin()query=cater.query("INSERT INTO test (name, surname) VALUES")query.append("(%(name)s,%(surname)s)",name="Marie-Cole",surname="Ross")result=cater.execute(query)print(result.lastrowid)# Last Row ID of the last query. (If the engine supports it.)print(result.rowcount)# How many rows retrieve the last query. (If the engine supports it.)print(result.rownumber)# Number of rows affected by the last query. (If engine supports it.)cater.commit()Transactions within a context managerfrombajraimportBajrafrombajra.engines.postgresimportPostgreSQLEnginedefcallback_on_exception(_cater,exc_type,exc_value,traceback):print(exc_type)# <class 'psycopg2.ProgrammingError'>cater=Bajra(PostgreSQLEngine(dsn="YOUR-DATABASE-DSN"))withcater.transaction(rollback_on_exc=True,callback_exc=callback_on_exception):cater.execute("INSERT INTO test (name, surname) VALUES%s,%s",("Augustus","Zuma"))row=cater.fetchone("SELECT * FROM test WHERE name=%sAND surname=%s",("Augustus","Zuma"))print(row)# None, Bajra has perfomed a rollback due to a exception.Collaborators Welcome!If you have an idea you want to contribute in Bajra, clone the repo and raise a pull request with your feature!