buddhas hand

buddhas-mano

El controlador de base de datos predeterminado para Tangerine

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Esta es una hoja de ideas sobre cómo implementar Buddhas Hand

Algunas partes de este documento pueden no tener pleno sentido todavía, ya que todavía lo estoy resolviendo

Hasta ahora, esto es lo que puedes hacer con la mano de Buda:

 import psycopg2
from buddhas_hand_5 import Database , Table
from user_model import User

def is_not_email ( value ):
    if "@" in value :
        raise ValueError ( "Value must not be an email address" )

def name_length_check ( value ):
    if len ( value ) < 3 :
        raise ValueError ( "Name must be at least 3 characters long" )

def is_string ( value ):
    if not isinstance ( value , str ):
        raise ValueError ( "Value must be a string" )


def main ():
    # Set up the database connection
    connection_string = "postgresql://postgres:C4melz!!@localhost:5432/local_development"
    db = Database ( connection_string )
    User . set_database ( db )

    # Create schema and register columns for the User model
    db . create_schema ( "buddhas_hand" )


    User . register_columns ([
        {
            "name" : "name" ,
            "type" : "TEXT" ,
            "validations" : [ is_not_email , name_length_check , is_string ],
            "nullable" : False ,
        },
        {
            "name" : "email" ,
            "type" : "TEXT" ,
            "validations" : [],
            "nullable" : False ,
        },
        {
            "name" : "age" ,
            "type" : "INTEGER" ,
            "validations" : [],
            "nullable" : False ,
        },
    ])
    users_table = Table . from_model ( User )
    db . create_table ( users_table )


    # Create the users table


    user1 = User ( name = "John Doe" , email = "[email protected]" , age = 30 )
    user2 = User ( name = "Jane Smith" , email = "[email protected]" , age = 28 )

    user1 . insert ()
    user2 . insert ()

    users = User . find_all ()
    print ( "Inserted users:" )
    for user in users :
        print ( user . __dict__ )

    user1 . name = "John Updated"
    user1 . age = 31
    user2 . name = "Jane Updated"
    user2 . age = 29

    user1 . update ()
    user2 . update ()

    users = User . find_all ()
    print ( "Updated users:" )
    for user in users :
        print ( user . __dict__ )

    user1 . delete ()
    user2 . delete ()

    db . drop_table ( users_table . name , users_table . schema_name )
    db . drop_schema ( "buddhas_hand" )

if __name__ == "__main__" :
    main ()

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