A simple example

We have used one of the available databases example from PonyORM, the universities. To run de example, you should go to the console and do:

$ python

Then import the example and using pw.search("smith") you will be able to perform a simple search over the entire database.

Here is the source code of the example file.

from datetime import date
from pony.orm import *
from ponywhoosh import PonyWhoosh
pw = PonyWhoosh()

# configurations
pw.search_string_min_len = 1
pw.indexes_path = 'ponyindexes'
pw.writer_timeout = 2

db = Database()

@pw.register_model('number', 'name')
class Department(db.Entity):
    number = PrimaryKey(int, auto=True)
    name = Required(str, unique=True)
    groups = Set("Group")
    courses = Set("Course")


@pw.register_model('number', 'major')
class Group(db.Entity):
    number = PrimaryKey(int)
    major = Required(str)
    dept = Required("Department")
    students = Set("Student")


@pw.register_model('name', 'semester',  'lect_hours', 'lab_hours', 'credits')
class Course(db.Entity):
    name = Required(str)
    semester = Required(int)
    lect_hours = Required(int)
    lab_hours = Required(int)
    credits = Required(int)
    dept = Required(Department)
    students = Set("Student")
    PrimaryKey(name, semester)


@pw.register_model('name', 'tel', 'gpa')
class Student(db.Entity):
    id = PrimaryKey(int, auto=True)
    name = Required(str)
    dob = Required(date)
    tel = Optional(str)
    picture = Optional(buffer, lazy=True)
    gpa = Required(float, default=0)
    group = Required(Group)
    courses = Set(Course)

db.bind('sqlite', 'example.sqlite', create_db=True)

db.generate_mapping(create_tables=True)



@db_session
def populate_database():
    if select(s for s in Student).count() > 0:
        return

    d1 = Department(name="Department of Computer        Science")
    d2 = Department(name="Department of         Mathematical Sciences")
    d3 = Department(name="Department of Applied         Physics")

    c1 = Course(name="Web Design", semester=1,  dept=d1,
                lect_hours=30, lab_hours=30,    credits=3)
    c2 = Course(name="Data Structures and       Algorithms", semester=3, dept=d1,
                lect_hours=40, lab_hours=20,    credits=4)

    c3 = Course(name="Linear Algebra", semester=1,      dept=d2,
                lect_hours=30, lab_hours=30,    credits=4)
    c4 = Course(name="Statistical Methods",     semester=2, dept=d2,
                lect_hours=50, lab_hours=25,    credits=5)

    c5 = Course(name="Thermodynamics", semester=2,      dept=d3,
                lect_hours=25, lab_hours=40,    credits=4)
    c6 = Course(name="Quantum Mechanics",       semester=3, dept=d3,
                lect_hours=40, lab_hours=30,    credits=5)

    g101 = Group(number=101, major='B.E. in     Computer Engineering', dept=d1)
    g102 = Group(number=102, major='B.S./M.S. in        Computer Science', dept=d1)
    g103 = Group(number=103, major='B.S. in     Applied Mathematics and Statistics', dept=d2)
    g104 = Group(number=104, major='B.S./M.S. in        Pure Mathematics', dept=d2)
    g105 = Group(number=105, major='B.E in      Electronics', dept=d3)
    g106 = Group(number=106, major='B.S./M.S. in        Nuclear Engineering', dept=d3)

    s1 = Student(name='John Smith', dob=date(1991,      3, 20), tel='123-456', gpa=3, group=g101,
                 courses=[c1, c2, c4, c6])
    s2 = Student(name='Matthew Reed',   dob=date(1990, 11, 26), gpa=3.5, group=g101,
                 courses=[c1, c3, c4, c5])
    s3 = Student(name='Chuan Qin', dob=date(1989,       2, 5), gpa=4, group=g101,
                 courses=[c3, c5, c6])
    s4 = Student(name='Rebecca Lawson',         dob=date(1990, 4, 18), tel='234-567', gpa=3.3,  group=g102,
                 courses=[c1, c4, c5, c6])
    s5 = Student(name='Maria Ionescu',  dob=date(1991, 4, 23), gpa=3.9, group=g102,
                 courses=[c1, c2, c4, c6])
    s6 = Student(name='Oliver Blakey',  dob=date(1990, 9, 8), gpa=3.1, group=g102,
                 courses=[c1, c2, c5])
    s7 = Student(name='Jing Xia', dob=date(1988,        12, 30), gpa=3.2, group=g102,
                 courses=[c1, c3, c5, c6])
    commit()


if __name__ == "__main__":
    populate_database()