class ObjectWithDefaultProps:
server_id = db.Column(db.Integer, primary_key=True, autoincrement=True)
deleted = db.Column(db.Boolean, nullable=False, default=False)
date_modified = db.Column(db.DateTime,
default=datetime.utcnow,
onupdate=datetime.utcnow)
date_added = db.Column(db.DateTime, default=datetime.utcnow)
class Message(DBModel, ObjectWithDefaultProps):
body = db.Column(db.String(250), nullable=False)
receiver_id = db.Column(db.Integer, db.ForeignKey("user.server_id"))
sender_id = db.Column(db.Integer, db.ForeignKey("user.server_id"))
receiver = db.relationship("User", foreign_keys=receiver_id, lazy="joined")
sender = db.relationship("User", foreign_keys=sender_id, lazy="joined")
class User(DBModel, ObjectWithDefaultProps, ObjectWithLocation, ObjectWithContactDetails):
email = db.Column(db.String(100), unique=True, nullable=False)
firebase_uid = db.Column(db.String(100), unique=True, nullable=False)
firstname = db.Column(db.String(100), nullable=False)
lastname = db.Column(db.String(100), nullable=False)
profile_image_url = db.Column(db.String(100), nullable=False)
date_of_birth = db.Column(db.DateTime, nullable=False)
bio = db.Column(db.String(300))
phone = db.Column(db.String(10), unique=True, nullable=False)
main_preference_mode = db.Column(db.Integer, nullable=False) #This is an int; in the manager class we need to check (not implemented for now) if it conforms to our enum PreferenceMode
class Advertisement(DBModel, ObjectWithDefaultProps, ObjectWithLocation, ObjectWithContactDetails):
title = db.Column(db.String(20), nullable=False)
details = db.Column(db.String(300), nullable=False)
deadline = db.Column(db.DateTime)
finished = db.Column(db.Boolean, nullable=False, default=False)
author_id = db.Column(db.Integer, db.ForeignKey("user.server_id"))
author = db.relationship("User", foreign_keys=author_id, lazy="joined", backref="advertisements")
categories = db.relationship(
"Category",
secondary=category_association_table
)
@hybrid_method
def distance(self, my_coordinates):
lon1 = db.func.substr(self.coordinates, db.func.instr(self.coordinates, ',') + 1)
lat1 = db.func.substr(self.coordinates, 0, db.func.instr(self.coordinates, ','))
lat2 = db.func.substr(my_coordinates, 0, db.func.instr(my_coordinates, ','))
lon2 = db.func.substr(my_coordinates, db.func.instr(my_coordinates, ',') + 1)
earth_radius_km = 6371.009
lon1 = cast(lon1, sqlalchemy.Float)
lon2 = cast(lon2, sqlalchemy.Float)
lat1 = cast(lat1, sqlalchemy.Float)
lat2 = cast(lat2, sqlalchemy.Float)
km_per_deg_lat = db.literal(2 * math.pi * earth_radius_km / 360.0)
km_per_deg_lon = km_per_deg_lat * db.func.cos(
db.func.radians(
lat1
)
)
lat_calc_col = db.func.power(km_per_deg_lat * (lat1 - lat2), 2)
lon_calc_col = db.func.power(km_per_deg_lon * (lon1 - lon2), 2)
calc_col = lat_calc_col + lon_calc_col
return db.func.round(db.func.sqrt(calc_col), 2)
class ObjectWithContactDetails:
phone = db.Column(db.String(10), unique=False, nullable=False)
email = db.Column(db.String(100), unique=False, nullable=False)
class ObjectWithLocation:
zip_code = db.Column(db.String(6), nullable=False)
coordinates = db.Column(db.String(100), nullable=False)
class Category(DBModel, ObjectWithDefaultProps):
name = db.Column(db.String(20), unique=True, nullable=False)
color = db.Column(db.String(20), unique=True, nullable=False)
email = db.Column(db.String(100), unique=True, nullable=False)
firebase_uid = db.Column(db.String(100), unique=True, nullable=False)
firstname = db.Column(db.String(100), nullable=False)
lastname = db.Column(db.String(100), nullable=False)
profile_image_url = db.Column(db.String(100), nullable=False)
date_of_birth = db.Column(db.DateTime, nullable=False)
bio = db.Column(db.String(300))
phone = db.Column(db.String(10), unique=True, nullable=False)
main_preference_mode = db.Column(db.Integer, nullable=False) #This is an int; in the manager class we need to check (not implemented for now) if it conforms to our enum PreferenceMode
category_association_table = db.Table(
'category_association_table', db.metadata,
db.Column(
'category_id',
db.Integer,
db.ForeignKey(
'category.server_id'
)
),
db.Column(
'advertisement_id',
db.Integer,
db.ForeignKey(
'advertisement.server_id'
)
)
)
class Advertisement(DBModel, ObjectWithDefaultProps, ObjectWithLocation, ObjectWithContactDetails):