<s> from datetime import datetime <EOL> from dateutil import parser as datetime_parser <EOL> from dateutil . tz import tzutc <EOL> from werkzeug . security import generate_password_hash , check_password_hash <EOL> from itsdangerous import TimedJSONWebSignatureSerializer as Serializer <EOL> from flask import url_for , current_app <EOL> from . import db <EOL> from . exceptions import ValidationError <EOL> from . utils import split_url <EOL> class User ( db . Model ) : <EOL> __tablename__ = '<STR_LIT>' <EOL> id = db . Column ( db . Integer , primary_key = True ) <EOL> username = db . Column ( db . String ( <NUM_LIT:64> ) , index = True ) <EOL> password_hash = db . Column ( db . String ( <NUM_LIT> ) ) <EOL> def set_password ( self , password ) : <EOL> self . password_hash = generate_password_hash ( password ) <EOL> def verify_password ( self , password ) : <EOL> return check_password_hash ( self . password_hash , password ) <EOL> def generate_auth_token ( self , expires_in = <NUM_LIT> ) : <EOL> s = Serializer ( current_app . config [ '<STR_LIT>' ] , expires_in = expires_in ) <EOL> return s . dumps ( { '<STR_LIT:id>' : self . id } ) . decode ( '<STR_LIT:utf-8>' ) <EOL> @ staticmethod <EOL> def verify_auth_token ( token ) : <EOL> s = Serializer ( current_app . config [ '<STR_LIT>' ] ) <EOL> try : <EOL> data = s . loads ( token ) <EOL> except : <EOL> return None <EOL> return User . query . get ( data [ '<STR_LIT:id>' ] ) <EOL> class Customer ( db . Model ) : <EOL> __tablename__ = '<STR_LIT>' <EOL> id = db . Column ( db . Integer , primary_key = True ) <EOL> name = db . Column ( db . String ( <NUM_LIT:64> ) , index = True ) <EOL> orders = db . relationship ( '<STR_LIT>' , backref = '<STR_LIT>' , lazy = '<STR_LIT>' ) <EOL> def get_url ( self ) : <EOL> return url_for ( '<STR_LIT>' , id = self . id , _external = True ) <EOL> def export_data ( self ) : <EOL> return { <EOL> '<STR_LIT>' : self . get_url ( ) , <EOL> '<STR_LIT:name>' : self . name , <EOL> '<STR_LIT>' : url_for ( '<STR_LIT>' , id = self . id , <EOL> _external = True ) <EOL> } <EOL> def import_data ( self , data ) : <EOL> try : <EOL> self . name = data [ '<STR_LIT:name>' ] <EOL> except KeyError as e : <EOL> raise ValidationError ( '<STR_LIT>' + e . args [ <NUM_LIT:0> ] ) <EOL> return self <EOL> class Product ( db . Model ) : <EOL> __tablename__ = '<STR_LIT>' <EOL> id = db . Column ( db . Integer , primary_key = True ) <EOL> name = db . Column ( db . String ( <NUM_LIT:64> ) , index = True ) <EOL> items = db . relationship ( '<STR_LIT>' , backref = '<STR_LIT>' , lazy = '<STR_LIT>' ) <EOL> def get_url ( self ) : <EOL> return url_for ( '<STR_LIT>' , id = self . id , _external = True ) <EOL> def export_data ( self ) : <EOL> return { <EOL> '<STR_LIT>' : self . get_url ( ) , <EOL> '<STR_LIT:name>' : self . name <EOL> } <EOL> def import_data ( self , data ) : <EOL> try : <EOL> self . name = data [ '<STR_LIT:name>' ] <EOL> except KeyError as e : <EOL> raise ValidationError ( '<STR_LIT>' + e . args [ <NUM_LIT:0> ] ) <EOL> return self <EOL> class Order ( db . Model ) : <EOL> __tablename__ = '<STR_LIT>' <EOL> id = db . Column ( db . Integer , primary_key = True ) <EOL> customer_id = db . Column ( db . Integer , db . ForeignKey ( '<STR_LIT>' ) , <EOL> index = True ) <EOL> date = db . Column ( db . DateTime , default = datetime . now ) <EOL> items = db . relationship ( '<STR_LIT>' , backref = '<STR_LIT>' , lazy = '<STR_LIT>' , <EOL> cascade = '<STR_LIT>' ) <EOL> def get_url ( self ) : <EOL> return url_for ( '<STR_LIT>' , id = self . id , _external = True ) <EOL> def export_data ( self ) : <EOL> return { <EOL> '<STR_LIT>' : self . get_url ( ) , <EOL> '<STR_LIT>' : self . customer . get_url ( ) , <EOL> '<STR_LIT:date>' : self . date . isoformat ( ) + '<STR_LIT>' , <EOL> '<STR_LIT>' : url_for ( '<STR_LIT>' , id = self . id , <EOL> _external = True ) <EOL> } <EOL> def import_data ( self , data ) : <EOL> try : <EOL> self . date = datetime_parser . parse ( data [ '<STR_LIT:date>' ] ) . astimezone ( <EOL> tzutc ( ) ) . replace ( tzinfo = None ) <EOL> except KeyError as e : <EOL> raise ValidationError ( '<STR_LIT>' + e . args [ <NUM_LIT:0> ] ) <EOL> return self <EOL> class Item ( db . Model ) : <EOL> __tablename__ = '<STR_LIT>' <EOL> id = db . Column ( db . Integer , primary_key = True ) <EOL> order_id = db . Column ( db . Integer , db . ForeignKey ( '<STR_LIT>' ) , index = True ) <EOL> product_id = db . Column ( db . Integer , db . ForeignKey ( '<STR_LIT>' ) , <EOL> index = True ) <EOL> quantity = db . Column ( db . Integer ) <EOL> def get_url ( self ) : <EOL> return url_for ( '<STR_LIT>' , id = self . id , _external = True ) <EOL> def export_data ( self ) : <EOL> return { <EOL> '<STR_LIT>' : self . get_url ( ) , <EOL> '<STR_LIT>' : self . order . get_url ( ) , <EOL> '<STR_LIT>' : self . product . get_url ( ) , <EOL> '<STR_LIT>' : self . quantity <EOL> } <EOL> def import_data ( self , data ) : <EOL> try : <EOL> endpoint , args = split_url ( data [ '<STR_LIT>' ] ) <EOL> self . quantity = int ( data [ '<STR_LIT>' ] ) <EOL> except KeyError as e : <EOL> raise ValidationError ( '<STR_LIT>' + e . args [ <NUM_LIT:0> ] ) <EOL> if endpoint != '<STR_LIT>' or not '<STR_LIT:id>' in args : <EOL> raise ValidationError ( '<STR_LIT>' + <EOL> data [ '<STR_LIT>' ] ) <EOL> self . product = Product . query . get ( args [ '<STR_LIT:id>' ] ) <EOL> if self . product is None : <EOL> raise ValidationError ( '<STR_LIT>' + <EOL> data [ '<STR_LIT>' ] ) <EOL> return self </s>
