class Library(db.Model):
id = db.Column(db.Integer, primary_key=True)
owner_id = db.Column(db.Integer,
db.ForeignKey('user.id'),
nullable=False,
unique=True)
books = db.relationship('BCopy', backref='part', lazy=True)
class User(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(20), unique=True, nullable=False)
email = db.Column(db.String(120), unique=True, nullable=False)
image_file = db.Column(db.String(20),
nullable=False,
default='default.jpg')
password = db.Column(db.String(60), nullable=False)
active = db.Column(db.Boolean, nullable=False, default=False)
pages = db.Column(db.Integer, nullable=False, default=0)
days = db.Column(db.Integer, nullable=False, default=0)
Library = db.relationship('Library',
backref='owner',
lazy=True,
uselist=False)
Libraries = db.relationship('Library',
secondary=membership,
backref='member',
lazy=True)
Books = db.relationship('BCopy', backref='owner', lazy=True)
def get_token(self, expires_sec=1800):
s = Serializer(current_app.config['SECRET_KEY'], expires_sec)
return s.dumps({'user_id': self.id}).decode('utf-8')
@staticmethod
def verify_token(token):
s = Serializer(current_app.config['SECRET_KEY'])
try:
user_id = s.loads(token)['user_id']
except:
return None
return User.query.get(user_id)
class BCopy(db.Model):
id = db.Column(db.Integer, primary_key=True)
status = db.Column(db.String(20), nullable=False, default='New')
lend = db.Column(db.Boolean, nullable=False, default=False)
guest = db.Column(db.Boolean, nullable=False, default=False)
date = db.Column(db.DateTime, nullable=False, default=datetime.utcnow())
owner_id = db.Column(db.Integer, db.ForeignKey('user.id'), nullable=False)
lib_id = db.Column(db.Integer, db.ForeignKey('library.id'), nullable=False)
book_id = db.Column(db.Integer, db.ForeignKey('book.id'), nullable=False)
lend_id = db.Column(db.Integer, nullable=True)
History = db.relationship('History', backref='book', lazy=True)
class History(db.Model):
id = db.Column(db.Integer, primary_key=True)
date = db.Column(db.DateTime, nullable=False)
action = db.Column(db.String(20), nullable=False)
book_id = db.Column(db.Integer, db.ForeignKey('b_copy.id'), nullable=False)
username = db.Column(db.String(20), nullable=False)
class Book(db.Model):
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(100), nullable=False, unique=True)
author = db.Column(db.String(100), nullable=False)
pages = db.Column(db.Integer, nullable=False)
Copies = db.relationship('BCopy', backref='original', lazy=True)
from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
from datetime import datetime
from flask import current_app
from flask_lib import db, login_manager
from flask_login import UserMixin
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
membership = db.Table(
'membership', db.Model.metadata,
db.Column('member_id', db.Integer, db.ForeignKey('user.id')),
db.Column('lib_id', db.Integer, db.ForeignKey('library.id')))
class User(db.Model, UserMixin):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(20), unique=True, nullable=False)
email = db.Column(db.String(120), unique=True, nullable=False)
image_file = db.Column(db.String(20),
nullable=False,
default='default.jpg')
password = db.Column(db.String(60), nullable=False)
active = db.Column(db.Boolean, nullable=False, default=False)
pages = db.Column(db.Integer, nullable=False, default=0)
days = db.Column(db.Integer, nullable=False, default=0)
Library = db.relationship('Library',
backref='owner',