-
Notifications
You must be signed in to change notification settings - Fork 0
/
create.py
62 lines (51 loc) · 1.72 KB
/
create.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
# Script para crear las tablas de la aplicación en la base de datos remota PostgreSQL.
import os
from dotenv import load_dotenv
from sqlalchemy import create_engine, text
from sqlalchemy.orm import scoped_session, sessionmaker
# Carga de las variables de entorno.
load_dotenv()
engine = create_engine(os.getenv("DATABASE_URL"))
db = scoped_session(sessionmaker(bind=engine))
# Creación de las tablas.
def main():
query = text("""
CREATE TABLE IF NOT EXISTS books (
id INTEGER PRIMARY KEY AUTOINCREMENT,
isbn TEXT NOT NULL,
title TEXT NOT NULL,
author TEXT NOT NULL,
year INTEGER NOT NULL
)
""")
db.execute(query)
db.commit()
query = text("""
CREATE TABLE IF NOT EXISTS users (
id INTEGER PRIMARY KEY AUTOINCREMENT,
username TEXT NOT NULL,
name TEXT NOT NULL,
lastname TEXT NOT NULL,
password_hash TEXT NOT NULL,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
image TEXT
)
""")
db.execute(query)
db.commit()
query = text("""
CREATE TABLE IF NOT EXISTS reviews (
id INTEGER PRIMARY KEY AUTOINCREMENT,
user_id INTEGER REFERENCES users(id),
book_id INTEGER REFERENCES books(id),
rating INTEGER NOT NULL CHECK (rating >= 1 AND rating <= 5),
review_text TEXT,
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
CONSTRAINT unique_user_book_review UNIQUE (user_id, book_id)
)
""")
db.execute(query)
db.commit()
print("La creación de tablas se realizó de forma exitosa.")
if __name__ == "__main__":
main()