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app.py
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app.py
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import os
from datetime import datetime
import pandas as pd
from flask import Flask, render_template
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.orm import joinedload
app = Flask(__name__)
app.config["SQLALCHEMY_DATABASE_URI"] = "postgresql://user:password@db/dbname"
db = SQLAlchemy(app)
class Article(db.Model):
__tablename__ = "articles"
id = db.Column(db.Integer, primary_key=True)
title = db.Column(db.String(80), nullable=False)
author = db.Column(db.String(100), nullable=False)
content = db.Column(db.Text, nullable=False)
date_posted = db.Column(db.DateTime, nullable=False, default=datetime.utcnow)
stock_data = db.relationship("StockData", backref="article", lazy=True)
class StockData(db.Model):
__tablename__ = "stock_data"
id = db.Column(db.Integer, primary_key=True)
date = db.Column(db.DateTime, nullable=False)
ticker = db.Column(db.String(20), nullable=False)
value = db.Column(db.Float, nullable=False)
article_id = db.Column(db.Integer, db.ForeignKey("articles.id"), nullable=False)
@app.route("/article/<article_id>", methods=["GET"])
def article(article_id):
article = Article.query.options(db.joinedload(Article.stock_data)).get(article_id)
stock_data_list = [
pd.DataFrame(
[
{
"Date": stock_data.date.strftime("%Y-%m-%d"),
"Ticker": stock_data.ticker,
"Value": stock_data.value,
}
]
)
for stock_data in article.stock_data
]
df = pd.concat(stock_data_list)
df_pivot = df.pivot(index="Ticker", columns="Date", values="Value")
return render_template("article.html", article=article, df=df_pivot)
@app.route("/")
def index():
articles = Article.query.all()
return render_template("index.html", articles=articles)
def create_tables():
with app.app_context():
db.create_all()
db.session.commit()
if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True)
create_tables()