app.py

from flask import Flask, render_template, request, redirect, url_for, flash
from flask_sqlalchemy import SQLAlchemy
from flask_wtf import FlaskForm
from wtforms import StringField, TextAreaField, SubmitField
from wtforms.validators import DataRequired
from datetime import datetime
from flask_migrate import Migrate

app = Flask(__name__)
app.config['SECRET_KEY'] = 'mysecretkey'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///database.db'

db = SQLAlchemy(app)
migrate = Migrate(app, db)

class BlogPost(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    title = 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)

class PostForm(FlaskForm):
    title = StringField('Title', validators=[DataRequired()])
    content = TextAreaField('Content', validators=[DataRequired()])
    submit = SubmitField('Post')

@app.route('/')
def index():
    posts = BlogPost.query.all()
    return render_template('index.html', posts=posts)

@app.route('/post/new', methods=['GET', 'POST'])
def new_post():
    form = PostForm()
    if form.validate_on_submit():
        post = BlogPost(title=form.title.data, content=form.content.data)
        db.session.add(post)
        db.session.commit()
        flash('Your post has been created!', 'success')
        return redirect(url_for('index'))
    return render_template('new_post.html', form=form)

@app.errorhandler(404)
def not_found_error(error):
    return render_template('404.html'), 404

@app.errorhandler(500)
def internal_error(error):
    db.session.rollback()
    return render_template('500.html'), 500

if __name__ == '__main__':
    app.run(debug=True)