Avatar of Dolamite Jenkins
Dolamite JenkinsFlag for United States of America asked on

I am trying to learn Flask but I can not get past this error with my sqlite database ...

from flask import Flask, render_template,request,redirect
import smtplib
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime
import sqlite3

app = Flask(__name__)

app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///friends.db' # Don't have this line below the next
db = SQLAlchemy(app)

#Create Model

class Friends(db.Model):
     id = db.Column(db.Integer,primary_key=True)
     name = db.Column(db.String(200),nullable = False)
     date_created = db.Column(db.DateTime, default=datetime.utcnow)

    #create String
     def __repr__(self):
        return '<Name %r>' % self.id

@app.route('/friends', methods =['POST' , 'GET'])
def friends():
    title = "Cmy friend"

    if request.method == "POST":
        friend_name = request.form['name']
        new_friend = Friends(name = friend_name)

            return redirect('/friends')
            return "there was ans error "

        friends = Friends.query.order_by(Friends.date_created)
        return render_template("friends.html",title=title, friends=friends)

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{% block title %}{{ title }}{% endblock %}
{% block content %}
      <div class="container">
        <h1>Friends ...</h1>
          <form action="/>friends" METHOD="POST">
              <input type="text" placeholder="Name" name="name">
              <input type="=submit" value="Add Name"
                     class="btn btn-secoundary ">

          {% for friend in friends %}
                {{ friend.name}}
          {% endfor %}
{% endblock %}

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I have the database but when I run it I get the following error 

Internal Server Error
The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

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This is the trace back
  File "/Users/clayrichmond/Dev/flaskWholeCourse/venv/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 717, in do_execute
    cursor.execute(statement, parameters)
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) no such column: friends.date_created [SQL: SELECT friends.id AS friends_id, friends.name AS friends_name, friends.date_created AS friends_date_created FROM friends ORDER BY friends.date_created] (Background on this error at: https://sqlalche.me/e/14/e3q8) - - [07/Oct/2021 12:24:32] "GET /friends HTTP/1.1" 500 -

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Avatar of undefined
Last Comment
David Favor

8/22/2022 - Mon

Did you had a look at what the link above https://sqlalche.me/e/14/e3q8  tells you about the operational error?
Essentially your database friends table does not have the date_created  column as per above error message: "no such column: friends.date_created" comming from the SQL Statement:
SELECT friends.id AS friends_id, friends.name AS friends_name, friends.date_created AS friends_date_created FROM friends ORDER BY friends.date_created

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Dolamite Jenkins

I did and I tried solving it ... the column is there see attached pix of database  ...then I tried deleting the query ... and still the error
David Favor

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