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Can't search any non-English [Unicode] using html form on flask app

I have 4 data table created with sqlalchemy + mysql.
2 is with English data and other 2 with Bangla[unicode] data. Everything is working fine when i search from my html form and showing the result from every table on my local computer.
after deploying on a cPanel based shared hosting non-English data not showing anymore. [ if i create loop every data shows but not showing any filter data when i search after hosting.
even when i use non-English url it's not working on production server. but in local computer works fine.
I don't know whats the porblem.
here all the code
app.py:
from flask import Flask, render_template, abort, session, redirect, request,url_for,make_response
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime,timedelta
from flask_admin import Admin
from flask_admin.contrib.sqla import ModelView
import sqlalchemy
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = "mysql+pymysql://usernameisok:passwordisok#localhost/sobdarth_sobdartho"
app.config['SECRET_KEY'] = "tanvir.comahmedoke"
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
db = SQLAlchemy(app)
admin = Admin(app)
Model:
This tables data not showing anything when i search but other English table works fine.
class BanglaBangla(db.Model):
word_id = db.Column(db.Integer, primary_key=True)
bn_word = db.Column(db.String(70), nullable=False)
word_type = db.Column(db.Text, nullable=True)
core_meaning = db.Column(db.Text, nullable=True)
bn_definition = db.Column(db.Text, nullable=True)
next = db.Column(db.String(70), nullable=True)
prev = db.Column(db.String(70), nullable=True)
def __repr__(self):
return f'<bn_to_bn id: {self.word_id}, word: {self.bn_word}>'
Routing:
#app.route("/bangla-to-bangla/")
def bn2bn():
try:
word1 = request.args.get('bangla2bangla')
return redirect(url_for('bn2bn_result', bn_word=word1))
except:
return render_template('files/bn2bn/bn2bn404.html')
#app.route("/bangla-to-bangla/<bn_word>")
def bn2bn_result(bn_word):
try:
bangla = BanglaBangla.query.filter_by(bn_word=bn_word).one()
return render_template('files/bn2bn/bn2bn.html', bn_word=bangla)
except:
return render_template("files/bn2bn/bn2bn404.html")
Templates:
<form method="get" action="/bangla-to-bangla/">
<input type="text" name="bangla" id="bangla" {% if bn_word.bn_word == None %} placeholder="Type Word..."{% else %} value="{{ bn_word.bn_word }}" {% endif %}>
<button>Search</button>
</form>
<div class="meaning outputs" >
<h1>{{ bn_word.bn_word }} Meaning In Bangla</h1>
<p><b>{{ bn_word.core_meaning }}</b> ({{ bn_word.word_type }})</p>
</div>
this is how i started my app with requirements.txt :
Click to check the image

Try to contact with your hosting provider maybe.
Not Sure Whats the problem. hope someone help you.

Python Flask: sqlalchemy.exc.ArgumentError: Could not parse rfc1738 URL from string 'sqlite

I am learning Python Flask and I am working to a blog as personal project. I am using a combination of Flask and Sqlite but I am stuck because it seems that my system (I am using Windows 10) is not able to find the path to the database. This is my code:
from flask import Flask, render_template, request, redirect, url_for
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite: ////C:/Users/admin/Desktop/Blog_Project/blog.db'
db = SQLAlchemy(app)
class Blogpost(db.Model):
id = db.Column(db.Integer, primary_key = True)
title = db.Column(db.String(50))
subtitle = db.Column(db.String(50))
author = db.Column(db.String(20))
date_posted = db.Column(db.DateTime)
content = db.Column(db.Text)
#app.route('/')
def index():
return render_template('index.html')
#app.route('/about')
def about():
return render_template('about.html')
#app.route('/post')
def post():
return render_template('post.html')
#app.route('/contact')
def contact():
return render_template('contact.html')
#app.route('/prova')
def prova():
return render_template('prova.html')
#app.route('/add')
def add():
return render_template('add.html')
#app.route('/addpost', methods=['POST'])
def addpost():
title = request.form['title']
subtitle = request.form['subtitle']
author = request.form["author"]
content = request.form['content']
post = Blogpost(title=title, subtitle=subtitle, author=author, content=content, date_posted=datetime.now())
db.session.add(post)
db.session.commit()
return redirect(url_for('index'))
if __name__ == "__main__":
app.run(debug = True)
But when I try to add a post in the corresponding webpage, I get this error:
sqlalchemy.exc.ArgumentError
sqlalchemy.exc.ArgumentError: Could not parse rfc1738 URL from string 'sqlite: ////C:/Users/admin/Desktop/Blog_Project/blog.db'
Actually the database should exist, since I see the file in my folder (the path is the one in the code)
Have you got any idea how I can solve the problem?

Try using double slashes:
sqlite: ////C:\\Users\\admin\\Desktop\\Blog_Project\\blog.db
or if you want to stay on windows, use the windows formation:
sqlite: ////C:\Users\admin\Desktop\Blog_Project\blog.db
you can learn more in this detailed answer: Windows path in Python

For the convenience of Linux and Windows users, I have summarized the solutions for this problem on Windows and Linux:
from sqlalchemy import create_engine
# relative path on Linux: with three slashes
e = create_engine('sqlite:///relative/path/to/database.db')
# absolute path on Linux: with four slashes
e = create_engine('sqlite:////absolute/path/to/database.db')
# absolute path on Windows
e = create_engine('sqlite:///C:\\absolute\\path\\to\\database.db')
For detailed documents: SQLAlchemy 1.4 Documentation

app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///blog.db'

sqllite database with Flask not instantiating

I'm trying to make a todo list web app with Flask. I need to make an instance of a database to store the tasks. For some reason when I try to make the instance it doesn't work. I am sure this is the issue because when I remove the part that uses the database from the code it runs fine.
Here is the code
from flask import Flask, render_template, request, redirect
from flask_sqlalchemy import SQLAlchemy
from datetime import datetime
flask1 = Flask(__name__)
# I think this is telling our app where to look for the database
# Three slashes == relative path. four == absolute path
flask1.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///test.db'
# initializing the database
db = SQLAlchemy(flask1)
class Todo(db.Model):
id = db.Column(db.Integer, primary_key=True)
content = db.Column(db.String(200), nullable=False)
date_created = db.Column(db.DateTime, default=datetime.ctime)
def __repr__(self):
return "<Task %r>" % self.id
# To actually instatiate the database
# 1- start python shell
# 2- import db
# 3- db.create_all()
# 4- exit shell
#flask1.route('/', methods=['POST', 'GET'])
def index():
if request.method == 'POST':
task_content = request.form['content']
new_task = Todo(content=task_content)
try:
db.session.add(new_task)
db.session.commit()
return redirect('/')
except:
return 'there was an issue adding the task'
else:
tasks = Todo.query.order_by(Todo.date_created).first
return render_template('index.html', tasks=tasks)
if __name__ == "__main__":
flask1.run(debug=True)
Now in the else block, if I return render_template like this
return render_template('index.html')
There is no error. This is because I use the tasks variable in my index.html file
Here is the code HTML code that generates the error
<!-- {% for task in tasks %} -->
<tr>
<td>{{ task.content }}</td>
<td> {{task.date_created.date }}</td>
<td>
delete
<br>
Update
</td>
</tr>
<!-- {% endfor %} -->
The error I'm getting right now is TypeError: 'NoneType' object is not iterable. I believe this means that the instance of my database was not successfully created.
I try to create the db instance in the following method
1- open python shell
2- import this script
3- db.create_all()
4- exit python shell
Any help is appreciated
Sorry for a long question

I think you meant to get all the tasks and call all():
tasks = Todo.query.order_by(Todo.date_created).all()

Cannot add comment to SQL db in python Flask app

I am new to programming and have setup a small website with a comments section on pythonanywhere.com, relaying heavily on their tutorial. But when I post a comment in the form, the comment is not added to the database and for some reason the program redirects me to the index page (the intention is to redirect to stay on the same page)
Any suggestions as to what I might be doing wrong would be greatly appreciated!
The pyhthon code:
import random
from flask import Flask, request, session, redirect, url_for, render_template, flash
from flask.ext.sqlalchemy import SQLAlchemy
from werkzeug.routing import RequestRedirect
app = Flask(__name__)
app.config["DEBUG"] = True
SQLALCHEMY_DATABASE_URI = "mysql+mysqlconnector://{username}:{password}#{hostname}/{databasename}".format(
username="username",
password="password",
hostname="hostname",
databasename="majaokholm$majaokholm",
)
app.config["SQLALCHEMY_DATABASE_URI"] = SQLALCHEMY_DATABASE_URI
app.config["SQLALCHEMY_POOL_RECYCLE"] = 299
db = SQLAlchemy(app)
class Comment(db.Model):
__tablename__ = "comments"
id = db.Column(db.Integer, primary_key=True)
content = db.Column(db.String(4096))
#app.route("/")
def index():
return render_template("index_page.html")
#app.route('/post', methods=["GET", "POST"])
def post():
if request.method == "GET":
return render_template("post_page.html", comments=Comment.query.all())
comment = Comment(content=request.form["contents"])
db.session.add(comment)
db.session.commit()
return redirect(url_for('post'))
and the form from the HTML template:
<form action="." method="POST">
<textarea class="form-control" name="contents" placeholder="Enter a
comment"></textarea>
<input type="submit" value="Post comment">
</form>
Thanks a lot in advance!

Currently, the action="." in the form actually points to the root of the current directory, which for /post happens to be just / and thus points to the index.
It's always better to use action="{{ url_for('your_target_view') }}" instead.

get rid of action=".", you can use action=""

Flask 405 Error

I keep getting this error when trying to insert some simple text into a db.
Method Not Allowed
The method is not allowed for the requested URL."
I'm moving from PHP to python so bear with me here.
The code is:
from flask import Flask, request, session, g, redirect, url_for, \
abort, render_template, flash
from flask.ext.sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:password#localhost/pythontest'
db = SQLAlchemy(app)
app = Flask(__name__)
#app.route('/justadded/')
def justadded():
cur = g.db.execute('select TerminalError, TerminalSolution from Submissions order by id desc')
entries = [dict(title=row[0], text=row[1]) for row in cur.fetchall()]
return render_template('view_all.html', entries=entries)
#app.route('/new', methods= "POST")
def newsolution():
if not request.method == 'POST':
abort(401)
g.db.execute('INSERT INTO Submissions (TerminalError, TerminalSolution, VALUES (?, ?)'
[request.form['TerminalError'], request.form['TerminalSolution']])
g.db.commit()
flash('Succesful')
return redirect(url_for('justadded'))
#app.route('/')
def index():
return render_template('index.html')
#app.route('/viewall/')
def viewall():
return render_template('view_all.html')
if __name__ == '__main__':
app.run()
And the html code for the form is:
<form action="/new" method="POST">
<input name="TerminalError" id="searchbar" type="text" placeholder="Paste Terminal error here...">
<input name="TerminalSolution" id="searchbar" type="text" placeholder="Paste Terminal solution here...">
<button type="submit" id="search" class="btn btn-primary">Contribute</button>
</form>

The error has nothing to do with inserting data into the database, it's the methods argument of your /new route.
Instead of this:
#app.route('/new', methods= "POST")
do this:
#app.route('/new', methods= ["POST"])
The list of valid methods needs to be given as an array.