WIP with Flask
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737771c11c
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@ -11,8 +11,6 @@ Vagrant.configure("2") do |config|
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v.cpus = 2
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end
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config.vm.network "forwarded_port", guest: 3306, host: 3306
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config.vm.synced_folder ".", "/vagrant", type: "virtualbox"
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#Begin des Installationsscripts
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@ -43,6 +41,8 @@ Vagrant.configure("2") do |config|
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source /home/vagrant/venv/bin/activate
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pip3 install wheel
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pip3 install -r /vagrant/requirements.txt
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python3 mariadb_setup.py
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python3 cassandra_setup.py
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deactivate
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SHELL
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@ -0,0 +1,62 @@
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"""
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Python by Techfossguru
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Copyright (C) 2017 Satish Prasad
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"""
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import logging
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from cassandra.cluster import Cluster, BatchStatement
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from cassandra import ConsistencyLevel
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from cassandra.query import SimpleStatement
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class PythonCassandraExample:
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def __init__(self):
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self.cluster = None
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self.session = None
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self.keyspace = None
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self.log = None
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def __del__(self):
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self.cluster.shutdown()
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def createsession(self):
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self.cluster = Cluster(['localhost'])
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self.session = self.cluster.connect(self.keyspace)
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def getsession(self):
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return self.session
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# How about Adding some log info to see what went wrong
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def setlogger(self):
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log = logging.getLogger()
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log.setLevel('INFO')
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handler = logging.StreamHandler()
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handler.setFormatter(logging.Formatter(
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"%(asctime)s [%(levelname)s] %(name)s: %(message)s"))
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log.addHandler(handler)
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self.log = log
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def insert_data(self):
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insert_sql = self.session.prepare(
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"INSERT INTO employee (emp_id, ename , sal,city) VALUES (?,?,?,?)")
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batch = BatchStatement()
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batch.add(insert_sql, (1, 'LyubovK', 2555, 'Dubai'))
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batch.add(insert_sql, (2, 'JiriK', 5660, 'Toronto'))
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batch.add(insert_sql, (3, 'IvanH', 2547, 'Mumbai'))
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batch.add(insert_sql, (4, 'YuliaT', 2547, 'Seattle'))
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self.session.execute(batch)
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self.log.info('Batch Insert Completed')
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def select_data(self):
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rows = self.session.execute('select * from employee limit 5;')
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for row in rows:
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print(row.ename, row.sal)
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def update_data(self):
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pass
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def delete_data(self):
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pass
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@ -0,0 +1,79 @@
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"""
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Python by Techfossguru
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Copyright (C) 2017 Satish Prasad
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"""
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import logging
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from cassandra.cluster import Cluster, BatchStatement
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class PythonCassandraExample:
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def __init__(self):
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self.cluster = None
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self.session = None
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self.keyspace = None
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self.log = None
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def __del__(self):
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self.cluster.shutdown()
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def createsession(self):
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self.cluster = Cluster(['localhost'])
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self.session = self.cluster.connect(self.keyspace)
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def getsession(self):
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return self.session
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# How about Adding some log info to see what went wrong
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def setlogger(self):
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log = logging.getLogger()
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log.setLevel('INFO')
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handler = logging.StreamHandler()
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handler.setFormatter(logging.Formatter(
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"%(asctime)s [%(levelname)s] %(name)s: %(message)s"))
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log.addHandler(handler)
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self.log = log
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# Create Keyspace based on Given Name
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def createkeyspace(self, keyspace):
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"""
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:param keyspace: The Name of Keyspace to be created
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:return:
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"""
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# Before we create new lets check if exiting keyspace; we will drop
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# that and create new
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rows = self.session.execute(
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"SELECT keyspace_name FROM system_schema.keyspaces")
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if keyspace in [row[0] for row in rows]:
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self.log.info("dropping existing keyspace...")
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self.session.execute("DROP KEYSPACE " + keyspace)
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self.log.info("creating keyspace...")
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self.session.execute("""
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CREATE KEYSPACE %s
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WITH replication = { 'class': 'SimpleStrategy', 'replication_factor': '2' }
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""" % keyspace)
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self.log.info("setting keyspace...")
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self.session.set_keyspace(keyspace)
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def create_table(self):
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c_sql = """
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CREATE TABLE IF NOT EXISTS employee (emp_id int PRIMARY KEY,
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ename varchar,
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sal double,
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city varchar);
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"""
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self.session.execute(c_sql)
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self.log.info("Employee Table Created !!!")
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# lets do some batch insert
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if __name__ == '__main__':
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example1 = PythonCassandraExample()
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example1.createsession()
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example1.setlogger()
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example1.createkeyspace('techfossguru')
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example1.create_table()
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example1.insert_data()
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example1.select_data()
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@ -1,10 +0,0 @@
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#!/usr/bin/python
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import mysql.connector as mariadb
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mariadb_connection = mariadb.connect(user='vagrant',
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database='testdb')
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cursor = mariadb_connection.cursor()
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cursor.execute("create table if not exists test (a bigint auto_increment primary key, first_name varchar(128), last_name varchar(128))")
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cursor.execute("INSERT INTO test (first_name,last_name) VALUES (%s,%s)", ("first_name", "last_name"))
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mariadb_connection.commit()
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@ -0,0 +1,42 @@
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#!/usr/bin/python
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import mysql.connector as mariadb
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mariadb_connection = mariadb.connect(user='vagrant',
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database='testdb')
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cursor = mariadb_connection.cursor()
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cursor.execute("""create table if not exists test (
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id bigint auto_increment primary key,
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first_name varchar(128),
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middle_name varchar(128)),
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last_name varchar(128)),
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street_name varchar(128)),
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city_name varchar(128)),
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state_name varchar(128)),
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country_name varchar(128)),
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telephonenumber varchar(128)),
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mobile_number varchar(128)),
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email varchar(128)),
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hobby varchar(128)),
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gender varchar(128)),
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salutation varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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last_name varchar(128)),
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""")
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cursor.execute("""INSERT INTO test (first_name,last_name) VALUES (%s,%s)""",
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("first_name", "last_name"))
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mariadb_connection.commit()
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cursor.execute("select * from test")
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data = cursor.fetchall()
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for row in data:
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print(row)
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@ -0,0 +1,50 @@
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from flask import Flask
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from flask_sqlalchemy import SQLAlchemy
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app = Flask(__name__)
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app.config['SQLALCHEMY_DATABASE_URI'] = (
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'mysql+mysqlconnector://vagrant@localhost/testdb')
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app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
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db = SQLAlchemy(app)
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class Country(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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name = db.Column(db.String(80), unique=True, nullable=False)
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def __repr__(self):
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return '<Country %r>' % self.name
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class City(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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zip_code = db.Column(db.Integer, unique=True, nullable=False)
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name = db.Column(db.String(80), unique=True, nullable=False)
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country_id = db.Column(db.Integer, db.ForeignKey('country.id'),
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nullable=False)
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country = db.relationship('City', backref=db.backref('countrys',
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lazy=True))
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def __repr__(self):
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return '<City %r>' % self.name
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class User(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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username = db.Column(db.String(80), unique=True, nullable=False)
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email = db.Column(db.String(120), unique=True, nullable=False)
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first_name = db.Column(db.String(120), nullable=False)
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last_name = db.Column(db.String(120), nullable=False)
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middle_name = db.Column(db.String(120), nullable=False)
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street_name = db.Column(db.String(120), nullable=False)
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telephonenumber = db.Column(db.String(120), nullable=False)
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mobile_number = db.Column(db.String(120), nullable=False)
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hobby = db.Column(db.String(120), nullable=False)
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salutation = db.Column(db.String(120), nullable=False)
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gender = db.Column(db.String(120), nullable=False)
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city_id = db.Column(db.Integer, db.ForeignKey('city.id'), nullable=False)
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city = db.relationship('City', backref=db.backref('users', lazy=True))
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def __repr__(self):
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return '<User %r>' % self.username
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@ -0,0 +1,19 @@
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#!/usr/bin/python
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import mysql.connector as mariadb
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mariadb_connection = mariadb.connect(user='vagrant',
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database='testdb')
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cursor = mariadb_connection.cursor()
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cursor.execute("""create table if not exists test (
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a bigint auto_increment primary key,
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first_name varchar(128),
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last_name varchar(128))""")
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cursor.execute("""INSERT INTO test (first_name,last_name) VALUES (%s,%s)""",
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("first_name", "last_name"))
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mariadb_connection.commit()
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cursor.execute("select * from test")
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data = cursor.fetchall()
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for row in data:
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print(row)
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@ -0,0 +1,4 @@
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from mariadb_db import db
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db.create_all()
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@ -1,3 +1,6 @@
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wheel
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cassandra-driver
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flask
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flask-sqlalchemy
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flask-cqlalchemy
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mysql-connector
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