Pg_dump -h localhost -U $DBUSER $DBNAME | gzip > $BACKUP_PATH/$DBNAME-$(date %Y-%m-%d).db.gz 2> $BACKUP_PATH/error. pgpassįind $BACKUP_PATH -type f -name "*.db.gz" | xargs rm Load the data into database: psql -h localhost -U $DBUSER $DBNAME. You can prepare the sql statements according to the template: alter sequence seq_name restart with max_id 1. You will also need to set value for the sequences, or replace ids in sql file. Grep -vx -f schema.sql dump.sql > data.sqlĮdit dump file, and replace: PRAGMA foreign_keys=OFF > '' The :z suffix solves the permission denied problem for the volume.Ĭreate user and database: psql -h localhost -U postgrespsql -h localhost -U postgresĬhange the database URL in the Flask project to: sudo dnf install postgresql-devel $ sudo podman run -name postgres12 -pod $PODNAME -e POSTGRES_PASSWORD=$PASSWORD -d -v /home/$USER/podman/volumes/postgres12:/var/lib/postgresql/data:z postgres:12 $ mkdir -p /home/$USER/podman/volumes/postgres12 # Create a Pod to link more containers in the future import sqlite3 import click from flask import currentapp, g from flask.cli import withappcontext def initapp (app): app.teardownappcontext (closedb) (initdbcommand) def initdb (): db getdb () with currentapp.openresource ('schema.sql') as d: db.executescript (d.read ().decode ('utf8')) mand ('i. To make the container a system wide service run the commands as root ( sudo): $ dnf install podman If you use docker then just replace all the podman commands with docker. Install podman (Fedora's docker) and prepare the volume to store the database data persistently. The main added complication is making sure the Postgres server is running.Migrating form SqlLite to Postgresql in Flask Run PostgreSql in container With the Postgres connection string, you can repeat all the examples in this chapter using a Postgres The /books at the end is the name of the database.īy replacing the SQLite connection string As a result, the connection string becomes: connection_string = 'postgresql://localhost:5432/books' ![]() If you’re on a Mac or Linux machine, or if you’ve followed the steps above for Windows, then there should be no username or password required when you run on the same machine the database server is running My new connection string is: connection_string = is your database username and password, respectively. The connection string for PostgresSQL, connecting to the books database. To run all of the same code, we only need to replace the connection string for SQLite with Whereas SQLite is built into Python, Postgres requires an additional package. Shall the new role be allowed to create more new roles? (y/n) nĪt this point, you should be able to create a database using createdb from the command line. Shall the new role be allowed to create databases? (y/n) y Shall the new role be a superuser? (y/n) n If the username on the machine is socra, the declaration would be as follows: PS C:> createuser -U postgres -interactive -pwprompt In Windows, additionally, you will need to create a Postgres user account, which must Postgres=# alter user postgres with password 'dbpass' Here, we change it to dbpass: PS C:> psql -U postgres The password entered must match the generated password from the install warning. It would be best if you considered changing the auto-generated password to something better. The connection string used later in the config file assumes this has been done. You can turn that off by changing the fileĬ:\Program Files\PostgreSQL\11\data\pg_hba.conf by replacing instances of md5 with In Windows, the default is to set the password. WARNING: Generated password: 68e68124b68d449aae87b9416f5d1108īy default, Postgres on Mac, installed with Homebrew, will allow connections without a password. ![]() WARNING: You did not specify a password for the postgres user, so an insecure one has been generated for you. In Windows, you can run Chocolatey from a PowerShell, running as Administrator: PS C:> choco install postgresql11Ī warning that you did not specify a password will come up. This runs Postgres from your own user account, which will have Postgres store its files in a Library subdirectory of your user account. Also, we’ll start the server if it is not already started. import sqlite3 import click from flask import currentapp, g def getdb(): if 'db' not in g: g.db nnect( nfig'DATABASE', detecttypessqlite3.PARSEDECLTYPES ) g.db.rowfactory sqlite3.Row return g.db def closedb(eNone): db g.pop('db', None) if db is not None: db. The version is specified differently by different package To remain compatible with Heroku, we will install Versionġ1 (rather than the newest, Version 12). ![]() In Mac, you can do this with Homebrew: $ brew install brew services start PostgreSQL
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