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Author: kunmi02

subscription/app_setup.py

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+from configure import detect_configuration_mode
+from subscription import create_app
+from subscription.core import db
+
+
+configuration_mode = detect_configuration_mode()
+
+application = create_app(configuration_mode)
+
+with application.app_context():
+    db.init_app(application)
+    db.Model.metadata.reflect(db.engine)  # load existing DB schema
+    db.create_all()
+

subscription/app_setup.pyc

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+# -*- coding: utf-8 -*-
+"""
+    config
+    ----------------------
+    A module providing all configuration for the application.
+"""
+import os
+
+
+basedir = os.path.abspath(os.path.dirname(__file__))
+
+
+class BaseConfig(object):
+    SECRET_KEY = 'your-super-secret-key'
+    LOG_REQUESTS = True
+
+    # pagination
+    PAGINATION_DEFAULT_PAGE = 1
+    PAGINATION_DEFAULT_PER_PAGE = 20
+
+    DEFAULT_REQUESTS_TIMEOUT = 11.0  # seconds
+
+
+class DevelopmentConfig(BaseConfig):
+    DEBUG = True
+    TESTING = False
+
+
+class PilotConfig(BaseConfig):
+    DEBUG = False
+    TESTING = False
+
+
+class ProductionConfig(BaseConfig):
+    DEBUG = False
+    TESTING = False
+
+
+class TestConfig(BaseConfig):
+    DEBUG = False
+    TESTING = True
+
+    # SQLALCHEMY_DATABASE_URI = "sqlite:///subscription_db"
+    SQLALCHEMY_DATABASE_URI = "sqlite://"  # in-memory database
+
+
+config_modes = {
+    'development': DevelopmentConfig,
+    'testing': TestConfig,
+    'pilot': PilotConfig,
+    'production': ProductionConfig
+}
+
+
+def detect_configuration_mode():
+    from subscription.core.constants import ALLOWED_CONFIGURATION_MODES
+    from subscription.core.errors import ConfigNotFound
+
+    config_mode = os.environ['RUNNING_MODE']
+    if config_mode in ALLOWED_CONFIGURATION_MODES:
+        print '"%s" configuration mode detected.' % config_mode
+        return config_mode
+
+    error_message = ('Invalid or no configuration mode ("{0}") detected! '
+                     'Aborting...'.format(config_mode))
+    raise ConfigNotFound(error_message)
+
+
+def load_configuration(app, mode):
+    """
+    Load the applicable configuration for the application
+    :param app: the application
+    :param mode: the mode signalling which configuration object to load
+    :return: None
+    """
+
+    configuration = config_modes[mode]
+    app.config.from_object(configuration)  # Load pre-defined by class/object
+
+    # Load from environment
+    instance_config = {
+        True: 'config.py',
+        False: 'test_config.py'
+    }[configuration != TestConfig]
+    app.config.from_pyfile(instance_config, silent=True)
+

subscription/configure/__init__.py

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+import multiprocessing
+
+bind = '0.0.0.0:[PORT]'  # sample '0.0.0.0:1234'
+workers = multiprocessing.cpu_count()  # or a smaller number
+user = 'your_linux_username'
+accesslog = '/path/to/your_app/logs/gunicorn.log'
+errorlog = '/path/to/your_app/logs/gunicorn.err.log'
+loglevel = 'debug'
+access_log_format = '[%(h)15s] (%(s)s) [%(D)8sms] %(r)s | %(b)sb'
+proc_name = 'your_app_name_gunicorn'
+timeout=120

subscription/configure/__init__.pyc

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+import os
+
+# You need to replace the next values with the appropriate values for your configuration
+
+basedir = os.path.abspath(os.path.dirname(__file__))
+SQLALCHEMY_ECHO = False
+SQLALCHEMY_TRACK_MODIFICATIONS = True
+SQLALCHEMY_DATABASE_URI = "postgresql://azeez:root@localhost/subscriptions"

subscription/gunicorn_config.py.sample

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+from flask_script import Manager, Shell, Server
+from flask_migrate import Migrate, MigrateCommand
+
+from app_setup import application
+from subscription.core.models import db
+
+manager = Manager(application)
+migrate = Migrate(application, db)
+
+
+@manager.shell
+def _make_context():
+    return dict(app=application, db=db)
+
+
+manager.add_command('db', MigrateCommand)
+manager.add_command("runserver", Server())
+manager.add_command("shell", Shell(make_context=_make_context))
+
+
+if __name__ == '__main__':
+    manager.run()
+

subscription/instance/config.py

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+Generic single-database configuration.

subscription/manage.py

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+# A generic, single database configuration.
+
+[alembic]
+# template used to generate migration files
+# file_template = %%(rev)s_%%(slug)s
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+
+# Logging configuration
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARN
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARN
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S

subscription/migrations/README

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+from __future__ import with_statement
+from alembic import context
+from sqlalchemy import engine_from_config, pool
+from logging.config import fileConfig
+import logging
+
+# this is the Alembic Config object, which provides
+# access to the values within the .ini file in use.
+config = context.config
+
+# Interpret the config file for Python logging.
+# This line sets up loggers basically.
+fileConfig(config.config_file_name)
+logger = logging.getLogger('alembic.env')
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+from flask import current_app
+config.set_main_option('sqlalchemy.url',
+                       current_app.config.get('SQLALCHEMY_DATABASE_URI'))
+target_metadata = current_app.extensions['migrate'].db.metadata
+
+# other values from the config, defined by the needs of env.py,
+# can be acquired:
+# my_important_option = config.get_main_option("my_important_option")
+# ... etc.
+
+
+def run_migrations_offline():
+    """Run migrations in 'offline' mode.
+
+    This configures the context with just a URL
+    and not an Engine, though an Engine is acceptable
+    here as well.  By skipping the Engine creation
+    we don't even need a DBAPI to be available.
+
+    Calls to context.execute() here emit the given string to the
+    script output.
+
+    """
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(url=url)
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online():
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+
+    # this callback is used to prevent an auto-migration from being generated
+    # when there are no changes to the schema
+    # reference: http://alembic.zzzcomputing.com/en/latest/cookbook.html
+    def process_revision_directives(context, revision, directives):
+        if getattr(config.cmd_opts, 'autogenerate', False):
+            script = directives[0]
+            if script.upgrade_ops.is_empty():
+                directives[:] = []
+                logger.info('No changes in schema detected.')
+
+    engine = engine_from_config(config.get_section(config.config_ini_section),
+                                prefix='sqlalchemy.',
+                                poolclass=pool.NullPool)
+
+    connection = engine.connect()
+    context.configure(connection=connection,
+                      target_metadata=target_metadata,
+                      process_revision_directives=process_revision_directives,
+                      **current_app.extensions['migrate'].configure_args)
+
+    try:
+        with context.begin_transaction():
+            context.run_migrations()
+    finally:
+        connection.close()
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

subscription/migrations/alembic.ini

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+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+branch_labels = ${repr(branch_labels)}
+depends_on = ${repr(depends_on)}
+
+
+def upgrade():
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade():
+    ${downgrades if downgrades else "pass"}

subscription/migrations/env.py

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+"""empty message
+
+Revision ID: 23c17475112c
+Revises: cac1e8da4b7e
+Create Date: 2019-09-23 14:37:25.057891
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '23c17475112c'
+down_revision = 'cac1e8da4b7e'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('subscriptions',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('email_address', sa.String(length=50), nullable=True),
+    sa.Column('added_at', sa.DateTime(), nullable=False),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('email_address')
+    )
+    op.drop_table('api_v1')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('api_v1',
+    sa.Column('id', sa.INTEGER(), autoincrement=True, nullable=False),
+    sa.Column('email_address', sa.VARCHAR(length=50), autoincrement=False, nullable=True),
+    sa.Column('added_at', postgresql.TIMESTAMP(), server_default=sa.text(u'CURRENT_TIMESTAMP'), autoincrement=False, nullable=False),
+    sa.PrimaryKeyConstraint('id', name=u'subscribers_pkey'),
+    sa.UniqueConstraint('email_address', name=u'subscribers_email_address_key')
+    )
+    op.drop_table('subscriptions')
+    # ### end Alembic commands ###

subscription/migrations/env.pyc

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+"""empty message
+
+Revision ID: 4fcb504c8a47
+Revises: 23c17475112c
+Create Date: 2019-09-24 17:15:18.565747
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '4fcb504c8a47'
+down_revision = '23c17475112c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('subscriptions', sa.Column('email', sa.String(length=50), nullable=True))
+    op.drop_constraint(u'subscriptions_email_address_key', 'subscriptions', type_='unique')
+    op.create_unique_constraint(None, 'subscriptions', ['email'])
+    op.drop_column('subscriptions', 'email_address')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('subscriptions', sa.Column('email_address', sa.VARCHAR(length=50), autoincrement=False, nullable=True))
+    op.drop_constraint(None, 'subscriptions', type_='unique')
+    op.create_unique_constraint(u'subscriptions_email_address_key', 'subscriptions', ['email_address'])
+    op.drop_column('subscriptions', 'email')
+    # ### end Alembic commands ###