add Linux_i686
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113
Linux_i686/lib/python2.7/site-packages/flask_migrate/__init__.py
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113
Linux_i686/lib/python2.7/site-packages/flask_migrate/__init__.py
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import os
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from flask import current_app
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from flask.ext.script import Manager
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from alembic.config import Config as AlembicConfig
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from alembic import command
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class _MigrateConfig(object):
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def __init__(self, db, directory):
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self.db = db
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self.directory = directory
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@property
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def metadata(self):
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"""Backwards compatibility, in old releases app.extensions['migrate']
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was set to db, and env.py accessed app.extensions['migrate'].metadata"""
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return self.db.metadata
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class Migrate(object):
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def __init__(self, app = None, db = None, directory = 'migrations'):
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if app is not None and db is not None:
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self.init_app(app, db, directory)
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def init_app(self, app, db, directory = 'migrations'):
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if not hasattr(app, 'extensions'):
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app.extensions = {}
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app.extensions['migrate'] = _MigrateConfig(db, directory)
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class Config(AlembicConfig):
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def get_template_directory(self):
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package_dir = os.path.abspath(os.path.dirname(__file__))
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return os.path.join(package_dir, 'templates')
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def _get_config(directory):
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if directory is None:
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directory = current_app.extensions['migrate'].directory
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config = Config(os.path.join(directory, 'alembic.ini'))
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config.set_main_option('script_location', directory)
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return config
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MigrateCommand = Manager(usage = 'Perform database migrations')
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "migration script directory (default is 'migrations')")
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def init(directory = None):
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"Generates a new migration"
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if directory is None:
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directory = current_app.extensions['migrate'].directory
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config = Config()
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config.set_main_option('script_location', directory)
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config.config_file_name = os.path.join(directory, 'alembic.ini')
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command.init(config, directory, 'flask')
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "Migration script directory (default is 'migrations')")
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def current(directory = None):
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"Display the current revision for each database."
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config = _get_config(directory)
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command.current(config)
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@MigrateCommand.option('-r', '--rev-range', dest = 'rev_range', default = None, help = "Specify a revision range; format is [start]:[end]")
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "Migration script directory (default is 'migrations')")
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def history(directory = None, rev_range = None):
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"List changeset scripts in chronological order."
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config = _get_config(directory)
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command.history(config, rev_range)
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@MigrateCommand.option('--sql', dest = 'sql', action = 'store_true', default = False, help = "Don't emit SQL to database - dump to standard output instead")
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@MigrateCommand.option('--autogenerate', dest = 'autogenerate', action = 'store_true', default = False, help = "Populate revision script with andidate migration operatons, based on comparison of database to model")
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@MigrateCommand.option('-m', '--message', dest = 'message', default = None)
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "Migration script directory (default is 'migrations')")
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def revision(directory = None, message = None, autogenerate = False, sql = False):
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"Create a new revision file."
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config = _get_config(directory)
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command.revision(config, message, autogenerate = autogenerate, sql = sql)
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@MigrateCommand.option('--sql', dest = 'sql', action = 'store_true', default = False, help = "Don't emit SQL to database - dump to standard output instead")
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@MigrateCommand.option('-m', '--message', dest = 'message', default = None)
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "Migration script directory (default is 'migrations')")
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def migrate(directory = None, message = None, sql = False):
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"Alias for 'revision --autogenerate'"
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config = _get_config(directory)
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command.revision(config, message, autogenerate = True, sql = sql)
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@MigrateCommand.option('--tag', dest = 'tag', default = None, help = "Arbitrary 'tag' name - can be used by custom env.py scripts")
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@MigrateCommand.option('--sql', dest = 'sql', action = 'store_true', default = False, help = "Don't emit SQL to database - dump to standard output instead")
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@MigrateCommand.option('revision', default = None, help = "revision identifier")
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "Migration script directory (default is 'migrations')")
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def stamp(directory = None, revision = 'head', sql = False, tag = None):
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"'stamp' the revision table with the given revision; don't run any migrations"
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config = _get_config(directory)
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command.stamp(config, revision, sql = sql, tag = tag)
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@MigrateCommand.option('--tag', dest = 'tag', default = None, help = "Arbitrary 'tag' name - can be used by custom env.py scripts")
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@MigrateCommand.option('--sql', dest = 'sql', action = 'store_true', default = False, help = "Don't emit SQL to database - dump to standard output instead")
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@MigrateCommand.option('revision', nargs = '?', default = 'head', help = "revision identifier")
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "Migration script directory (default is 'migrations')")
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def upgrade(directory = None, revision = 'head', sql = False, tag = None):
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"Upgrade to a later version"
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config = _get_config(directory)
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command.upgrade(config, revision, sql = sql, tag = tag)
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@MigrateCommand.option('--tag', dest = 'tag', default = None, help = "Arbitrary 'tag' name - can be used by custom env.py scripts")
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@MigrateCommand.option('--sql', dest = 'sql', action = 'store_true', default = False, help = "Don't emit SQL to database - dump to standard output instead")
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@MigrateCommand.option('revision', nargs = '?', default = "-1", help = "revision identifier")
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "Migration script directory (default is 'migrations')")
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def downgrade(directory = None, revision = '-1', sql = False, tag = None):
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"Revert to a previous version"
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config = _get_config(directory)
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command.downgrade(config, revision, sql = sql, tag = tag)
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@MigrateCommand.option('-d', '--directory', dest = 'directory', default = None, help = "Migration script directory (default is 'migrations')")
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def branches(directory = None):
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"Lists revisions that have broken the source tree into two versions representing two independent sets of changes"
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config = _get_config(directory)
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command.branches(config)
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Generic single-database configuration.
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# A generic, single database configuration.
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[alembic]
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# template used to generate migration files
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# file_template = %%(rev)s_%%(slug)s
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# set to 'true' to run the environment during
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# the 'revision' command, regardless of autogenerate
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# revision_environment = false
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# Logging configuration
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[loggers]
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keys = root,sqlalchemy,alembic
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[handlers]
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keys = console
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[formatters]
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keys = generic
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[logger_root]
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level = WARN
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handlers = console
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qualname =
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[logger_sqlalchemy]
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level = WARN
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handlers =
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qualname = sqlalchemy.engine
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[logger_alembic]
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level = INFO
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handlers =
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qualname = alembic
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[handler_console]
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class = StreamHandler
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args = (sys.stderr,)
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level = NOTSET
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formatter = generic
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[formatter_generic]
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format = %(levelname)-5.5s [%(name)s] %(message)s
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datefmt = %H:%M:%S
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from __future__ import with_statement
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from alembic import context
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from sqlalchemy import engine_from_config, pool
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from logging.config import fileConfig
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# this is the Alembic Config object, which provides
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# access to the values within the .ini file in use.
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config = context.config
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# Interpret the config file for Python logging.
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# This line sets up loggers basically.
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fileConfig(config.config_file_name)
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# add your model's MetaData object here
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# for 'autogenerate' support
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# from myapp import mymodel
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# target_metadata = mymodel.Base.metadata
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from flask import current_app
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config.set_main_option('sqlalchemy.url', current_app.config.get('SQLALCHEMY_DATABASE_URI'))
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target_metadata = current_app.extensions['migrate'].db.metadata
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# other values from the config, defined by the needs of env.py,
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# can be acquired:
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# my_important_option = config.get_main_option("my_important_option")
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# ... etc.
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def run_migrations_offline():
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"""Run migrations in 'offline' mode.
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This configures the context with just a URL
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and not an Engine, though an Engine is acceptable
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here as well. By skipping the Engine creation
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we don't even need a DBAPI to be available.
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Calls to context.execute() here emit the given string to the
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script output.
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"""
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url = config.get_main_option("sqlalchemy.url")
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context.configure(url=url)
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with context.begin_transaction():
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context.run_migrations()
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def run_migrations_online():
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"""Run migrations in 'online' mode.
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In this scenario we need to create an Engine
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and associate a connection with the context.
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"""
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engine = engine_from_config(
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config.get_section(config.config_ini_section),
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prefix='sqlalchemy.',
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poolclass=pool.NullPool)
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connection = engine.connect()
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context.configure(
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connection=connection,
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target_metadata=target_metadata
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)
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try:
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with context.begin_transaction():
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context.run_migrations()
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finally:
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connection.close()
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()
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"""${message}
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Revision ID: ${up_revision}
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Revises: ${down_revision}
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Create Date: ${create_date}
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"""
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# revision identifiers, used by Alembic.
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revision = ${repr(up_revision)}
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down_revision = ${repr(down_revision)}
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from alembic import op
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import sqlalchemy as sa
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${imports if imports else ""}
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def upgrade():
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${upgrades if upgrades else "pass"}
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def downgrade():
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${downgrades if downgrades else "pass"}
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