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Copy of alembic/env.py from wakatime.com allowing usage of --autogenerate flag when creating new schema migrations
from __future__ import with_statement
from alembic import context
from alembic.util.compat import configparser
from sqlalchemy import engine_from_config, pool
from logging.config import fileConfig
import os
import re
import sys
basedir = os.path.abspath(os.path.dirname(__file__) + '/../')
sys.path.append(basedir)
from wakatime.config import SQLALCHEMY_DATABASE_URI
from wakatime.models import db
# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config
config.set_section_option('alembic', 'sqlalchemy.url', SQLALCHEMY_DATABASE_URI)
# Interpret the config file for Python logging.
# This line sets up loggers basically.
fileConfig(config.config_file_name)
# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
target_metadata = 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 include_object(object, name, obj_type, reflected, compare_to):
try:
section = config.get_section('alembic:exclude')
except configparser.NoSectionError:
return True
exclude_tables = []
tables = section.get('tables', None)
if tables is not None:
exclude_tables = [re.compile(pattern.strip(), re.IGNORECASE) for pattern in tables.split("\n")]
if obj_type == 'table':
found = False
for pattern in exclude_tables:
if pattern.search(name):
found = True
break
if found:
return False
return True
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, target_metadata=target_metadata,
include_object=include_object)
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.
"""
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,
compare_server_default=True,
compare_type=True,
include_object=include_object
)
try:
with context.begin_transaction():
context.run_migrations()
finally:
connection.close()
if context.is_offline_mode():
run_migrations_offline()
else:
run_migrations_online()
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