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use alembic to effect various changes of the data, closes #12

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1 parent e51d04a commit bc147c1b1d0cae2a58c978b858633f7d6a80f48c @xrotwang xrotwang committed Oct 30, 2013
Showing with 179 additions and 0 deletions.
  1. +53 −0 alembic.ini
  2. +1 −0 migrations/README
  3. +73 −0 migrations/env.py
  4. +25 −0 migrations/script.py.mako
  5. +27 −0 migrations/versions/274ff6197e85_wals_2013.py
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+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = migrations
+
+# 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
+
+sqlalchemy.url = postgresql://robert@/wals3
+
+[production]
+script_location = migrations
+sqlalchemy.url = postgresql://wals3@/wals3
+
+# 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
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+Generic single-database configuration.
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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
+
+# 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)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+from clld.db import meta
+from glottolog3 import models
+target_metadata = meta.Base.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.
+
+ """
+ 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
+ )
+
+ 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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+<%text># coding=utf-8</%text>
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision}
+Create Date: ${create_date}
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = ${repr(up_revision)}
+down_revision = ${repr(down_revision)}
+
+import datetime
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+def upgrade():
+ ${upgrades if upgrades else "pass"}
+
+def downgrade():
+ ${downgrades if downgrades else "pass"}
+
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+# coding=utf-8
+"""WALS 2013
+
+Revision ID: 274ff6197e85
+Revises: None
+Create Date: 2013-10-30 21:43:35.339017
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '274ff6197e85'
+down_revision = None
+
+import datetime
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+ conn = op.get_bind()
+ #12
+ conn.execute("update identifier set name = 'Bembe' where name = 'Bembe (CK if same Bembe)'")
+
+
+def downgrade():
+ pass

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