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@ -1,9 +1,8 @@ |
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import logging |
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from logging.config import fileConfig |
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from flask import current_app |
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from alembic import context |
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from flask import current_app |
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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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@ -12,32 +11,35 @@ 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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logger = logging.getLogger('alembic.env') |
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logger = logging.getLogger("alembic.env") |
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def get_engine(): |
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try: |
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# this works with Flask-SQLAlchemy<3 and Alchemical |
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return current_app.extensions['migrate'].db.get_engine() |
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return current_app.extensions["migrate"].db.get_engine() |
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except (TypeError, AttributeError): |
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# this works with Flask-SQLAlchemy>=3 |
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return current_app.extensions['migrate'].db.engine |
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return current_app.extensions["migrate"].db.engine |
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def get_engine_url(): |
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try: |
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return get_engine().url.render_as_string(hide_password=False).replace( |
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'%', '%%') |
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return ( |
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get_engine() |
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.url.render_as_string(hide_password=False) |
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.replace("%", "%%") |
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) |
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except AttributeError: |
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return str(get_engine().url).replace('%', '%%') |
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return str(get_engine().url).replace("%", "%%") |
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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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config.set_main_option('sqlalchemy.url', get_engine_url()) |
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target_db = current_app.extensions['migrate'].db |
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config.set_main_option("sqlalchemy.url", get_engine_url()) |
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target_db = current_app.extensions["migrate"].db |
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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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@ -46,7 +48,7 @@ target_db = current_app.extensions['migrate'].db |
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def get_metadata(): |
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if hasattr(target_db, 'metadatas'): |
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if hasattr(target_db, "metadatas"): |
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return target_db.metadatas[None] |
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return target_db.metadata |
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@ -84,13 +86,13 @@ def run_migrations_online(): |
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# when there are no changes to the schema |
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# reference: http://alembic.zzzcomputing.com/en/latest/cookbook.html |
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def process_revision_directives(context, revision, directives): |
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if getattr(config.cmd_opts, 'autogenerate', False): |
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if getattr(config.cmd_opts, "autogenerate", False): |
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script = directives[0] |
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if script.upgrade_ops.is_empty(): |
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directives[:] = [] |
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logger.info('No changes in schema detected.') |
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logger.info("No changes in schema detected.") |
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conf_args = current_app.extensions['migrate'].configure_args |
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conf_args = current_app.extensions["migrate"].configure_args |
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if conf_args.get("process_revision_directives") is None: |
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conf_args["process_revision_directives"] = process_revision_directives |
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@ -98,9 +100,7 @@ def run_migrations_online(): |
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with connectable.connect() as connection: |
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context.configure( |
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connection=connection, |
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target_metadata=get_metadata(), |
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**conf_args |
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connection=connection, target_metadata=get_metadata(), **conf_args |
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) |
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with context.begin_transaction(): |
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