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This commit is contained in:
Azeez Muibi
2025-04-11 10:37:17 +01:00
parent 9116d54b4f
commit 144499a4b6
6 changed files with 0 additions and 288 deletions
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SQL/site_data.sql
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CREATE TABLE transactions (
id SERIAL,
transaction_id VARCHAR(50) NOT NULL,
account_id VARCHAR(50) NOT NULL,
type VARCHAR(50) NOT NULL,
channel VARCHAR(8) NOT NULL,
created_at timestamp with time zone DEFAULT now(),
updated_at timestamp with time zone DEFAULT now()
);
ALTER TABLE ONLY transactions
ADD CONSTRAINT transactions_id_key UNIQUE (id);
migrations/README
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Single-database configuration for Flask.
migrations/alembic.ini
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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,flask_migrate
[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
[logger_flask_migrate]
level = INFO
handlers =
qualname = flask_migrate
[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
migrations/env.py
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import logging
from logging.config import fileConfig
from flask import current_app
from alembic import context
# 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')
def get_engine():
try:
# this works with Flask-SQLAlchemy<3 and Alchemical
return current_app.extensions['migrate'].db.get_engine()
except (TypeError, AttributeError):
# this works with Flask-SQLAlchemy>=3
return current_app.extensions['migrate'].db.engine
def get_engine_url():
try:
return get_engine().url.render_as_string(hide_password=False).replace(
'%', '%%')
except AttributeError:
return str(get_engine().url).replace('%', '%%')
# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
config.set_main_option('sqlalchemy.url', get_engine_url())
target_db = current_app.extensions['migrate'].db
# 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 get_metadata():
if hasattr(target_db, 'metadatas'):
return target_db.metadatas[None]
return target_db.metadata
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=get_metadata(), literal_binds=True
)
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.')
conf_args = current_app.extensions['migrate'].configure_args
if conf_args.get("process_revision_directives") is None:
conf_args["process_revision_directives"] = process_revision_directives
connectable = get_engine()
with connectable.connect() as connection:
context.configure(
connection=connection,
target_metadata=get_metadata(),
**conf_args
)
with context.begin_transaction():
context.run_migrations()
if context.is_offline_mode():
run_migrations_offline()
else:
run_migrations_online()
migrations/script.py.mako
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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"}
migrations/versions/b8f6fd76ead8_migration_on_thu_apr_10_16_21_45_utc_.py
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"""Migration on Thu Apr 10 16:21:45 UTC 2025
Revision ID: b8f6fd76ead8
Revises:
Create Date: 2025-04-10 16:22:15.946157
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql
# revision identifiers, used by Alembic.
revision = 'b8f6fd76ead8'
down_revision = None
branch_labels = None
depends_on = None
def upgrade():
# ### commands auto generated by Alembic - please adjust! ###
op.create_table('repayments',
sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
sa.Column('loan_id', sa.String(length=50), nullable=False),
sa.Column('customer_id', sa.String(length=50), nullable=False),
sa.Column('product_id', sa.String(length=20), nullable=True),
sa.Column('created_at', sa.DateTime(), nullable=True),
sa.Column('updated_at', sa.DateTime(), nullable=True),
sa.PrimaryKeyConstraint('id')
)
with op.batch_alter_table('loans', schema=None) as batch_op:
batch_op.alter_column('id',
existing_type=sa.VARCHAR(length=50),
type_=sa.Integer(),
existing_nullable=False,
autoincrement=True,
existing_server_default=sa.text("nextval('loan_id_seq'::regclass)"))
with op.batch_alter_table('transactions', schema=None) as batch_op:
batch_op.alter_column('channel',
existing_type=sa.VARCHAR(length=8),
type_=sa.String(length=50),
existing_nullable=False)
batch_op.alter_column('created_at',
existing_type=postgresql.TIMESTAMP(timezone=True),
type_=sa.DateTime(),
existing_nullable=True,
existing_server_default=sa.text('now()'))
batch_op.alter_column('updated_at',
existing_type=postgresql.TIMESTAMP(timezone=True),
type_=sa.DateTime(),
existing_nullable=True,
existing_server_default=sa.text('now()'))
batch_op.drop_constraint('transactions_id_key', type_='unique')
# ### end Alembic commands ###
def downgrade():
# ### commands auto generated by Alembic - please adjust! ###
with op.batch_alter_table('transactions', schema=None) as batch_op:
batch_op.create_unique_constraint('transactions_id_key', ['id'])
batch_op.alter_column('updated_at',
existing_type=sa.DateTime(),
type_=postgresql.TIMESTAMP(timezone=True),
existing_nullable=True,
existing_server_default=sa.text('now()'))
batch_op.alter_column('created_at',
existing_type=sa.DateTime(),
type_=postgresql.TIMESTAMP(timezone=True),
existing_nullable=True,
existing_server_default=sa.text('now()'))
batch_op.alter_column('channel',
existing_type=sa.String(length=50),
type_=sa.VARCHAR(length=8),
existing_nullable=False)
with op.batch_alter_table('loans', schema=None) as batch_op:
batch_op.alter_column('id',
existing_type=sa.Integer(),
type_=sa.VARCHAR(length=50),
existing_nullable=False,
autoincrement=True,
existing_server_default=sa.text("nextval('loan_id_seq'::regclass)"))
op.drop_table('repayments')
# ### end Alembic commands ###