feat: alembic migration added

backend/.env

@@ -0,0 +1 @@
+DATABASE_URL=postgresql://user:password@localhost:5432/mydatabase

backend/alembic.ini

@@ -0,0 +1,141 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts.
+# this is typically a path given in POSIX (e.g. forward slashes)
+# format, relative to the token %(here)s which refers to the location of this
+# ini file
+script_location = %(here)s/alembic
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
+# for all available tokens
+# file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.  for multiple paths, the path separator
+# is defined by "path_separator" below.
+prepend_sys_path = .
+
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python>=3.9 or backports.zoneinfo library and tzdata library.
+# Any required deps can installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to ZoneInfo()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to <script_location>/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "path_separator"
+# below.
+# version_locations = %(here)s/bar:%(here)s/bat:%(here)s/alembic/versions
+
+# path_separator; This indicates what character is used to split lists of file
+# paths, including version_locations and prepend_sys_path within configparser
+# files such as alembic.ini.
+# The default rendered in new alembic.ini files is "os", which uses os.pathsep
+# to provide os-dependent path splitting.
+#
+# Note that in order to support legacy alembic.ini files, this default does NOT
+# take place if path_separator is not present in alembic.ini.  If this
+# option is omitted entirely, fallback logic is as follows:
+#
+# 1. Parsing of the version_locations option falls back to using the legacy
+#    "version_path_separator" key, which if absent then falls back to the legacy
+#    behavior of splitting on spaces and/or commas.
+# 2. Parsing of the prepend_sys_path option falls back to the legacy
+#    behavior of splitting on spaces, commas, or colons.
+#
+# Valid values for path_separator are:
+#
+# path_separator = :
+# path_separator = ;
+# path_separator = space
+# path_separator = newline
+#
+# Use os.pathsep. Default configuration used for new projects.
+path_separator = os
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# database URL.  This is consumed by the user-maintained env.py script only.
+# other means of configuring database URLs may be customized within the env.py
+# file.
+sqlalchemy.url = postgresql://user:password@localhost:5432/mydatabase
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# lint with attempts to fix using "ruff" - use the exec runner, execute a binary
+# hooks = ruff
+# ruff.type = exec
+# ruff.executable = %(here)s/.venv/bin/ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Logging configuration.  This is also consumed by the user-maintained
+# env.py script only.
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARNING
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARNING
+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

backend/alembic/README

@@ -0,0 +1 @@
+Generic single-database configuration.

backend/alembic/env.py

@@ -0,0 +1,74 @@
+from logging.config import fileConfig
+from app.database import Base
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+
+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.
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+# add your model's MetaData object here
+# for 'autogenerate' support
+target_metadata = 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() -> None:
+    """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,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    """Run migrations in 'online' mode.
+
+    In this scenario we need to create an Engine
+    and associate a connection with the context.
+
+    """
+    connectable = engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(connection=connection, target_metadata=target_metadata)
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

backend/alembic/script.py.mako

@@ -0,0 +1,28 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+# revision identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}

backend/alembic/versions/a3ac646e53a8_init.py

@@ -0,0 +1,41 @@
+"""init
+
+Revision ID: a3ac646e53a8
+Revises: 
+Create Date: 2025-06-04 21:36:22.283823
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'a3ac646e53a8'
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_items_id'), table_name='items')
+    op.drop_index(op.f('ix_items_name'), table_name='items')
+    op.drop_table('items')
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('items',
+    sa.Column('id', sa.INTEGER(), autoincrement=True, nullable=False),
+    sa.Column('name', sa.VARCHAR(), autoincrement=False, nullable=True),
+    sa.Column('description', sa.VARCHAR(), autoincrement=False, nullable=True),
+    sa.PrimaryKeyConstraint('id', name=op.f('items_pkey'))
+    )
+    op.create_index(op.f('ix_items_name'), 'items', ['name'], unique=False)
+    op.create_index(op.f('ix_items_id'), 'items', ['id'], unique=False)
+    # ### end Alembic commands ###

backend/app/crud.py

@@ -10,7 +10,7 @@ def get_items(db: Session, skip: int = 0, limit: int = 10):
     return db.query(models.Item).offset(skip).limit(limit).all()
 
 
-def create_item(db: Session, item: schemas.ItemCreate):
+def create_item(db: Session, item: schemas.Item):
     db_item = models.Item(**item.model_dump())
     db.add(db_item)
     db.commit()

backend/app/database.py

@@ -1,10 +1,10 @@
 from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker, declarative_base
 import os
+from dotenv import load_dotenv
 
-DATABASE_URL = os.getenv(
+env = load_dotenv()
-    "DATABASE_URL", "postgresql://user:password@db:5432/mydatabase"
+DATABASE_URL = os.getenv("DATABASE_URL", "")
-)
 
 engine = create_engine(DATABASE_URL)
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

backend/app/main.py

@@ -23,7 +23,7 @@ def health_check():
 
 
 @app.post("/items/", response_model=schemas.Item)
-def create_item(item: schemas.ItemCreate, db: Session = Depends(get_db)):
+def create_item(item: schemas.Item, db: Session = Depends(get_db)):
     return crud.create_item(db, item)
 
 

backend/app/schemas.py

@@ -4,10 +4,7 @@ from pydantic import BaseModel
 class ItemBase(BaseModel):
     name: str
     description: str | None = None
-
+    body: str
-
-class ItemCreate(ItemBase):
-    pass
 
 
 class Item(ItemBase):

backend/docs/migration.md

@@ -0,0 +1,13 @@
+# Database Migration with Alembic
+
+## Install Alembic
+
+## Init Alembic
+
+## Migration
+
+```bash
+
+alembic revision --autogenerate -m "add items table"
+alembic upgrade head
+```

backend/pyproject.toml

@@ -5,6 +5,8 @@ description = "Add your description here"
 readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
+    "alembic>=1.16.1",
+    "dotenv>=0.9.9",
     "fastapi[standard]>=0.115.12",
     "psycopg2-binary>=2.9.10",
     "sqlalchemy>=2.0.41",

backend/uv.lock

@@ -2,6 +2,20 @@ version = 1
 revision = 2
 requires-python = ">=3.11"
 
+[[package]]
+name = "alembic"
+version = "1.16.1"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "mako" },
+    { name = "sqlalchemy" },
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/20/89/bfb4fe86e3fc3972d35431af7bedbc60fa606e8b17196704a1747f7aa4c3/alembic-1.16.1.tar.gz", hash = "sha256:43d37ba24b3d17bc1eb1024fe0f51cd1dc95aeb5464594a02c6bb9ca9864bfa4", size = 1955006, upload-time = "2025-05-21T23:11:05.991Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/31/59/565286efff3692c5716c212202af61466480f6357c4ae3089d4453bff1f3/alembic-1.16.1-py3-none-any.whl", hash = "sha256:0cdd48acada30d93aa1035767d67dff25702f8de74d7c3919f2e8492c8db2e67", size = 242488, upload-time = "2025-05-21T23:11:07.783Z" },
+]
+
 [[package]]
 name = "annotated-types"
 version = "0.7.0"
@@ -64,6 +78,17 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/68/1b/e0a87d256e40e8c888847551b20a017a6b98139178505dc7ffb96f04e954/dnspython-2.7.0-py3-none-any.whl", hash = "sha256:b4c34b7d10b51bcc3a5071e7b8dee77939f1e878477eeecc965e9835f63c6c86", size = 313632, upload-time = "2024-10-05T20:14:57.687Z" },
 ]
 
+[[package]]
+name = "dotenv"
+version = "0.9.9"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "python-dotenv" },
+]
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/b2/b7/545d2c10c1fc15e48653c91efde329a790f2eecfbbf2bd16003b5db2bab0/dotenv-0.9.9-py2.py3-none-any.whl", hash = "sha256:29cf74a087b31dafdb5a446b6d7e11cbce8ed2741540e2339c69fbef92c94ce9", size = 1892, upload-time = "2025-02-19T22:15:01.647Z" },
+]
+
 [[package]]
 name = "email-validator"
 version = "2.2.0"
@@ -250,6 +275,18 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/62/a1/3d680cbfd5f4b8f15abc1d571870c5fc3e594bb582bc3b64ea099db13e56/jinja2-3.1.6-py3-none-any.whl", hash = "sha256:85ece4451f492d0c13c5dd7c13a64681a86afae63a5f347908daf103ce6d2f67", size = 134899, upload-time = "2025-03-05T20:05:00.369Z" },
 ]
 
+[[package]]
+name = "mako"
+version = "1.3.10"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "markupsafe" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/9e/38/bd5b78a920a64d708fe6bc8e0a2c075e1389d53bef8413725c63ba041535/mako-1.3.10.tar.gz", hash = "sha256:99579a6f39583fa7e5630a28c3c1f440e4e97a414b80372649c0ce338da2ea28", size = 392474, upload-time = "2025-04-10T12:44:31.16Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/87/fb/99f81ac72ae23375f22b7afdb7642aba97c00a713c217124420147681a2f/mako-1.3.10-py3-none-any.whl", hash = "sha256:baef24a52fc4fc514a0887ac600f9f1cff3d82c61d4d700a1fa84d597b88db59", size = 78509, upload-time = "2025-04-10T12:50:53.297Z" },
+]
+
 [[package]]
 name = "markdown-it-py"
 version = "3.0.0"
@@ -536,6 +573,8 @@ name = "server"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
+    { name = "alembic" },
+    { name = "dotenv" },
     { name = "fastapi", extra = ["standard"] },
     { name = "psycopg2-binary" },
     { name = "sqlalchemy" },
@@ -544,6 +583,8 @@ dependencies = [
 
 [package.metadata]
 requires-dist = [
+    { name = "alembic", specifier = ">=1.16.1" },
+    { name = "dotenv", specifier = ">=0.9.9" },
     { name = "fastapi", extras = ["standard"], specifier = ">=0.115.12" },
     { name = "psycopg2-binary", specifier = ">=2.9.10" },
     { name = "sqlalchemy", specifier = ">=2.0.41" },