set up pg and alembic

.env

@@ -0,0 +1,12 @@
+DB_OVERRIDES_STRING=postgresql://root:coolpass@postgres:5432/fastapi
+
+DB_CONNECTION=postgresql
+DB_HOST=postgres
+DB_PORT=5432
+DB_DATABASE=fastapi
+DB_USERNAME=root
+DB_PASSWORD=coolpass
+
+POSTGRES_DB=fastapi
+POSTGRES_USER:root
+POSTGRES_PASSWORD:coolpass

alembic.ini

@@ -0,0 +1,110 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts
+script_location = migrations
+
+# 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.
+prepend_sys_path = .
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python-dateutil library that can be
+# installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to dateutil.tz.gettz()
+# 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 migrations/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 "version_path_separator" below.
+# version_locations = %(here)s/bar:%(here)s/bat:migrations/versions
+
+# version path separator; As mentioned above, this is the character used to split
+# version_locations. The default within new alembic.ini files is "os", which uses os.pathsep.
+# If this key is omitted entirely, it falls back to the legacy behavior of splitting on spaces and/or commas.
+# Valid values for version_path_separator are:
+#
+# version_path_separator = :
+# version_path_separator = ;
+# version_path_separator = space
+version_path_separator = os  # Use os.pathsep. Default configuration used for new projects.
+
+# 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
+
+sqlalchemy.url = postgresql://root:coolpass@postgres:5432/fastapi
+
+
+[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
+
+# 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

docker-compose.yml

@@ -6,9 +6,24 @@ services:
     build:
       context: .
     env_file:
-      - .env-non-dev
+      - .env
     command: ["/backend_labs/docker/app.sh"]
     ports:
       - "8000:8000"
     volumes:
       - .:/backend_labs
+    depends_on:
+      - postgres
+
+  postgres:
+    image: postgres:15.3
+    container_name: postgres
+    volumes:
+      - postgres_data:/var/lib/postgresql/data/
+    env_file:
+      - .env
+    ports:
+      - "5432:5432"
+
+volumes:
+  postgres_data:

migrations/README

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

migrations/env.py

@@ -0,0 +1,82 @@
+from logging.config import fileConfig
+
+from sqlalchemy import engine_from_config
+from sqlalchemy import pool
+from sqlmodel import SQLModel
+
+from alembic import context
+
+from src.users.models import *
+from src.products.models import *
+
+# 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
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+target_metadata = SQLModel.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()

migrations/script.py.mako

@@ -0,0 +1,25 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+${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() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

migrations/versions/c5aff621ba6c_init.py

@@ -0,0 +1,43 @@
+"""init
+
+Revision ID: c5aff621ba6c
+Revises: 
+Create Date: 2023-06-19 03:22:03.751334
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlmodel
+
+
+# revision identifiers, used by Alembic.
+revision = 'c5aff621ba6c'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('products',
+    sa.Column('name', sqlmodel.sql.sqltypes.AutoString(), nullable=False),
+    sa.Column('price', sa.Float(), nullable=False),
+    sa.Column('image', sqlmodel.sql.sqltypes.AutoString(), nullable=False),
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('users',
+    sa.Column('first_name', sqlmodel.sql.sqltypes.AutoString(), nullable=False),
+    sa.Column('last_name', sqlmodel.sql.sqltypes.AutoString(), nullable=False),
+    sa.Column('email', sqlmodel.sql.sqltypes.AutoString(), nullable=False),
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('users')
+    op.drop_table('products')
+    # ### end Alembic commands ###

poetry.lock

@@ -1,5 +1,25 @@
 # This file is automatically @generated by Poetry 1.4.2 and should not be changed by hand.
 
+[[package]]
+name = "alembic"
+version = "1.11.1"
+description = "A database migration tool for SQLAlchemy."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "alembic-1.11.1-py3-none-any.whl", hash = "sha256:dc871798a601fab38332e38d6ddb38d5e734f60034baeb8e2db5b642fccd8ab8"},
+    {file = "alembic-1.11.1.tar.gz", hash = "sha256:6a810a6b012c88b33458fceb869aef09ac75d6ace5291915ba7fae44de372c01"},
+]
+
+[package.dependencies]
+Mako = "*"
+SQLAlchemy = ">=1.3.0"
+typing-extensions = ">=4"
+
+[package.extras]
+tz = ["python-dateutil"]
+
 [[package]]
 name = "anyio"
 version = "3.7.0"
@@ -320,6 +340,26 @@ MarkupSafe = ">=2.0"
 [package.extras]
 i18n = ["Babel (>=2.7)"]
 
+[[package]]
+name = "mako"
+version = "1.2.4"
+description = "A super-fast templating language that borrows the best ideas from the existing templating languages."
+category = "main"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "Mako-1.2.4-py3-none-any.whl", hash = "sha256:c97c79c018b9165ac9922ae4f32da095ffd3c4e6872b45eded42926deea46818"},
+    {file = "Mako-1.2.4.tar.gz", hash = "sha256:d60a3903dc3bb01a18ad6a89cdbe2e4eadc69c0bc8ef1e3773ba53d44c3f7a34"},
+]
+
+[package.dependencies]
+MarkupSafe = ">=0.9.2"
+
+[package.extras]
+babel = ["Babel"]
+lingua = ["lingua"]
+testing = ["pytest"]
+
 [[package]]
 name = "markupsafe"
 version = "2.1.3"
@@ -380,6 +420,29 @@ files = [
     {file = "MarkupSafe-2.1.3.tar.gz", hash = "sha256:af598ed32d6ae86f1b747b82783958b1a4ab8f617b06fe68795c7f026abbdcad"},
 ]
 
+[[package]]
+name = "psycopg2"
+version = "2.9.6"
+description = "psycopg2 - Python-PostgreSQL Database Adapter"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+files = [
+    {file = "psycopg2-2.9.6-cp310-cp310-win32.whl", hash = "sha256:f7a7a5ee78ba7dc74265ba69e010ae89dae635eea0e97b055fb641a01a31d2b1"},
+    {file = "psycopg2-2.9.6-cp310-cp310-win_amd64.whl", hash = "sha256:f75001a1cbbe523e00b0ef896a5a1ada2da93ccd752b7636db5a99bc57c44494"},
+    {file = "psycopg2-2.9.6-cp311-cp311-win32.whl", hash = "sha256:53f4ad0a3988f983e9b49a5d9765d663bbe84f508ed655affdb810af9d0972ad"},
+    {file = "psycopg2-2.9.6-cp311-cp311-win_amd64.whl", hash = "sha256:b81fcb9ecfc584f661b71c889edeae70bae30d3ef74fa0ca388ecda50b1222b7"},
+    {file = "psycopg2-2.9.6-cp36-cp36m-win32.whl", hash = "sha256:11aca705ec888e4f4cea97289a0bf0f22a067a32614f6ef64fcf7b8bfbc53744"},
+    {file = "psycopg2-2.9.6-cp36-cp36m-win_amd64.whl", hash = "sha256:36c941a767341d11549c0fbdbb2bf5be2eda4caf87f65dfcd7d146828bd27f39"},
+    {file = "psycopg2-2.9.6-cp37-cp37m-win32.whl", hash = "sha256:869776630c04f335d4124f120b7fb377fe44b0a7645ab3c34b4ba42516951889"},
+    {file = "psycopg2-2.9.6-cp37-cp37m-win_amd64.whl", hash = "sha256:a8ad4a47f42aa6aec8d061fdae21eaed8d864d4bb0f0cade5ad32ca16fcd6258"},
+    {file = "psycopg2-2.9.6-cp38-cp38-win32.whl", hash = "sha256:2362ee4d07ac85ff0ad93e22c693d0f37ff63e28f0615a16b6635a645f4b9214"},
+    {file = "psycopg2-2.9.6-cp38-cp38-win_amd64.whl", hash = "sha256:d24ead3716a7d093b90b27b3d73459fe8cd90fd7065cf43b3c40966221d8c394"},
+    {file = "psycopg2-2.9.6-cp39-cp39-win32.whl", hash = "sha256:1861a53a6a0fd248e42ea37c957d36950da00266378746588eab4f4b5649e95f"},
+    {file = "psycopg2-2.9.6-cp39-cp39-win_amd64.whl", hash = "sha256:ded2faa2e6dfb430af7713d87ab4abbfc764d8d7fb73eafe96a24155f906ebf5"},
+    {file = "psycopg2-2.9.6.tar.gz", hash = "sha256:f15158418fd826831b28585e2ab48ed8df2d0d98f502a2b4fe619e7d5ca29011"},
+]
+
 [[package]]
 name = "pydantic"
 version = "1.10.9"
@@ -661,4 +724,4 @@ standard = ["colorama (>=0.4)", "httptools (>=0.5.0)", "python-dotenv (>=0.13)",
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.10"
-content-hash = "ce99eaaecbd0286bf5702b0129fbfe2306b058c66a41d353ffafc30e7d691e43"
+content-hash = "d8e14ff24fc3331bc8f60ef7c6cf375ef1c67c6b36d372fd14347c1ee3246c9b"

pyproject.toml

@@ -19,6 +19,8 @@ requests = "^2.31.0"
 uvicorn = "^0.22.0"
 sqlmodel = "^0.0.8"
 jinja2 = "^3.1.2"
+alembic = "^1.11.1"
+psycopg2 = "^2.9.6"
 
 
 [build-system]

src/database.py

@@ -1,11 +1,18 @@
+import os
+
 from sqlmodel import SQLModel, create_engine, Session
 
-sqlite_file_name = "database.sqlite"
+# db_string = "sqlite:///database.sqlite"
-sqlite_url = f"sqlite:///{sqlite_file_name}"
 
-connect_args = {"check_same_thread": False}
+db_string = os.environ.get("DB_OVERRIDES_STRING")
+if not db_string:
+    db_string = f'{os.environ.get("DB_CONNECTION")}://' \
+                f'{os.environ.get("DB_USERNAME")}:{os.environ.get("DB_PASSWORD", default="")}@' \
+                f'{os.environ.get("DB_HOST")}:{os.environ.get("DB_PORT")}/{os.environ.get("DB_DATABASE")}'
 
-engine = create_engine(sqlite_url, connect_args=connect_args, echo=False)
+connect_args = {"check_same_thread": False} if "sqlite" in db_string else {}
+
+engine = create_engine(db_string, connect_args=connect_args, echo=False)
 
 
 def create_db_and_tables():

src/main.py

@@ -1,3 +1,5 @@
+import os
+
 from fastapi import FastAPI
 
 from database import create_db_and_tables
@@ -5,8 +7,3 @@ from routes import main_router
 
 app = FastAPI()
 app.include_router(router=main_router)
-
-
-@app.on_event("startup")
-def on_startup():
-    create_db_and_tables()