♻️ Refactor project generation, discard cookiecutter, use plain git/clone/fork (#553)

src/backend/app/alembic/README

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+Generic single-database configuration.

src/backend/app/alembic/env.py

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+from __future__ import with_statement
+
+import os
+
+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
+# target_metadata = None
+
+from app.db.base import Base  # noqa
+
+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 get_url():
+    user = os.getenv("POSTGRES_USER", "postgres")
+    password = os.getenv("POSTGRES_PASSWORD", "")
+    server = os.getenv("POSTGRES_SERVER", "db")
+    db = os.getenv("POSTGRES_DB", "app")
+    return f"postgresql://{user}:{password}@{server}/{db}"
+
+
+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 = get_url()
+    context.configure(
+        url=url, target_metadata=target_metadata, literal_binds=True, compare_type=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.
+
+    """
+    configuration = config.get_section(config.config_ini_section)
+    configuration["sqlalchemy.url"] = get_url()
+    connectable = engine_from_config(
+        configuration, prefix="sqlalchemy.", poolclass=pool.NullPool,
+    )
+
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection, target_metadata=target_metadata, compare_type=True
+        )
+
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

src/backend/app/alembic/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"}

src/backend/app/alembic/versions/d4867f3a4c0a_first_revision.py

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+"""First revision
+
+Revision ID: d4867f3a4c0a
+Revises:
+Create Date: 2019-04-17 13:53:32.978401
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "d4867f3a4c0a"
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        "user",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("full_name", sa.String(), nullable=True),
+        sa.Column("email", sa.String(), nullable=True),
+        sa.Column("hashed_password", sa.String(), nullable=True),
+        sa.Column("is_active", sa.Boolean(), nullable=True),
+        sa.Column("is_superuser", sa.Boolean(), nullable=True),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(op.f("ix_user_email"), "user", ["email"], unique=True)
+    op.create_index(op.f("ix_user_full_name"), "user", ["full_name"], unique=False)
+    op.create_index(op.f("ix_user_id"), "user", ["id"], unique=False)
+    op.create_table(
+        "item",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("title", sa.String(), nullable=True),
+        sa.Column("description", sa.String(), nullable=True),
+        sa.Column("owner_id", sa.Integer(), nullable=True),
+        sa.ForeignKeyConstraint(["owner_id"], ["user.id"],),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index(op.f("ix_item_description"), "item", ["description"], unique=False)
+    op.create_index(op.f("ix_item_id"), "item", ["id"], unique=False)
+    op.create_index(op.f("ix_item_title"), "item", ["title"], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f("ix_item_title"), table_name="item")
+    op.drop_index(op.f("ix_item_id"), table_name="item")
+    op.drop_index(op.f("ix_item_description"), table_name="item")
+    op.drop_table("item")
+    op.drop_index(op.f("ix_user_id"), table_name="user")
+    op.drop_index(op.f("ix_user_full_name"), table_name="user")
+    op.drop_index(op.f("ix_user_email"), table_name="user")
+    op.drop_table("user")
+    # ### end Alembic commands ###