4 files changed, 214 insertions, 0 deletions

diff --git a/alembic/README b/alembic/README
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+++ b/alembic/README
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+Generic single-database configuration.
\ No newline at end of file
diff --git a/alembic/env.py b/alembic/env.py
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+++ b/alembic/env.py
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+from logging.config import fileConfig
+
+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
+# from myapp import mymodel
+# target_metadata = mymodel.Base.metadata
+from app import Base
+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()
diff --git a/alembic/script.py.mako b/alembic/script.py.mako
new file mode 100644
index 0000000..55df286
--- /dev/null
+++ b/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() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}
diff --git a/alembic/versions/4a3773e332a0_use_utc_datetime_in_db.py.old b/alembic/versions/4a3773e332a0_use_utc_datetime_in_db.py.old
new file mode 100644
index 0000000..e011a3a
--- /dev/null
+++ b/alembic/versions/4a3773e332a0_use_utc_datetime_in_db.py.old
@@ -0,0 +1,110 @@
+"""use UTC DateTime in DB
+
+Revision ID: 4a3773e332a0
+Revises: 
+Create Date: 2022-11-15 17:35:11.717714
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '4a3773e332a0'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+	# ### commands auto generated by Alembic - please adjust! ###
+	op.add_column('borrows', sa.Column('purchase_utc', sa.DateTime(), nullable=True))
+	op.add_column('borrows', sa.Column('expiration_utc', sa.DateTime(), nullable=True))
+	op.add_column('borrows', sa.Column('purchase_timezone', sa.Integer(), nullable=True))
+	op.add_column('borrows', sa.Column('expiration_timezone', sa.Integer(), nullable=True))
+	borrows = sa.Table(
+		"borrows",
+		sa.MetaData(),
+		sa.Column("id", sa.Integer, primary_key=True, nullable=False),
+		sa.Column("purchase", sa.String, nullable=True),
+		sa.Column("expiration", sa.String, nullable=True),
+		sa.Column("purchase_utc", sa.DateTime, nullable=True),
+		sa.Column("expiration_utc", sa.DateTime, nullable=True),
+		sa.Column("purchase_timezone", sa.Integer, nullable=True),
+		sa.Column("expiration_timezone", sa.Integer, nullable=True)
+	)
+	connection = op.get_bind()
+	results = connection.execute(sa.select([
+		borrows.c.id,
+		borrows.c.purchase,
+		borrows.c.expiration,
+		borrows.c.purchase_utc,
+		borrows.c.expiration_utc,
+		borrows.c.purchase_timezone,
+		borrows.c.expiration_timezone
+	])).fetchall()
+	from datetime import datetime, timezone
+	for id, purchase, expiration, purchase_utc, expiration_utc, purchase_timezone, expiration_timezone in results:
+		if id % 1000 == 0:
+			print(f"... obdelujem id {id}", end="\r")
+		if purchase == None:
+			print(f"at id {id} purchase is None")
+			continue
+		purchase_utc = datetime.strptime(purchase, "%Y-%m-%dT%H:%M:%S%z")
+		expiration_utc = datetime.strptime(expiration, "%Y-%m-%dT%H:%M:%S%z")
+		purchase_timezone = purchase_utc.tzinfo.utcoffset(None).seconds
+		expiration_timezone = expiration_utc.tzinfo.utcoffset(None).seconds
+		purchase_utc = purchase_utc.astimezone(timezone.utc).replace(tzinfo=None)
+		expiration_utc = expiration_utc.astimezone(timezone.utc).replace(tzinfo=None)
+		connection.execute(borrows.update().where(borrows.c.id == id).values(
+			purchase_utc = purchase_utc,
+			expiration_utc = expiration_utc,
+			purchase_timezone = purchase_timezone,
+			expiration_timezone = expiration_timezone
+		))
+	op.drop_column('borrows', 'expiration')
+	op.drop_column('borrows', 'purchase')
+	# ### end Alembic commands ###
+
+
+def downgrade() -> None:
+	# ### commands auto generated by Alembic - please adjust! ###
+	op.add_column('borrows', sa.Column('purchase', sa.VARCHAR(), nullable=True))
+	op.add_column('borrows', sa.Column('expiration', sa.VARCHAR(), nullable=True))
+	borrows = sa.Table(
+		"borrows",
+		sa.MetaData(),
+		sa.Column("id", sa.Integer, primary_key=True, nullable=False),
+		sa.Column("purchase", sa.String, nullable=True),
+		sa.Column("expiration", sa.String, nullable=True),
+		sa.Column("purchase_utc", sa.DateTime, nullable=True),
+		sa.Column("expiration_utc", sa.DateTime, nullable=True),
+		sa.Column("purchase_timezone", sa.Integer, nullable=True),
+		sa.Column("expiration_timezone", sa.Integer, nullable=True)
+	)
+	connection = op.get_bind()
+	results = connection.execute(sa.select([
+		borrows.c.id,
+		borrows.c.purchase,
+		borrows.c.expiration,
+		borrows.c.purchase_utc,
+		borrows.c.expiration_utc,
+		borrows.c.purchase_timezone,
+		borrows.c.expiration_timezone
+	])).fetchall()
+	from datetime import datetime, timezone, timedelta
+	for id, purchase, expiration, purchase_utc, expiration_utc, purchase_timezone, expiration_timezone in results:
+		if id % 1000 == 0:
+			print(f"... obdelujem id {id}", end="\r")
+		if purchase_utc == None:
+			print(f"at id {id} purchase_utc is None")
+			continue
+		connection.execute(borrows.update().where(borrows.c.id == id).values(
+			purchase = purchase_utc.astimezone(timezone(timedelta(seconds=purchase_timezone))).isoformat(),
+			expiration = expiration_utc.astimezone(timezone(timedelta(seconds=expiration_timezone))).isoformat()
+		))
+	op.drop_column('borrows', 'expiration_timezone')
+	op.drop_column('borrows', 'purchase_timezone')
+	op.drop_column('borrows', 'expiration_utc')
+	op.drop_column('borrows', 'purchase_utc')
+	# ### end Alembic commands ###