Add migration for Planet

alembic/versions/20250325_130505_4bf2ca14_create_planet.py

@@ -0,0 +1,52 @@
+"""create planets table
+
+Revision ID: 1234567890ab
+Revises: 
+Create Date: 2023-05-25 10:00:00.000000
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.sql import func
+
+# revision identifiers, used by Alembic
+revision = '1234567890ab'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # Create planets table
+    op.create_table(
+        'planets',
+        sa.Column('id', sa.Integer, primary_key=True, index=True),
+        sa.Column('name', sa.String, unique=True, nullable=False),
+        sa.Column('description', sa.String, nullable=True),
+        sa.Column('diameter', sa.Integer, nullable=False),
+        sa.Column('mass', sa.Integer, nullable=False),
+        sa.Column('distance_from_sun', sa.Integer, nullable=False),
+        sa.Column('created_at', sa.Integer, default=func.now()),
+        sa.Column('updated_at', sa.Integer, default=func.now())
+    )
+
+
+def downgrade():
+    # Drop planets table
+    op.drop_table('planets')
+```
+
+This Alembic migration script creates a new table named 'planets' with the following columns:
+
+- `id` (Integer, Primary Key, Indexed)
+- `name` (String, Unique, Not Nullable)
+- `description` (String, Nullable)
+- `diameter` (Integer, Not Nullable)
+- `mass` (Integer, Not Nullable)
+- `distance_from_sun` (Integer, Not Nullable)
+- `created_at` (Integer, Default value from `func.now()`)
+- `updated_at` (Integer, Default value from `func.now()`)
+
+The `upgrade()` function creates the table using the `op.create_table()` operation, while the `downgrade()` function drops the table using `op.drop_table()`.
+
+Note that the revision ID, revision identifiers, and create date are included as comments at the top of the script.