make sure alembic migration works in both directions

backend/alembic/versions/2022_12_30_2054-abb47e9d145a_name_changes_person_user_post_message_.py

@@ -22,6 +22,7 @@ def upgrade() -> None:
     # clear DB
     op.execute("DELETE FROM journal;")
     op.execute("DELETE FROM work_package;")
+    op.execute("DELETE FROM post_reaction;")
     op.execute("DELETE FROM post;")
     op.execute("DELETE FROM person_stats;")
     op.execute("DELETE FROM person;")
@@ -175,24 +176,37 @@ def upgrade() -> None:
 
 
 def downgrade() -> None:
+    # clear DB
+    op.execute("DELETE FROM journal;")
+    op.execute("DELETE FROM message_reaction;")
+    op.execute("DELETE FROM task;")
+    op.execute("DELETE FROM message;")
+    op.execute("DELETE FROM user_stats;")
+    op.execute('DELETE FROM "user";')
+    op.execute("DELETE FROM text_labels;")
+
     # ### commands auto generated by Alembic - please adjust! ###
     op.add_column("text_labels", sa.Column("post_id", postgresql.UUID(), autoincrement=False, nullable=True))
-    op.drop_constraint(None, "text_labels", type_="foreignkey")
-    op.create_foreign_key("text_labels_post_id_fkey", "text_labels", "post", ["post_id"], ["id"])
+    op.drop_constraint("text_labels_message_id_fkey", "text_labels", type_="foreignkey")
+
     op.drop_column("text_labels", "message_id")
     op.add_column("journal", sa.Column("post_id", postgresql.UUID(), autoincrement=False, nullable=True))
     op.add_column("journal", sa.Column("person_id", postgresql.UUID(), autoincrement=False, nullable=True))
-    op.drop_constraint(None, "journal", type_="foreignkey")
-    op.drop_constraint(None, "journal", type_="foreignkey")
-    op.create_foreign_key("journal_person_id_fkey", "journal", "person", ["person_id"], ["id"])
-    op.create_foreign_key("journal_post_id_fkey", "journal", "post", ["post_id"], ["id"])
+    op.drop_constraint("journal_message_id_fkey", "journal", type_="foreignkey")
+    op.drop_constraint("journal_user_id_fkey", "journal", type_="foreignkey")
+
     op.drop_index(op.f("ix_journal_user_id"), table_name="journal")
     op.create_index("ix_journal_person_id", "journal", ["person_id"], unique=False)
     op.drop_column("journal", "message_id")
     op.drop_column("journal", "user_id")
+
     op.create_table(
-        "post_reaction",
-        sa.Column("person_id", postgresql.UUID(), autoincrement=False, nullable=False),
+        "person",
+        sa.Column(
+            "id", postgresql.UUID(), server_default=sa.text("gen_random_uuid()"), autoincrement=False, nullable=False
+        ),
+        sa.Column("username", sa.VARCHAR(length=128), autoincrement=False, nullable=False),
+        sa.Column("display_name", sa.VARCHAR(length=256), autoincrement=False, nullable=False),
         sa.Column(
             "created_date",
             postgresql.TIMESTAMP(),
@@ -200,13 +214,10 @@ def downgrade() -> None:
             autoincrement=False,
             nullable=False,
         ),
-        sa.Column("payload_type", sa.VARCHAR(length=200), autoincrement=False, nullable=False),
-        sa.Column("payload", postgresql.JSONB(astext_type=sa.Text()), autoincrement=False, nullable=False),
         sa.Column("api_client_id", postgresql.UUID(), autoincrement=False, nullable=False),
-        sa.Column("work_package_id", postgresql.UUID(), autoincrement=False, nullable=False),
-        sa.ForeignKeyConstraint(["api_client_id"], ["api_client.id"], name="post_reaction_api_client_id_fkey"),
-        sa.ForeignKeyConstraint(["person_id"], ["person.id"], name="post_reaction_person_id_fkey"),
-        sa.ForeignKeyConstraint(["work_package_id"], ["work_package.id"], name="post_reaction_work_package_id_fkey"),
+        sa.Column("auth_method", sa.VARCHAR(length=128), autoincrement=False, nullable=False),
+        sa.ForeignKeyConstraint(["api_client_id"], ["api_client.id"], name="person_api_client_id_fkey"),
+        sa.PrimaryKeyConstraint("id", name="person_pkey"),
     )
     op.create_table(
         "person_stats",
@@ -289,13 +300,10 @@ def downgrade() -> None:
     op.create_index("ix_post_thread_id", "post", ["thread_id"], unique=False)
     op.create_index("ix_post_person_id", "post", ["person_id"], unique=False)
     op.create_index("ix_post_frontend_post_id", "post", ["api_client_id", "frontend_post_id"], unique=False)
+
     op.create_table(
-        "person",
-        sa.Column(
-            "id", postgresql.UUID(), server_default=sa.text("gen_random_uuid()"), autoincrement=False, nullable=False
-        ),
-        sa.Column("username", sa.VARCHAR(length=128), autoincrement=False, nullable=False),
-        sa.Column("display_name", sa.VARCHAR(length=256), autoincrement=False, nullable=False),
+        "post_reaction",
+        sa.Column("person_id", postgresql.UUID(), autoincrement=False, nullable=False),
         sa.Column(
             "created_date",
             postgresql.TIMESTAMP(),
@@ -303,13 +311,20 @@ def downgrade() -> None:
             autoincrement=False,
             nullable=False,
         ),
+        sa.Column("payload_type", sa.VARCHAR(length=200), autoincrement=False, nullable=False),
+        sa.Column("payload", postgresql.JSONB(astext_type=sa.Text()), autoincrement=False, nullable=False),
         sa.Column("api_client_id", postgresql.UUID(), autoincrement=False, nullable=False),
-        sa.Column("auth_method", sa.VARCHAR(length=128), autoincrement=False, nullable=False),
-        sa.ForeignKeyConstraint(["api_client_id"], ["api_client.id"], name="person_api_client_id_fkey"),
-        sa.PrimaryKeyConstraint("id", name="person_pkey"),
+        sa.Column("work_package_id", postgresql.UUID(), autoincrement=False, nullable=False),
+        sa.ForeignKeyConstraint(["api_client_id"], ["api_client.id"], name="post_reaction_api_client_id_fkey"),
+        sa.ForeignKeyConstraint(["person_id"], ["person.id"], name="post_reaction_person_id_fkey"),
+        sa.ForeignKeyConstraint(["work_package_id"], ["work_package.id"], name="post_reaction_work_package_id_fkey"),
     )
 
     op.create_index("ix_person_username", "person", ["api_client_id", "username", "auth_method"], unique=False)
+    op.create_foreign_key("text_labels_post_id_fkey", "text_labels", "post", ["post_id"], ["id"])
+    op.create_foreign_key("journal_person_id_fkey", "journal", "person", ["person_id"], ["id"])
+    op.create_foreign_key("journal_post_id_fkey", "journal", "post", ["post_id"], ["id"])
+
     op.drop_table("message_reaction")
     op.drop_table("user_stats")
     op.drop_index(op.f("ix_task_user_id"), table_name="task")