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b295b033364d_add_ondelete_cascade_to_foreign_keys.py
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"""Add ondelete cascade to foreign keys
Revision ID: b295b033364d
Revises: b5551cd26764
Create Date: 2019-05-03 19:26:57.746887
"""
from alembic import op
# revision identifiers, used by Alembic.
revision = "b295b033364d"
down_revision = "b5551cd26764"
branch_labels = None
depends_on = None
def upgrade():
bind = op.get_bind()
url = str(bind.engine.url)
if url.startswith("mysql"):
op.drop_constraint("awards_ibfk_1", "awards", type_="foreignkey")
op.drop_constraint("awards_ibfk_2", "awards", type_="foreignkey")
op.create_foreign_key(
"awards_ibfk_1", "awards", "teams", ["team_id"], ["id"], ondelete="CASCADE"
)
op.create_foreign_key(
"awards_ibfk_2", "awards", "users", ["user_id"], ["id"], ondelete="CASCADE"
)
op.drop_constraint("files_ibfk_1", "files", type_="foreignkey")
op.create_foreign_key(
"files_ibfk_1",
"files",
"challenges",
["challenge_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("flags_ibfk_1", "flags", type_="foreignkey")
op.create_foreign_key(
"flags_ibfk_1",
"flags",
"challenges",
["challenge_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("hints_ibfk_1", "hints", type_="foreignkey")
op.create_foreign_key(
"hints_ibfk_1",
"hints",
"challenges",
["challenge_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("tags_ibfk_1", "tags", type_="foreignkey")
op.create_foreign_key(
"tags_ibfk_1",
"tags",
"challenges",
["challenge_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("team_captain_id", "teams", type_="foreignkey")
op.create_foreign_key(
"team_captain_id",
"teams",
"users",
["captain_id"],
["id"],
ondelete="SET NULL",
)
op.drop_constraint("tracking_ibfk_1", "tracking", type_="foreignkey")
op.create_foreign_key(
"tracking_ibfk_1",
"tracking",
"users",
["user_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("unlocks_ibfk_1", "unlocks", type_="foreignkey")
op.drop_constraint("unlocks_ibfk_2", "unlocks", type_="foreignkey")
op.create_foreign_key(
"unlocks_ibfk_1",
"unlocks",
"teams",
["team_id"],
["id"],
ondelete="CASCADE",
)
op.create_foreign_key(
"unlocks_ibfk_2",
"unlocks",
"users",
["user_id"],
["id"],
ondelete="CASCADE",
)
elif url.startswith("postgres"):
op.drop_constraint("awards_team_id_fkey", "awards", type_="foreignkey")
op.drop_constraint("awards_user_id_fkey", "awards", type_="foreignkey")
op.create_foreign_key(
"awards_team_id_fkey",
"awards",
"teams",
["team_id"],
["id"],
ondelete="CASCADE",
)
op.create_foreign_key(
"awards_user_id_fkey",
"awards",
"users",
["user_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("files_challenge_id_fkey", "files", type_="foreignkey")
op.create_foreign_key(
"files_challenge_id_fkey",
"files",
"challenges",
["challenge_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("flags_challenge_id_fkey", "flags", type_="foreignkey")
op.create_foreign_key(
"flags_challenge_id_fkey",
"flags",
"challenges",
["challenge_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("hints_challenge_id_fkey", "hints", type_="foreignkey")
op.create_foreign_key(
"hints_challenge_id_fkey",
"hints",
"challenges",
["challenge_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("tags_challenge_id_fkey", "tags", type_="foreignkey")
op.create_foreign_key(
"tags_challenge_id_fkey",
"tags",
"challenges",
["challenge_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("team_captain_id", "teams", type_="foreignkey")
op.create_foreign_key(
"team_captain_id",
"teams",
"users",
["captain_id"],
["id"],
ondelete="SET NULL",
)
op.drop_constraint("tracking_user_id_fkey", "tracking", type_="foreignkey")
op.create_foreign_key(
"tracking_user_id_fkey",
"tracking",
"users",
["user_id"],
["id"],
ondelete="CASCADE",
)
op.drop_constraint("unlocks_team_id_fkey", "unlocks", type_="foreignkey")
op.drop_constraint("unlocks_user_id_fkey", "unlocks", type_="foreignkey")
op.create_foreign_key(
"unlocks_team_id_fkey",
"unlocks",
"teams",
["team_id"],
["id"],
ondelete="CASCADE",
)
op.create_foreign_key(
"unlocks_user_id_fkey",
"unlocks",
"users",
["user_id"],
["id"],
ondelete="CASCADE",
)
def downgrade():
bind = op.get_bind()
url = str(bind.engine.url)
if url.startswith("mysql"):
op.drop_constraint("unlocks_ibfk_1", "unlocks", type_="foreignkey")
op.drop_constraint("unlocks_ibfk_2", "unlocks", type_="foreignkey")
op.create_foreign_key("unlocks_ibfk_1", "unlocks", "teams", ["team_id"], ["id"])
op.create_foreign_key("unlocks_ibfk_2", "unlocks", "users", ["user_id"], ["id"])
op.drop_constraint("tracking_ibfk_1", "tracking", type_="foreignkey")
op.create_foreign_key(
"tracking_ibfk_1", "tracking", "users", ["user_id"], ["id"]
)
op.drop_constraint("team_captain_id", "teams", type_="foreignkey")
op.create_foreign_key(
"team_captain_id", "teams", "users", ["captain_id"], ["id"]
)
op.drop_constraint("tags_ibfk_1", "tags", type_="foreignkey")
op.create_foreign_key(
"tags_ibfk_1", "tags", "challenges", ["challenge_id"], ["id"]
)
op.drop_constraint("hints_ibfk_1", "hints", type_="foreignkey")
op.create_foreign_key(
"hints_ibfk_1", "hints", "challenges", ["challenge_id"], ["id"]
)
op.drop_constraint("flags_ibfk_1", "flags", type_="foreignkey")
op.create_foreign_key(
"flags_ibfk_1", "flags", "challenges", ["challenge_id"], ["id"]
)
op.drop_constraint("files_ibfk_1", "files", type_="foreignkey")
op.create_foreign_key(
"files_ibfk_1", "files", "challenges", ["challenge_id"], ["id"]
)
op.drop_constraint("awards_ibfk_1", "awards", type_="foreignkey")
op.drop_constraint("awards_ibfk_2", "awards", type_="foreignkey")
op.create_foreign_key("awards_ibfk_1", "awards", "teams", ["team_id"], ["id"])
op.create_foreign_key("awards_ibfk_2", "awards", "users", ["user_id"], ["id"])
elif url.startswith("postgres"):
op.drop_constraint("unlocks_team_id_fkey", "unlocks", type_="foreignkey")
op.drop_constraint("unlocks_user_id_fkey", "unlocks", type_="foreignkey")
op.create_foreign_key(
"unlocks_team_id_fkey", "unlocks", "teams", ["team_id"], ["id"]
)
op.create_foreign_key(
"unlocks_user_id_fkey", "unlocks", "users", ["user_id"], ["id"]
)
op.drop_constraint("tracking_user_id_fkey", "tracking", type_="foreignkey")
op.create_foreign_key(
"tracking_user_id_fkey", "tracking", "users", ["user_id"], ["id"]
)
op.drop_constraint("team_captain_id", "teams", type_="foreignkey")
op.create_foreign_key(
"team_captain_id", "teams", "users", ["captain_id"], ["id"]
)
op.drop_constraint("tags_challenge_id_fkey", "tags", type_="foreignkey")
op.create_foreign_key(
"tags_challenge_id_fkey", "tags", "challenges", ["challenge_id"], ["id"]
)
op.drop_constraint("hints_challenge_id_fkey", "hints", type_="foreignkey")
op.create_foreign_key(
"hints_challenge_id_fkey", "hints", "challenges", ["challenge_id"], ["id"]
)
op.drop_constraint("flags_challenge_id_fkey", "flags", type_="foreignkey")
op.create_foreign_key(
"flags_challenge_id_fkey", "flags", "challenges", ["challenge_id"], ["id"]
)
op.drop_constraint("files_challenge_id_fkey", "files", type_="foreignkey")
op.create_foreign_key(
"files_challenge_id_fkey", "files", "challenges", ["challenge_id"], ["id"]
)
op.drop_constraint("awards_team_id_fkey", "awards", type_="foreignkey")
op.drop_constraint("awards_user_id_fkey", "awards", type_="foreignkey")
op.create_foreign_key(
"awards_team_id_fkey", "awards", "teams", ["team_id"], ["id"]
)
op.create_foreign_key(
"awards_user_id_fkey", "awards", "users", ["user_id"], ["id"]
)