Fix a number of alembic migration so they also work with mariadb

Signed-off-by: Pierre-Yves Chibon <pingou@pingoured.fr>

alembic/versions/2b1743f77436_cascade_deleting_flags_when_tokens_are_.py

@@ -20,7 +20,9 @@ def upgrade():
     re-create it with CASCADE on delete and update.
     """
     # alter the constraints
-    op.drop_constraint('pull_request_flags_token_id_fkey', 'pull_request_flags')
+    op.drop_constraint(
+        'pull_request_flags_token_id_fkey', 'pull_request_flags',
+        type_='foreignkey')
     op.create_foreign_key(
         u'pull_request_flags_token_id_fkey',
         'pull_request_flags',
@@ -36,7 +38,9 @@ def downgrade():
     """ Remove the existing foreign key in pull_request_flags.token_id and
     re-create it with without specifying the behavior on delete and update.
     """
-    op.drop_constraint('pull_request_flags_token_id_fkey', 'pull_request_flags')
+    op.drop_constraint(
+        'pull_request_flags_token_id_fkey', 'pull_request_flags',
+        type_='foreignkey')
     op.create_foreign_key(
         u'pull_request_flags_token_id_fkey',
         'pull_request_flags',

alembic/versions/6a3ed02ee160_new_api_token_internal_access_acl.py

@@ -17,8 +17,8 @@ down_revision = '9cb4580e269a'
 def upgrade():
     """ Insert the new ACL into the database. """
     op.execute(
-        'INSERT INTO acls ("name", "description", "created") '
-        "VALUES ('internal_access', 'Access Pagure''s internal APIs', NOW());"
+        'INSERT INTO acls (name, description, created) '
+        'VALUES ("internal_access", "Access Pagure internal APIs", NOW());'
     )
 
 

alembic/versions/9cb4580e269a_add_date_updated_to_commit_flags.py

@@ -30,7 +30,7 @@ def upgrade():
     )
     op.execute('UPDATE commit_flags SET date_updated=date_created')
     op.alter_column(
-        'commit_flags', 'date_updated',
+        'commit_flags', 'date_updated', existing_type=sa.DateTime,
         nullable=False, existing_nullable=True)
 
 

alembic/versions/e3cc5aedb8bb_add_date_updated_to_pr_flags.py

@@ -29,7 +29,7 @@ def upgrade():
     )
     op.execute('UPDATE pull_request_flags SET date_updated=date_created')
     op.alter_column(
-        'pull_request_flags', 'date_updated',
+        'pull_request_flags', 'date_updated', existing_type=sa.DateTime,
         nullable=False, existing_nullable=True)