forgot the migration.

migrations/versions/23c62c933848_.py

@@ -0,0 +1,34 @@
+"""empty message
+
+Revision ID: 23c62c933848
+Revises: 9b43e725f39c
+Create Date: 2020-05-28 10:30:49.409760
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '23c62c933848'
+down_revision = '9b43e725f39c'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('file_study_id_fkey', 'file', type_='foreignkey')
+    op.drop_column('file', 'task_id')
+    op.drop_column('file', 'study_id')
+    op.drop_column('file', 'form_field_key')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('file', sa.Column('form_field_key', sa.VARCHAR(), autoincrement=False, nullable=True))
+    op.add_column('file', sa.Column('study_id', sa.INTEGER(), autoincrement=False, nullable=True))
+    op.add_column('file', sa.Column('task_id', sa.VARCHAR(), autoincrement=False, nullable=True))
+    op.create_foreign_key('file_study_id_fkey', 'file', 'study', ['study_id'], ['id'])
+    # ### end Alembic commands ###