Add compare_type=True to Migrate constructor

web/migrations/versions/9d21b228d353_.py

+"""empty message
+
+Revision ID: 9d21b228d353
+Revises: 33ec4d09b4ca
+Create Date: 2020-07-15 08:58:59.062442
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '9d21b228d353'
+down_revision = '33ec4d09b4ca'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('corpus_files', 'author',
+               existing_type=sa.VARCHAR(length=64),
+               type_=sa.String(length=255),
+               existing_nullable=True)
+    op.alter_column('corpus_files', 'title',
+               existing_type=sa.VARCHAR(length=64),
+               type_=sa.String(length=255),
+               existing_nullable=True)
+    op.alter_column('roles', 'permissions',
+               existing_type=sa.INTEGER(),
+               type_=sa.BigInteger(),
+               existing_nullable=True)
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('roles', 'permissions',
+               existing_type=sa.BigInteger(),
+               type_=sa.INTEGER(),
+               existing_nullable=True)
+    op.alter_column('corpus_files', 'title',
+               existing_type=sa.String(length=255),
+               type_=sa.VARCHAR(length=64),
+               existing_nullable=True)
+    op.alter_column('corpus_files', 'author',
+               existing_type=sa.String(length=255),
+               type_=sa.VARCHAR(length=64),
+               existing_nullable=True)
+    # ### end Alembic commands ###

web/nopaque.py

@@ -8,7 +8,7 @@ from flask_migrate import Migrate, upgrade
 import os
 
 app = create_app(os.getenv('FLASK_CONFIG') or 'default')
-migrate = Migrate(app, db)
+migrate = Migrate(app, db, compare_type=True)
 
 
 @app.shell_context_processor