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1. Alembic sqlite drop column error how to#
2. Alembic sqlite drop column error update#
3. Alembic sqlite drop column error upgrade#
4. Alembic sqlite drop column error full#

Alembic sqlite drop column error full#

I’ve kept it as one file below, but I highly recommend seeing the full example in the docs, where it’s separated into different files) (Update: since I first wrote this, FastAPI-Users has made some fairly significant changes that make it much more flexible, but require a bit more setup. $ poetry add alembic=1.7.7 Creating the FastAPI App You should consider what versions you want your project to be compatible with when adding your dependencies. For the sake of this tutorial, I’ll be pinning specific version numbers. Adding Dependenciesįirst of all, let’s add our dependencies to our Poetry project. Start by running poetry new or poetry init to start a new project. I’ll be using a SQLite database in the examples, because it’s readily available in Python, it’s a good database, and it will illustrate one of Alembic’s features.

Alembic sqlite drop column error how to#

This article will cover how to get started with FastAPI-Users and Alembic in a Poetry project. Alembic is a tool, used alongside SQLAlchemy, that helps manage database migrations. In an actively developed project, though, your database is likely to go through many changes over time. When setting up your database, you can use SQLAlchemy (or your preferred ORM), plus the provided models, to create the necessary tables very quickly–as you can see from the example in the docs, it doesn’t take much to get everything you need. It comes with support for various ORMs, and contains all the models, dependencies, and routes you need for registration, activation, email verification, and more.

and here's the class I wrote: from sqlalchemy import Column, Integer, UniqueConstraint, ForeignKe圜onstraint, Indexįrom -Users is a user registration and authentication system that makes adding user accounts to your FastAPI project easier and secure-by-default. ) ENGINE=InnoDB AUTO_INCREMENT=101 DEFAULT CHARSET=utf8

Alembic sqlite drop column error update#

KEY `vndr_prod_tp_cat_category_fk_idx` (`magento_category_id`),ĬONSTRAINT `vndr_prod_tp_cat_magento_category_fk` FOREIGN KEY (`magento_category_id`) REFERENCES `magento_categories` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION,ĬONSTRAINT `vndr_prod_tp_cat_product_type_fk` FOREIGN KEY (`vendor_product_type_id`) REFERENCES `vendor_product_types` (`id`) ON DELETE NO ACTION ON UPDATE NO ACTION UNIQUE KEY `vendor_product_types_magento_categories_uq` (`vendor_product_type_id`,`magento_category_id`,`sequence`), `updated_at` timestamp NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP, `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `magento_category_id` bigint(20) unsigned NOT NULL, `vendor_product_type_id` bigint(20) unsigned NOT NULL, `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT, here's the DDL for the table as it exists in MySQL: CREATE TABLE `vendor_product_types_magento_categories` ( 'vendor_product_types_magento_categories', In the downgrade method: op.create_index( Table_name='vendor_product_types_magento_categories'

Alembic sqlite drop column error upgrade#

Here's the pertinent part of what is in the upgrade method: op.drop_index(

Plus, if I don't reconcile the class to the database this will likely come up every time I auto-generate migrations. I'm completely at a loss as to why the migration is continually trying to drop and re-create this index, which, if I leave in the migration I'll wager is going to fail anyway. I've gotten to the point where Alembic is comparing existing objects in the database against the declarative classes I've made, and there's one pesky index (for a foreign key) that Alembic refuses to leave in-place in my initial migration.

Total newbie to Alembic, SQLAlchemy, and Python.