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      Questions tagged [alembic]

      Alembic is a lightweight database migration tool for usage with the SQLAlchemy Database Toolkit for Python.

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      Alembic autogenerate not detecting current state

      Problem I'm using Alembic autogenerate to migrate some model changes. I run alembic revision/upgrade once and it properly creates my table and adds an alembic_version table to my database. When I go ...
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      How can multiple engineers work on same DB with alembic?

      We have a few engineers all working on the same database. When one runs alembic revision -m 'name' We get FAILED: Multiple heads are present; please specify the head revision on which the new revision ...
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      Alembic generating alter columns same as models

      I'm working on a legacy multi-tenant postgres database. And now we are mapping to clean SQLAlchemy new code. I'm using alembic to generate the new migrations operations(until now are just SQL scripts)....
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      SQLalchemy cant find my tables, but alembic finds them just fine

      I'm starting a project with SQLAlchemy and Alembic. I'm using SQLite for testing purposes. When I execute alembic revision --autogenerate -m "..." it correctly generates the migrations and ...
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      Model class not changed after an Alembic Migration

      I am new to Alembic and SQLalchemy. I created a pretty simple table in postgres and created a relational mapping in SQLAlchemy with class User engine = create_engine(DATABASE_URL) Base = ...
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      VARCHAR length error when using StringEncryptedType, SQLAlchemy

      I have the following model: from enum import Enum from sqlalchemy_utils.types.encrypted.encrypted_type import StringEncryptedType from sqlalchemy import ( Column, Integer, Float, Enum ...
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      20 views

      Cross reference while defining FK and children relationships SQLAlchemy

      Class Bed id Class Guest id bed_assignments = relationship( primaryjoin=( "and_(Guest.id" "==foreign(BedAssignment.guest_id)," ...
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      24 views

      Alembic Python Question: How to get value from arbGeomParams?

      This is probably an easy question. I'm new to alembic python and not a hardcore programmer, I'm trying to get the string value of an alembic attribute added to a sphereShape cached from from maya. I ...
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      79 views

      Alembic ignore specific tables

      I'm using alembic to manage database migrations as per user defined sqlalchemy models. My challenge is that I'd like for alembic to ignore any creation, deletion, or changes to a specific set of ...
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      1answer
      20 views

      SQLAlchemy not updating changes causing issues

      So I've made some changes to my schema on a Flask Server, using SQLite and SQLAlchemy. The database is generally functional and I'm able to add some of the models, as well as update and query all ...
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      10 views

      When I create a Foreign key, can Alembic auto deletes rows violates the constraint?

      I'm upgrading a database on postgresql, with a new foreign key constraint. When I create it with alembic, I meet this error: sqlalchemy.exc.IntegrityError: (psycopg2.errors.ForeignKeyViolation) insert ...
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      14 views

      flask-migrate stuck on downgrade with table containing Enum field

      I have defined the following models using sqlalchemy and my database backend is mysql. from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy() class Vehicle(db.Model): id = db.Column(db....
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      23 views

      sqlalchemy - flask table not defined

      I'm using Flask + sqlalchemy with sqlite3 (not flask-sqlalchemy), with alembic for migrations. I have setup migrations and I can see the table created, I've examined the database and confirmed the ...
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      45 views

      alembic.util.exc.CommandError: Can't locate revision identified by 'f1942fde9843'

      This happens when I do flask db migrate on my production PostgreSQL database. Locally, migrate works fine (also PostgreSQL). I'm not sure what's wrong. Some info: f1942fde9843 is not in my migrations/...
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      How can I check that the a database is aligned with alembic head [duplicate]

      I have a automated test script and before I run the tests I want to be sure that the alembic version is matching my current test database version and if not then I would like to reinitialize my test ...

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