feat: add ability to run db migrations

This commit is contained in:
Jun Siang Cheah 2024-04-01 11:12:46 +01:00 committed by Timothy J. Baek
parent 7978adbf45
commit 151055590d
4 changed files with 175 additions and 1 deletions

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@ -1,4 +1,5 @@
from peewee import *
from peewee_migrate import Router
from config import SRC_LOG_LEVELS, DATA_DIR
import os
import logging
@ -16,4 +17,6 @@ else:
DB = SqliteDatabase(f"{DATA_DIR}/webui.db")
DB.connect()
router = Router(DB, migrate_dir="apps/web/internal/migrations", logger=log)
router.run()
DB.connect(reuse_if_open=True)

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"""Peewee migrations -- 001_initial_schema.py.
Some examples (model - class or model name)::
> Model = migrator.orm['table_name'] # Return model in current state by name
> Model = migrator.ModelClass # Return model in current state by name
> migrator.sql(sql) # Run custom SQL
> migrator.run(func, *args, **kwargs) # Run python function with the given args
> migrator.create_model(Model) # Create a model (could be used as decorator)
> migrator.remove_model(model, cascade=True) # Remove a model
> migrator.add_fields(model, **fields) # Add fields to a model
> migrator.change_fields(model, **fields) # Change fields
> migrator.remove_fields(model, *field_names, cascade=True)
> migrator.rename_field(model, old_field_name, new_field_name)
> migrator.rename_table(model, new_table_name)
> migrator.add_index(model, *col_names, unique=False)
> migrator.add_not_null(model, *field_names)
> migrator.add_default(model, field_name, default)
> migrator.add_constraint(model, name, sql)
> migrator.drop_index(model, *col_names)
> migrator.drop_not_null(model, *field_names)
> migrator.drop_constraints(model, *constraints)
"""
from contextlib import suppress
import peewee as pw
from peewee_migrate import Migrator
with suppress(ImportError):
import playhouse.postgres_ext as pw_pext
def migrate(migrator: Migrator, database: pw.Database, *, fake=False):
"""Write your migrations here."""
@migrator.create_model
class Auth(pw.Model):
id = pw.CharField(max_length=255, unique=True)
email = pw.CharField(max_length=255)
password = pw.CharField(max_length=255)
active = pw.BooleanField()
class Meta:
table_name = "auth"
@migrator.create_model
class Chat(pw.Model):
id = pw.CharField(max_length=255, unique=True)
user_id = pw.CharField(max_length=255)
title = pw.CharField(max_length=255)
chat = pw.TextField()
timestamp = pw.DateField()
class Meta:
table_name = "chat"
@migrator.create_model
class ChatIdTag(pw.Model):
id = pw.CharField(max_length=255, unique=True)
tag_name = pw.CharField(max_length=255)
chat_id = pw.CharField(max_length=255)
user_id = pw.CharField(max_length=255)
timestamp = pw.DateField()
class Meta:
table_name = "chatidtag"
@migrator.create_model
class Document(pw.Model):
id = pw.AutoField()
collection_name = pw.CharField(max_length=255, unique=True)
name = pw.CharField(max_length=255, unique=True)
title = pw.CharField(max_length=255)
filename = pw.CharField(max_length=255)
content = pw.TextField(null=True)
user_id = pw.CharField(max_length=255)
timestamp = pw.DateField()
class Meta:
table_name = "document"
@migrator.create_model
class Modelfile(pw.Model):
id = pw.AutoField()
tag_name = pw.CharField(max_length=255, unique=True)
user_id = pw.CharField(max_length=255)
modelfile = pw.TextField()
timestamp = pw.DateField()
class Meta:
table_name = "modelfile"
@migrator.create_model
class Prompt(pw.Model):
id = pw.AutoField()
command = pw.CharField(max_length=255, unique=True)
user_id = pw.CharField(max_length=255)
title = pw.CharField(max_length=255)
content = pw.TextField()
timestamp = pw.DateField()
class Meta:
table_name = "prompt"
@migrator.create_model
class Tag(pw.Model):
id = pw.CharField(max_length=255, unique=True)
name = pw.CharField(max_length=255)
user_id = pw.CharField(max_length=255)
data = pw.TextField(null=True)
class Meta:
table_name = "tag"
@migrator.create_model
class User(pw.Model):
id = pw.CharField(max_length=255, unique=True)
name = pw.CharField(max_length=255)
email = pw.CharField(max_length=255)
role = pw.CharField(max_length=255)
profile_image_url = pw.CharField(max_length=255)
timestamp = pw.DateField()
class Meta:
table_name = "user"
def rollback(migrator: Migrator, database: pw.Database, *, fake=False):
"""Write your rollback migrations here."""
migrator.remove_model("user")
migrator.remove_model("tag")
migrator.remove_model("prompt")
migrator.remove_model("modelfile")
migrator.remove_model("document")
migrator.remove_model("chatidtag")
migrator.remove_model("chat")
migrator.remove_model("auth")

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# Database Migrations
This directory contains all the database migrations for the web app.
Migrations are done using the [`peewee-migrate`](https://github.com/klen/peewee_migrate) library.
Migrations are automatically ran at app startup.
## Creating a migration
Have you made a change to the schema of an existing model?
You will need to create a migration file to ensure that existing databases are updated for backwards compatibility.
1. Have a database file (`webui.db`) that has the old schema prior to any of your changes.
2. Make your changes to the models.
3. From the `backend` directory, run the following command:
```bash
pw_migrate create --auto --auto-source apps.web.models --database sqlite:///${SQLITE_DB} --directory apps/web/internal/migrations ${MIGRATION_NAME}
```
- `$SQLITE_DB` should be the path to the database file.
- `$MIGRATION_NAME` should be a descriptive name for the migration.
4. The migration file will be created in the `apps/web/internal/migrations` directory.

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@ -14,6 +14,7 @@ uuid
requests
aiohttp
peewee
peewee-migrate
bcrypt
litellm==1.30.7