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from pydantic.main import BaseModel
from beanie import Document, iterative_migration
class OldTag(BaseModel):
color: str
name: str
class Tag(BaseModel):
color: str
title: str
class OldNote(Document):
title: str
tag: OldTag
class Settings:
name = "notes"
class Note(Document):
title: str
tag: Tag
class Settings:
name = "notes"
class Forward:
@iterative_migration()
async def change_color(
self, input_document: OldNote, output_document: Note
):
output_document.tag.title = input_document.tag.name
class Backward:
@iterative_migration()
async def change_title(
self, input_document: Note, output_document: OldNote
):
output_document.tag.name = input_document.tag.title
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