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https://github.com/eitchtee/WYGIWYH.git
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52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
# Generated by Django 5.2.5 on 2025-08-17 06:25
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from django.db import migrations
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# The new value we are migrating to
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NEW_SERVICE_TYPE = "frankfurter"
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# The old values we are deprecating
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OLD_SERVICE_TYPE_TO_UPDATE = "synth_finance"
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OLD_SERVICE_TYPE_TO_DELETE = "synth_finance_stock"
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def forwards_func(apps, schema_editor):
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"""
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Forward migration:
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- Deletes all ExchangeRateService instances with service_type 'synth_finance_stock'.
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- Updates all ExchangeRateService instances with service_type 'synth_finance' to 'frankfurter'.
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"""
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ExchangeRateService = apps.get_model("currencies", "ExchangeRateService")
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db_alias = schema_editor.connection.alias
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# 1. Delete the SYNTH_FINANCE_STOCK entries
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ExchangeRateService.objects.using(db_alias).filter(
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service_type=OLD_SERVICE_TYPE_TO_DELETE
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).delete()
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# 2. Update the SYNTH_FINANCE entries to FRANKFURTER
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ExchangeRateService.objects.using(db_alias).filter(
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service_type=OLD_SERVICE_TYPE_TO_UPDATE
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).update(service_type=NEW_SERVICE_TYPE, api_key=None)
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def backwards_func(apps, schema_editor):
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"""
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Backward migration: This operation is not safely reversible.
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- We cannot know which 'frankfurter' services were originally 'synth_finance'.
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- The deleted 'synth_finance_stock' services cannot be recovered.
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We will leave this function empty to allow migrating backwards without doing anything.
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"""
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pass
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class Migration(migrations.Migration):
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dependencies = [
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# Add the previous migration file here
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("currencies", "0019_alter_exchangerateservice_service_type"),
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]
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operations = [
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migrations.RunPython(forwards_func, reverse_code=backwards_func),
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]
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