61 lines
2.4 KiB
Python
61 lines
2.4 KiB
Python
from django.db import migrations, models
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def canonical_mobile(value):
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if value is None:
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return None
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text = str(value)
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if len(text) == 12 and text.startswith('98'):
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return int(text[2:])
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return value
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def normalized_rows(model, alias, per_workspace=False):
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seen = {}
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updates = []
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fields = ('pk', 'mobile', 'sys_ws_id') if per_workspace else ('pk', 'mobile')
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for row in model.objects.using(alias).only(*fields).iterator():
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mobile = canonical_mobile(row.mobile)
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key = (row.sys_ws_id, mobile) if per_workspace else mobile
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if mobile is not None and key in seen:
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raise RuntimeError(
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f'Duplicate mobiles in {model._meta.label}: record IDs {seen[key]} and {row.pk}. '
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'Resolve these records before migration. No records were deleted.'
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)
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if mobile is not None:
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seen[key] = row.pk
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if mobile != row.mobile:
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row.mobile = mobile
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updates.append(row)
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return updates
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def check_and_normalize_mobiles(apps, schema_editor):
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alias = schema_editor.connection.alias
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customer = apps.get_model('customer', 'Customer')
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user = apps.get_model('cuser', 'CUser')
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role = apps.get_model('cuser', 'CuserRole')
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# Audit both tables before writing. A collision never silently merges people.
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customer_updates = normalized_rows(customer, alias, per_workspace=True)
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user_updates = normalized_rows(user, alias)
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role_updates = []
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for row in role.objects.using(alias).only('pk', 'mobile').iterator():
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normalized = canonical_mobile(row.mobile)
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if normalized != row.mobile:
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row.mobile = normalized
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role_updates.append(row)
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customer.objects.using(alias).bulk_update(customer_updates, ['mobile'], batch_size=500)
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user.objects.using(alias).bulk_update(user_updates, ['mobile'], batch_size=500)
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role.objects.using(alias).bulk_update(role_updates, ['mobile'], batch_size=500)
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class Migration(migrations.Migration):
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dependencies = [('customer', '0007_alter_customer_name_family'), ('cuser', '0013_alter_cuser_name_family')]
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operations = [
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migrations.RunPython(check_and_normalize_mobiles, migrations.RunPython.noop),
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migrations.AddConstraint(
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model_name='customer',
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constraint=models.UniqueConstraint(fields=('sys_ws', 'mobile'), name='customer_workspace_mobile_unique'),
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),
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]
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