26 lines
755 B
Python
26 lines
755 B
Python
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from django.db import migrations, models
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def populate_code(apps, schema_editor):
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"""为已有机构填充 code = 'INST-{pk}'。"""
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Institution = apps.get_model('user', 'Institution')
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for inst in Institution.objects.filter(code__isnull=True):
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inst.code = f'INST-{inst.pk}'
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inst.save(update_fields=['code'])
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class Migration(migrations.Migration):
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dependencies = [
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('user', '0003_institution_add_code_field'),
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]
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operations = [
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migrations.RunPython(populate_code, migrations.RunPython.noop),
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migrations.AlterField(
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model_name='institution',
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name='code',
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field=models.CharField(max_length=100, unique=True, verbose_name='机构编码'),
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),
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]
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