58 lines
2.4 KiB
Python
58 lines
2.4 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import unicode_literals
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from django.db import migrations, models
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import django.db.models.deletion
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import coursewarehistoryextended.fields
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from django.conf import settings
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def bump_pk_start(apps, schema_editor):
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if not schema_editor.connection.alias == 'student_module_history':
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return
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StudentModuleHistory = apps.get_model("courseware", "StudentModuleHistory")
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biggest_id = StudentModuleHistory.objects.all().order_by('-id').first()
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initial_id = settings.STUDENTMODULEHISTORYEXTENDED_OFFSET
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if biggest_id is not None:
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initial_id += biggest_id.id
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if schema_editor.connection.vendor == 'mysql':
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schema_editor.execute('ALTER TABLE coursewarehistoryextended_studentmodulehistoryextended AUTO_INCREMENT=%s', [initial_id])
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elif schema_editor.connection.vendor == 'sqlite3':
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# This is a hack to force sqlite to add new rows after the earlier rows we
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# want to migrate.
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StudentModuleHistory(
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id=initial_id,
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course_key=None,
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usage_key=None,
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username="",
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version="",
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created=datetime.datetime.now(),
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).save()
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elif schema_editor.connection.vendor == 'postgresql':
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schema_editor.execute("SELECT setval('coursewarehistoryextended_studentmodulehistoryextended_seq', %s)", [initial_id])
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class Migration(migrations.Migration):
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dependencies = [
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('courseware', '0001_initial'),
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]
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operations = [
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migrations.CreateModel(
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name='StudentModuleHistoryExtended',
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fields=[
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('version', models.CharField(db_index=True, max_length=255, null=True, blank=True)),
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('created', models.DateTimeField(db_index=True)),
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('state', models.TextField(null=True, blank=True)),
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('grade', models.FloatField(null=True, blank=True)),
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('max_grade', models.FloatField(null=True, blank=True)),
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('id', coursewarehistoryextended.fields.UnsignedBigIntAutoField(serialize=False, primary_key=True)),
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('student_module', models.ForeignKey(to='courseware.StudentModule', on_delete=django.db.models.deletion.DO_NOTHING, db_constraint=False)),
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],
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options={
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'get_latest_by': 'created',
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},
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),
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migrations.RunPython(bump_pk_start, reverse_code=migrations.RunPython.noop, atomic=False),
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]
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