问django 2 mysql数据库后端不接受0作为AutoField错误的值。

EN

class notecategory(models.Model):
    categoryname = models.CharField(max_length=150,null=False,default="")

    isPublic = models.BooleanField()
    owner = models.ForeignKey(User,on_delete=models.CASCADE,null=True,related_name='%(class)s_requests_created')


class note2(models.Model):
    category = models.ForeignKey(notecategory,on_delete=models.CASCADE,null=True)
    content = models.CharField(max_length =settings.CONSTANT_DICT['noteContentLen'] ,null=True)
    book = models.ForeignKey(book,on_delete=models.CASCADE,null=True)
    chapter = models.ForeignKey(chapter,on_delete=models.CASCADE,null=True)
    sentence = models.ForeignKey(sentence,on_delete=models.CASCADE,null=True)
    anchorAt = models.IntegerField(null=True)
    highlightLen = models.IntegerField(null=True)
    language = models.ForeignKey(language,on_delete=models.CASCADE, null=True)
    owner = models.ForeignKey(User, on_delete=models.CASCADE, null=True,related_name='%(class)s_requests_created')

toSave = note2(book_id=int(bookId),chapter=chapterInstance, sentence_id = int(sentenceId),
              category_id=int(categoryId), content=userInputNoteContent,anchorAt = int(anchorAt),highlightLen=int(highlightLen),
              language=languageInstance,
              owner=userInstance)
toSave.save()

class Migration(migrations.Migration):

    initial = True

    dependencies = [
        ('sentence', '0008_auto_20190118_1608'),
        ('language', '0001_initial'),
        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
    ]

    operations = [
        migrations.CreateModel(
            name='note2',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('content', models.CharField(max_length=150, null=True)),
                ('anchorAt', models.IntegerField(null=True)),
                ('highlightLen', models.IntegerField(null=True)),
                ('book', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='sentence.book')),
            ],
        ),
        migrations.CreateModel(
            name='notecategory',
            fields=[
                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
                ('categoryname', models.CharField(default='', max_length=150)),
                ('isPublic', models.BooleanField()),
                ('owner', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='notecategory_requests_created', to=settings.AUTH_USER_MODEL)),
            ],
        ),
        migrations.AddField(
            model_name='note2',
            name='category',
            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='note.notecategory'),
        ),
        migrations.AddField(
            model_name='note2',
            name='chapter',
            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='sentence.chapter'),
        ),
        migrations.AddField(
            model_name='note2',
            name='language',
            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='language.language'),
        ),
        migrations.AddField(
            model_name='note2',
            name='owner',
            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='note2_requests_created', to=settings.AUTH_USER_MODEL),
        ),
        migrations.AddField(
            model_name='note2',
            name='sentence',
            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, to='sentence.sentence'),
        ),
    ]