Give ISBN to each borrowable object, even if it does not have one
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@ -21,6 +21,7 @@ class Migration(migrations.Migration):
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name='Borrowable',
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fields=[
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('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
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('isbn', media.fields.ISBNField(blank=True, help_text='You may be able to scan it from a bar code.', max_length=28, null=True, unique=True, validators=[media.validators.isbn_validator], verbose_name='ISBN')),
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('title', models.CharField(max_length=255, verbose_name='title')),
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('present', models.BooleanField(default=False, help_text='Tell that the medium is present in the Mediatek.', verbose_name='present')),
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('polymorphic_ctype', models.ForeignKey(editable=False, null=True, on_delete=django.db.models.deletion.CASCADE, related_name='polymorphic_media.borrowable_set+', to='contenttypes.ContentType')),
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@ -74,7 +75,6 @@ class Migration(migrations.Migration):
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name='Book',
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fields=[
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('medium_ptr', models.OneToOneField(auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to='media.Medium')),
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('isbn', media.fields.ISBNField(blank=True, help_text='You may be able to scan it from a bar code.', max_length=28, null=True, unique=True, validators=[media.validators.isbn_validator], verbose_name='ISBN')),
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('subtitle', models.CharField(blank=True, max_length=255, verbose_name='subtitle')),
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('number_of_pages', models.PositiveIntegerField(blank=True, null=True, verbose_name='number of pages')),
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('publish_date', models.DateField(blank=True, null=True, verbose_name='publish date')),
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@ -32,6 +32,14 @@ class Author(models.Model):
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class Borrowable(PolymorphicModel):
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isbn = ISBNField(
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_('ISBN'),
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help_text=_('You may be able to scan it from a bar code.'),
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unique=True,
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blank=True,
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null=True,
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)
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title = models.CharField(
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max_length=255,
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verbose_name=_("title"),
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@ -83,14 +91,6 @@ class Medium(Borrowable):
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class Book(Medium):
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isbn = ISBNField(
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_('ISBN'),
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help_text=_('You may be able to scan it from a bar code.'),
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unique=True,
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blank=True,
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null=True,
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)
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subtitle = models.CharField(
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verbose_name=_('subtitle'),
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max_length=255,
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