Merge item snapshot and item to be one model.
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django_etesync/migrations/0002_auto_20200220_0943.py
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53
django_etesync/migrations/0002_auto_20200220_0943.py
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# Generated by Django 3.0.3 on 2020-02-20 09:43
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import django.core.validators
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from django.db import migrations, models
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import django.db.models.deletion
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class Migration(migrations.Migration):
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dependencies = [
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('django_etesync', '0001_initial'),
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]
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operations = [
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migrations.RemoveField(
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model_name='collectionitemchunk',
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name='itemSnapshot',
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),
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migrations.AddField(
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model_name='collectionitem',
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name='hmac',
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field=models.CharField(default='', max_length=50),
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preserve_default=False,
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),
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migrations.AddField(
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model_name='collectionitemchunk',
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name='items',
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field=models.ManyToManyField(related_name='chunks', to='django_etesync.CollectionItem'),
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),
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migrations.AlterField(
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model_name='collection',
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name='uid',
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field=models.CharField(db_index=True, max_length=44, validators=[django.core.validators.RegexValidator(message='Not a valid UID. Expected a 256bit base64url.', regex='[a-zA-Z0-9\\-_=]{44}')]),
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),
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migrations.AlterField(
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model_name='collectionitem',
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name='collection',
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field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='items', to='django_etesync.Collection'),
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),
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migrations.AlterField(
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model_name='collectionitem',
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name='uid',
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field=models.CharField(db_index=True, max_length=44, validators=[django.core.validators.RegexValidator(message='Not a valid UID. Expected a 256bit base64url.', regex='[a-zA-Z0-9\\-_=]{44}')]),
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),
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migrations.AlterField(
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model_name='collectionitemchunk',
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name='uid',
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field=models.CharField(db_index=True, max_length=44, validators=[django.core.validators.RegexValidator(message='Not a valid UID. Expected a 256bit base64url.', regex='[a-zA-Z0-9\\-_=]{44}')]),
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),
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migrations.DeleteModel(
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name='CollectionItemSnapshot',
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),
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]
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18
django_etesync/migrations/0003_collectionitem_current.py
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18
django_etesync/migrations/0003_collectionitem_current.py
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# Generated by Django 3.0.3 on 2020-02-20 09:47
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from django.db import migrations, models
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class Migration(migrations.Migration):
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dependencies = [
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('django_etesync', '0002_auto_20200220_0943'),
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]
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operations = [
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migrations.AddField(
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model_name='collectionitem',
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name='current',
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field=models.BooleanField(default=True),
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),
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]
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18
django_etesync/migrations/0004_auto_20200220_1029.py
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django_etesync/migrations/0004_auto_20200220_1029.py
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# Generated by Django 3.0.3 on 2020-02-20 10:29
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from django.db import migrations, models
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class Migration(migrations.Migration):
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dependencies = [
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('django_etesync', '0003_collectionitem_current'),
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]
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operations = [
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migrations.AlterField(
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model_name='collectionitem',
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name='current',
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field=models.BooleanField(db_index=True, default=True),
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),
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]
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@ -12,6 +12,8 @@
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from pathlib import Path
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from django.db import models
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from django.conf import settings
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from django.core.validators import RegexValidator
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@ -33,45 +35,41 @@ class Collection(models.Model):
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def __str__(self):
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return self.uid
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@cached_property
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def current_items(self):
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return self.items.filter(current=True)
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class CollectionItem(models.Model):
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uid = models.CharField(db_index=True, blank=False, null=False,
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max_length=44, validators=[UidValidator])
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version = models.PositiveSmallIntegerField()
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encryptionKey = models.BinaryField(editable=True, blank=False, null=False)
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collection = models.ForeignKey(Collection, on_delete=models.CASCADE)
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collection = models.ForeignKey(Collection, related_name='items', on_delete=models.CASCADE)
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hmac = models.CharField(max_length=50, blank=False, null=False)
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current = models.BooleanField(db_index=True, default=True)
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class Meta:
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unique_together = ('uid', 'collection')
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@cached_property
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def content(self):
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return self.snapshots.get(current=True)
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def __str__(self):
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return self.uid
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class CollectionItemSnapshot(models.Model):
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item = models.ForeignKey(CollectionItem, related_name='snapshots', on_delete=models.CASCADE)
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current = models.BooleanField(default=True)
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chunkHmac = models.CharField(max_length=50, blank=False, null=False)
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class Meta:
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unique_together = ('item', 'current')
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def __str__(self):
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return "{}, current={}".format(self.item.uid, self.current)
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def chunk_directory_path(instance, filename):
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col = instance.itemSnapshot.item.collection
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user_id = col.owner.id
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return Path('user_{}'.format(user_id), col.uid, instance.uid)
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class CollectionItemChunk(models.Model):
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uid = models.CharField(db_index=True, blank=False, null=False,
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max_length=44, validators=[UidValidator])
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itemSnapshot = models.ForeignKey(CollectionItemSnapshot, related_name='chunks', null=True, on_delete=models.SET_NULL)
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items = models.ManyToManyField(CollectionItem, related_name='chunks')
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order = models.CharField(max_length=100, blank=False, null=False)
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# We probably just want to implement this manually because we can have more than one pointing to a file. chunkFile = models.FileField(upload_to=chunk_directory_path)
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class Meta:
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# unique_together = ('itemSnapshot', 'order') # Currently off because we set the item snapshot to null on deletion
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ordering = ['order']
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def __str__(self):
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@ -64,25 +64,27 @@ class CollectionItemChunkSerializer(serializers.ModelSerializer):
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fields = ('uid', )
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class CollectionItemSnapshotSerializer(serializers.ModelSerializer):
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class CollectionItemSerializer(serializers.ModelSerializer):
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encryptionKey = BinaryBase64Field()
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chunks = serializers.SlugRelatedField(
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slug_field='uid',
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queryset=models.CollectionItemChunk,
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queryset=models.CollectionItemChunk.objects.all(),
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many=True
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)
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class Meta:
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model = models.CollectionItemSnapshot
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fields = ('chunks', 'chunkHmac')
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class CollectionItemSerializer(serializers.ModelSerializer):
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encryptionKey = BinaryBase64Field()
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content = CollectionItemSnapshotSerializer(
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read_only=True,
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many=False
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)
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class Meta:
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model = models.CollectionItem
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fields = ('uid', 'version', 'encryptionKey', 'content')
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fields = ('uid', 'version', 'encryptionKey', 'chunks', 'hmac')
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class CollectionItemInlineSerializer(CollectionItemSerializer):
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chunksData = serializers.SerializerMethodField('get_inline_chunks_from_context')
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class Meta(CollectionItemSerializer.Meta):
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fields = CollectionItemSerializer.Meta.fields + ('chunksData', )
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def get_inline_chunks_from_context(self, obj):
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request = self.context.get('request', None)
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if request is not None:
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return ['SomeInlineData', 'Somemoredata']
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return 'readOnly'
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@ -27,11 +27,11 @@ from rest_framework import viewsets
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from rest_framework.response import Response
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from . import app_settings, paginators
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from .models import Collection, CollectionItem, CollectionItemSnapshot, CollectionItemChunk
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from .models import Collection, CollectionItem, CollectionItemChunk
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from .serializers import (
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CollectionSerializer,
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CollectionItemSerializer,
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CollectionItemSnapshotSerializer,
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CollectionItemInlineSerializer,
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CollectionItemChunkSerializer
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)
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