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53 lines
2.7 KiB
Python
53 lines
2.7 KiB
Python
from django.db import models
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class Chunk(models.Model):
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checksum = models.CharField(max_length=40, unique=True) # unique implies index, which we also use for lookups
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size = models.PositiveIntegerField()
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data = models.BinaryField(null=False) # as with Events, we can "eventually" move this out of the database
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created_at = models.DateTimeField(auto_now_add=True, editable=False, db_index=True)
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def __str__(self):
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return self.checksum
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class File(models.Model):
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# NOTE: since we do single-chunk uploads, optimizations are imaginable. Make it work first though
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checksum = models.CharField(max_length=40, unique=True) # unique implies index, which we also use for lookups
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# the filename is not unique, nor meaningful in the sense that you could use it to identify the file. It is only
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# here for convenience, i.e. to eye-ball the file in a list. note that we store by checksum, and the filename gets
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# associated on the first successful store. i.e. it's possible that a file would be stored again with a different
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# name but that would go undetected by us. all that is to say: convenience thingie without strong guarantees.
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filename = models.CharField(max_length=255)
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size = models.PositiveIntegerField()
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data = models.BinaryField(null=False) # as with Events, we can "eventually" move this out of the database
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created_at = models.DateTimeField(auto_now_add=True, editable=False, db_index=True)
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accessed_at = models.DateTimeField(auto_now_add=True, editable=False, db_index=True)
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def __str__(self):
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return self.filename
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class FileMetadata(models.Model):
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file = models.ForeignKey(File, null=False, on_delete=models.CASCADE, related_name="metadatas")
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# debug_id & file_type nullability: such data exists in manifest.json; we are future-proof for it although we
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# currently don't store it as such.
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debug_id = models.UUIDField(max_length=40, null=True, blank=True)
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file_type = models.CharField(max_length=255, null=True, blank=True)
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data = models.TextField() # we just dump the rest in here; let's see how much we really need.
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created_at = models.DateTimeField(auto_now_add=True, editable=False, db_index=True)
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def __str__(self):
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# somewhat useless when debug_id is None; but that's not the case we care about ATM
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return f"debug_id: {self.debug_id} ({self.file_type})"
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class Meta:
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# it's _imaginable_ that the below does not actually hold (we just trust the CLI, after all), but that wouldn't
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# make any sense, so we just enforce a property that makes sense. Pro: lookups work. Con: if the client sends
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# garbage, this is not exposed.
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unique_together = (("debug_id", "file_type"),)
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