39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
import tempfile
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from pathlib import Path
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from django.core.files import File
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from django.db import models
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from PIL import Image
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class Attachment(models.Model):
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description = models.CharField(max_length=500)
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original_file = models.FileField()
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processed_file = models.FileField(blank=True, null=True)
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def save(self, *args, **kwargs):
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if self.processed_file:
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return super().save(*args, **kwargs)
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try:
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image = Image.open(self.original_file.path)
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except IOError:
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return self.save(*args, **kwargs)
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max_width = 640
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if image.width > max_width:
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ratio = image.height / image.width
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height = round(max_width * ratio)
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output = image.resize((max_width, height))
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else:
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output = image.copy()
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current_path = Path(image.filename)
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temp_dir = Path(tempfile.mkdtemp())
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temp_path = temp_dir / (current_path.stem + "-resized" + current_path.suffix)
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output.save(temp_path)
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with open(temp_path, "rb") as output_file:
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f = File(output_file)
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self.processed_file.save(temp_path.name, f, save=False)
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temp_path.unlink()
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temp_dir.rmdir()
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return super().save(*args, **kwargs)
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