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c89b18aa95
Differentiating between when the generated file content is required and when the generated file is just required to exist gives us more flexibility with strategies.
65 lines
1.9 KiB
Python
65 lines
1.9 KiB
Python
from django.db import models
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from imagekit.models import ProcessedImageField
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from imagekit.models import ImageSpecField
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from imagekit.processors import Adjust, ResizeToFill, SmartCrop
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class ImageModel(models.Model):
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image = models.ImageField(upload_to='b')
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class Photo(models.Model):
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original_image = models.ImageField(upload_to='photos')
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# Implicit source field
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thumbnail = ImageSpecField([Adjust(contrast=1.2, sharpness=1.1),
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ResizeToFill(50, 50)], format='JPEG',
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options={'quality': 90})
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smartcropped_thumbnail = ImageSpecField([Adjust(contrast=1.2,
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sharpness=1.1), SmartCrop(50, 50)], source='original_image',
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format='JPEG', options={'quality': 90})
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class ProcessedImageFieldModel(models.Model):
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processed = ProcessedImageField([SmartCrop(50, 50)], format='JPEG',
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options={'quality': 90}, upload_to='p')
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class CountingCacheFileStrategy(object):
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def __init__(self):
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self.on_existence_required_count = 0
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self.on_content_required_count = 0
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self.on_source_changed_count = 0
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self.on_source_created_count = 0
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def on_existence_required(self, file):
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self.on_existence_required_count += 1
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def on_content_required(self, file):
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self.on_content_required_count += 1
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def on_source_changed(self, file):
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self.on_source_changed_count += 1
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def on_source_created(self, file):
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self.on_source_created_count += 1
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class AbstractImageModel(models.Model):
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original_image = models.ImageField(upload_to='photos')
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abstract_class_spec = ImageSpecField(source='original_image',
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format='JPEG',
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cachefile_strategy=CountingCacheFileStrategy())
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class Meta:
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abstract = True
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class ConcreteImageModel(AbstractImageModel):
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pass
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class ConcreteImageModelSubclass(ConcreteImageModel):
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pass
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