mirror of
https://github.com/Hopiu/django-imagekit.git
synced 2026-03-17 05:40:25 +00:00
b1c5432310
Removed the save and clear_cache methods from ImageModel (along with helpers). Now, whenever an ImageSpec is contributed to a model, handlers are created for the post_save and post_delete signals. The post_save handler does the work of running the ImageSpec processors and caching the resulting file, while the post_delete handler does the work cleaning up the cached files.
77 lines
2.2 KiB
Python
77 lines
2.2 KiB
Python
import os
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from datetime import datetime
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from django.conf import settings
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from django.core.files.base import ContentFile
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from django.db import models
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from django.db.models.base import ModelBase
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from django.db.models.signals import post_delete
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from django.utils.html import conditional_escape as escape
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from django.utils.translation import ugettext_lazy as _
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from imagekit.specs import ImageSpec
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from imagekit.lib import *
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from imagekit.options import Options
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from imagekit.utils import img_to_fobj
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# Modify image file buffer size.
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ImageFile.MAXBLOCK = getattr(settings, 'PIL_IMAGEFILE_MAXBLOCK', 256 * 2 ** 10)
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# Choice tuples for specifying the crop origin.
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# These are provided for convenience.
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CROP_HORZ_CHOICES = (
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(0, _('left')),
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(1, _('center')),
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(2, _('right')),
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)
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CROP_VERT_CHOICES = (
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(0, _('top')),
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(1, _('center')),
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(2, _('bottom')),
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)
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class ImageModelBase(ModelBase):
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""" ImageModel metaclass
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This metaclass parses IKOptions and loads the specified specification
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module.
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"""
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def __init__(self, name, bases, attrs):
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user_opts = getattr(self, 'IKOptions', None)
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specs = []
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default_image_field = getattr(user_opts, 'default_image_field', None)
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for k, v in attrs.items():
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if isinstance(v, ImageSpec):
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specs.append(v)
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elif not default_image_field and isinstance(v, models.ImageField):
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default_image_field = k
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user_opts.specs = specs
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user_opts.default_image_field = default_image_field
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opts = Options(user_opts)
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setattr(self, '_ik', opts)
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ModelBase.__init__(self, name, bases, attrs)
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class ImageModel(models.Model):
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""" Abstract base class implementing all core ImageKit functionality
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Subclasses of ImageModel are augmented with accessors for each defined
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image specification and can override the inner IKOptions class to customize
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storage locations and other options.
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"""
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__metaclass__ = ImageModelBase
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class Meta:
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abstract = True
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class IKOptions:
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pass
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@property
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def _imgfields(self):
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return set([spec._get_imgfield(self) for spec in self._ik.specs])
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