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from django.db import models
from django.db.models.signals import post_delete
from signals import delete_files
import settings
import datetime
import Image, os
def handle_thumb(image_obj, thumb_obj, width, height):
# create thumbnail
if image_obj and not thumb_obj:
thumb = image_obj.path + ('-small.jpg')
#try:
t = Image.open(image_obj.path)
w, h = t.size
if float(w)/h < float(width)/height:
t = t.resize((width, h*width/w), Image.ANTIALIAS)
else:
t = t.resize((w*height/h, height), Image.ANTIALIAS)
w, h = t.size
t = t.crop( ((w-width)/2, (h-height)/4, (w-width)/2+width, \
(h-height)/4+height) )
t.save(settings.MEDIA_ROOT + thumb, 'JPEG')
os.chmod(settings.MEDIA_ROOT + thumb, 0666)
thumb_obj = image_obj.url + ('-small.jpg')
#except:
# pass
return thumb_obj
class Video(models.Model):
"""Videos to be uploaded.."""
name = models.CharField(max_length=128)
filename = models.FileField(upload_to="uploads/videos")
image = models.ImageField(upload_to="uploads/screenshots")
thumbnail = models.ImageField(upload_to='uploads/screenshots', \
blank=True, null=True, editable=False)
description = models.TextField()
created = models.DateTimeField(auto_now_add=True)
def __unicode__(self):
return self.name
def save(self, *args, **kwargs):
'''On save, generate thumbnails'''
super(Video, self).save()
self.thumbnail = handle_thumb(self.image, self.thumbnail, 100, 100)
super(Video, self).save(force_update=True)
#Call the delete_files signal to delete physical files on delete of record
post_delete.connect(delete_files, Video)
class Module(models.Model):
name = models.CharField(max_length=128)
description = models.TextField()
video_list = models.ManyToManyField(Video)
created = models.DateTimeField(auto_now_add=True)
modified = models.DateTimeField()
def save(self, *args, **kwargs):
''' On save, update timestamps '''
self.modified = datetime.datetime.today()
super(Module, self).save(*args, **kwargs)
def __unicode__(self):
return self.name
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