|
1
|
|
|
# -*- coding: utf-8 -*- |
|
2
|
|
|
from __future__ import absolute_import, unicode_literals |
|
3
|
|
|
|
|
4
|
|
|
import os |
|
5
|
|
|
import uuid |
|
6
|
|
|
|
|
7
|
|
|
from django.core.files.storage import default_storage |
|
8
|
|
|
from django.utils.text import slugify |
|
9
|
|
|
|
|
10
|
|
|
from .models import StdImageField, StdImageFieldFile |
|
11
|
|
|
|
|
12
|
|
|
|
|
13
|
|
|
class UploadTo(object): |
|
14
|
|
|
file_pattern = "%(name)s%(ext)s" |
|
15
|
|
|
path_pattern = "%(path)s" |
|
16
|
|
|
|
|
17
|
|
|
def __call__(self, instance, filename): |
|
18
|
|
|
path, ext = os.path.splitext(filename) |
|
19
|
|
|
path, name = os.path.split(path) |
|
20
|
|
|
defaults = { |
|
21
|
|
|
'ext': ext, |
|
22
|
|
|
'name': name, |
|
23
|
|
|
'path': path, |
|
24
|
|
|
'class_name': instance.__class__.__name__, |
|
25
|
|
|
} |
|
26
|
|
|
defaults.update(self.kwargs) |
|
27
|
|
|
return os.path.join(self.path_pattern % defaults, |
|
28
|
|
|
self.file_pattern % defaults).lower() |
|
29
|
|
|
|
|
30
|
|
|
def __init__(self, *args, **kwargs): |
|
31
|
|
|
self.kwargs = kwargs |
|
32
|
|
|
self.args = args |
|
33
|
|
|
|
|
34
|
|
|
def deconstruct(self): |
|
35
|
|
|
path = "%s.%s" % (self.__class__.__module__, self.__class__.__name__) |
|
36
|
|
|
return path, self.args, self.kwargs |
|
37
|
|
|
|
|
38
|
|
|
|
|
39
|
|
|
class UploadToUUID(UploadTo): |
|
40
|
|
|
|
|
41
|
|
|
def __call__(self, instance, filename): |
|
42
|
|
|
self.kwargs.update({ |
|
43
|
|
|
'name': uuid.uuid4().hex, |
|
44
|
|
|
}) |
|
45
|
|
|
return super(UploadToUUID, self).__call__(instance, filename) |
|
46
|
|
|
|
|
47
|
|
|
|
|
48
|
|
|
class UploadToClassNameDir(UploadTo): |
|
49
|
|
|
path_pattern = '%(class_name)s' |
|
50
|
|
|
|
|
51
|
|
|
|
|
52
|
|
|
class UploadToClassNameDirUUID(UploadToClassNameDir, UploadToUUID): |
|
53
|
|
|
pass |
|
54
|
|
|
|
|
55
|
|
|
|
|
56
|
|
|
class UploadToAutoSlug(UploadTo): |
|
57
|
|
|
|
|
58
|
|
|
def __init__(self, populate_from, **kwargs): |
|
59
|
|
|
self.populate_from = populate_from |
|
60
|
|
|
super(UploadToAutoSlug, self).__init__(populate_from, **kwargs) |
|
61
|
|
|
|
|
62
|
|
|
def __call__(self, instance, filename): |
|
63
|
|
|
field_value = getattr(instance, self.populate_from) |
|
64
|
|
|
self.kwargs.update({ |
|
65
|
|
|
'name': slugify(field_value), |
|
66
|
|
|
}) |
|
67
|
|
|
return super(UploadToAutoSlug, self).__call__(instance, filename) |
|
68
|
|
|
|
|
69
|
|
|
|
|
70
|
|
|
class UploadToAutoSlugClassNameDir(UploadToClassNameDir, UploadToAutoSlug): |
|
71
|
|
|
pass |
|
72
|
|
|
|
|
73
|
|
|
|
|
74
|
|
|
def pre_delete_delete_callback(sender, instance, **kwargs): |
|
75
|
|
|
for field in instance._meta.fields: |
|
76
|
|
|
if isinstance(field, StdImageField): |
|
77
|
|
|
getattr(instance, field.name).delete(False) |
|
78
|
|
|
|
|
79
|
|
|
|
|
80
|
|
|
def pre_save_delete_callback(sender, instance, **kwargs): |
|
81
|
|
|
if instance.pk: |
|
82
|
|
|
obj = sender.objects.get(pk=instance.pk) |
|
83
|
|
|
for field in instance._meta.fields: |
|
84
|
|
|
if isinstance(field, StdImageField): |
|
85
|
|
|
obj_field = getattr(obj, field.name) |
|
86
|
|
|
instance_field = getattr(instance, field.name) |
|
87
|
|
|
if obj_field and obj_field != instance_field: |
|
88
|
|
|
obj_field.delete(False) |
|
89
|
|
|
|
|
90
|
|
|
|
|
91
|
|
|
def render_variations(file_name, variations, replace=False, |
|
92
|
|
|
storage=default_storage): |
|
93
|
|
|
"""Render all variations for a given field.""" |
|
94
|
|
|
for key, variation in variations.items(): |
|
95
|
|
|
StdImageFieldFile.render_variation( |
|
96
|
|
|
file_name, variation, replace, storage |
|
97
|
|
|
) |
|
98
|
|
|
|
codingjoe /
django-stdimage
