{"id":1068,"date":"2011-02-01T18:09:24","date_gmt":"2011-02-01T09:09:24","guid":{"rendered":"http:\/\/peta.okechan.net\/blog\/?p=1068"},"modified":"2011-02-02T15:02:06","modified_gmt":"2011-02-02T06:02:06","slug":"django-%e3%83%a2%e3%83%87%e3%83%ab%e3%83%95%e3%82%a3%e3%83%bc%e3%83%ab%e3%83%89%e3%81%ab%e4%bb%bb%e6%84%8f%e3%81%aepython%e3%82%aa%e3%83%96%e3%82%b8%e3%82%a7%e3%82%af%e3%83%88%e3%82%92%e4%bf%9d","status":"publish","type":"post","link":"https:\/\/peta.okechan.net\/blog\/archives\/1068","title":{"rendered":"Django \u30e2\u30c7\u30eb\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u4efb\u610f\u306ePython\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4fdd\u5b58\u3059\u308b\uff08BASE64\u4f7f\u308f\u306a\u3044\u7248\uff09"},"content":{"rendered":"

\u8abf\u3079\u3066\u307f\u3066\u3082ASCII\u5f62\u5f0f\u3067pickle\u5316\u3059\u308b\u304b\u3001\u30d0\u30a4\u30ca\u30ea\u5f62\u5f0f\u3067pickle\u5316\u3057\u3064\u3064BASE64\u3092\u4f7f\u3046\u65b9\u6cd5\u3057\u304b\u898b\u3064\u3051\u308c\u306a\u304b\u3063\u305f\u3002
\n\uff08\u4e0d\u601d\u8b70\u306a\u306e\u304c\u3001\u4e00\u756a\u591a\u304f\u76ee\u306b\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u304c\u3001ASCII\u5f62\u5f0f\u3067pickle\u5316\u3057\u3064\u3064BASE64\u3092\u4f7f\u3063\u3066CharField\u306b\u4fdd\u5b58\u3059\u308b\u65b9\u6cd5\u306a\u3093\u3060\u3051\u3069\u3001CharField\u306b\u4fdd\u5b58\u3059\u308b\u306a\u3089\u3069\u3063\u3061\u304b\u7247\u65b9\u3067\u3088\u304f\u306a\u3044\uff1f\u305d\u308c\u3053\u305d\u7121\u99c4\u306b\u5bb9\u91cf\u98df\u3046\u3057\u3002\uff09
\n\u305d\u3053\u3067\u30d0\u30a4\u30ca\u30ea\u5f62\u5f0f\u3067pickle\u5316\u3057\u305f\u3082\u306e\u3092\u305d\u306e\u307e\u307e\u4fdd\u5b58\u3059\u308b\u65b9\u6cd5\u3092\u8003\u3048\u3066\u307f\u305f\u3002
\nASCII\u5f62\u5f0f\u3067pickle\u5316\u3057\u305f\u308a\u3001BASE64\u4f7f\u3063\u305f\u308a\u3059\u308b\u3068\u30c7\u30fc\u30bf\u91cf\u304c\u5897\u3048\u308b\u304b\u3089\u5acc\u3060\u3002<\/p>\n

\u30bb\u30aa\u30ea\u30fc\u3069\u304a\u308adjango.db.models.Field\u3092\u7d99\u627f\u3057\u3066\u65b0\u3057\u3044\u30e2\u30c7\u30eb\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5b9a\u7fa9\u3057\u305f\u3002
\n\u74b0\u5883\u306fDjango1.2\u3068Python2.7<\/p>\n

\r\nfrom django.db import models\r\nfrom django.conf import settings\r\nimport cPickle\r\n\r\n__pickle_protocol__ = 2\r\n\r\nclass ObjectField(models.Field):\r\n    u'''\r\n    Python\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3057\u3066DB\u306b\u683c\u7d0d\u3059\u308b\u305f\u3081\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\r\n    '''\r\n    \r\n    __metaclass__ = models.SubfieldBase\r\n    \r\n    def db_type(self):\r\n        if settings.DATABASES['default']['ENGINE'].endswith('mysql'):\r\n            return 'LONGBLOB'\r\n        else:\r\n            raise NotImplementedError\r\n    \r\n    def to_python(self, value):\r\n        u'''\r\n        loads\u3057\u3066\u307f\u3066\u6210\u529f\u3057\u305f\u3089\u7d50\u679c\u3092\u8fd4\u3059\u3002\r\n        \u5931\u6557\u3057\u305f\u3089\u305d\u306e\u307e\u307e\u8fd4\u3059\u3002\r\n        \u3064\u307e\u308aload\u53ef\u80fd\u306a\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fload\u3055\u308c\u3066\u3057\u307e\u3046\u305f\u3081\u305d\u306e\u307e\u307e\u4fdd\u5b58\u3067\u304d\u306a\u3044\u3002\r\n        '''\r\n        if isinstance(value, str):\r\n            try:\r\n                return cPickle.loads(value)\r\n            except (cPickle.UnpicklingError, EOFError), e:\r\n                return value\r\n        return value\r\n    \r\n    def get_db_prep_save(self, value):\r\n        if value is None:\r\n            return None\r\n        return cPickle.dumps(value, __pickle_protocol__)\r\n<\/pre>\n
\u3053\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u3092\u4f7f\u3063\u3066\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u30fb\u30fb\u30fb<\/p>\n
\r\nclass Hoge(models.Model):\r\n    name = models.CharField(u'\u540d\u524d', max_length = 99)\r\n    status = ObjectField(u'\u72b6\u614b')\r\n<\/pre>\n
\u30d3\u30e5\u30fc\u3068\u304b\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u66f8\u304d\u51fa\u6765\u308b\u3002\uff08\u81ea\u524d\u3067\u4f5c\u3063\u305f\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306a\u3069pickle\u3067\u6271\u3048\u308b\u3082\u306e\u306a\u3089\u307b\u307c\u306a\u3093\u3067\u3082\u4fdd\u5b58\u3067\u304d\u308b\u3002\uff09<\/p>\n
\r\nhoge = Hoge()\r\nhoge.name = 'test1'\r\nhoge.status = {'a': 1, 'b': 'aiueo', 'c': [1, 2, 3, 4, 5], 'd': {'a': 0.1, 'b': 'aeiou'}}\r\nhoge.save()\r\n<\/pre>\n
\r\nfor hoge in Hoge.objects.all():\r\n    print hoge.status['d']['b']\r\n<\/pre>\n
\u305f\u3060\u3057\u3001\u30bd\u30fc\u30b9\u306b\u3082\u66f8\u3044\u3066\u308b\u3051\u3069\u554f\u984c\u70b9\u304c\u3044\u304f\u3064\u304b\u3042\u3063\u3066\u3001
\n\u4eca\u56de\u4f5c\u3063\u305fObjectField\u30af\u30e9\u30b9\u306fDB\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u304cmysql\u306e\u5834\u5408\u3057\u304b\u8003\u616e\u3057\u3066\u306a\u3044\u3051\u3069\u3001default\u306eDB\u3057\u304b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u306a\u3044\u70b9\u304c\u4e00\u3064\u3002\uff08Django1.2\u304b\u3089\u8907\u6570\u7a2e\u985e\u306eDB\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u70b9\u306b\u5bfe\u3057\u3066\u3068\u308a\u3042\u3048\u305a\u306e\u5bfe\u5fdc\u3057\u304b\u3057\u3066\u3044\u306a\u3044\u3002\uff09
\n\u3082\u3046\u4e00\u3064\u306f\u3001pickle.load\u53ef\u80fd\u306a\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4fdd\u5b58\u3057\u3088\u3046\u3068\u3057\u305f\u5834\u5408\u3001\u4e00\u5ea6unpickle\u5316\u3055\u308c\u3066\u304b\u3089\u4fdd\u5b58\u3055\u308c\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u6b21\u306b\u8aad\u307f\u3060\u3057\u305f\u3068\u304d\u306b\u5143\u306e\u6587\u5b57\u5217\u3067\u306f\u306a\u304funpickle\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u8fd4\u3063\u3066\u304d\u3066\u3057\u307e\u3046\u70b9\u3002<\/p>\n
ASCII\u5f62\u5f0f\u306epickle\u5316\u3084BASE64\u3067\u5bb9\u91cf\u3092\u5e38\u306b\u7121\u99c4\u306b\u3057\u3066\u3057\u307e\u3046\u306e\u3068\u9055\u3063\u3066\u3001\u81ea\u5206\u306e\u7528\u9014\u3067\u306f\u4e0a\u8a18\u306e\u554f\u984c\u70b9\u306f\u95a2\u4fc2\u306a\u3044\u306e\u3067\u3068\u308a\u3042\u3048\u305a\u30b3\u30ec\u3067\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u8abf\u3079\u3066\u307f\u3066\u3082ASCII\u5f62\u5f0f\u3067pickle\u5316\u3059\u308b\u304b\u3001\u30d0\u30a4\u30ca\u30ea\u5f62\u5f0f\u3067pickle\u5316\u3057\u3064\u3064BASE64\u3092\u4f7f\u3046\u65b9\u6cd5\u3057\u304b\u898b\u3064\u3051\u308c\u306a\u304b\u3063\u305f\u3002
\n\uff08\u4e0d\u601d\u8b70\u306a\u306e\u304c\u3001\u4e00\u756a\u591a\u304f\u76ee\u306b\u3059\u308b\u30d1\u30bf\u30fc\u30f3\u304c\u3001ASCII\u5f62\u5f0f\u3067pickle\u5316\u3057\u3064\u3064BASE64\u3092\u4f7f\u3063\u3066CharField\u306b\u4fdd\u5b58\u3059\u308b\u65b9\u6cd5\u306a\u3093\u3060\u3051\u3069\u3001CharField\u306b\u4fdd\u5b58\u3059\u308b\u306a\u3089\u3069\u3063\u3061\u304b\u7247\u65b9\u3067\u3088\u304f\u306a\u3044\uff1f\u305d\u308c\u3053\u305d\u7121\u99c4\u306b\u5bb9\u91cf\u98df\u3046\u3057\u3002\uff09
\n\u305d\u3053\u3067\u30d0\u30a4\u30ca\u30ea\u5f62\u5f0f\u3067pickle\u5316\u3057\u305f\u3082\u306e\u3092\u305d\u306e\u307e\u307e\u4fdd\u5b58\u3059\u308b\u65b9\u6cd5\u3092\u8003\u3048\u3066\u307f\u305f\u3002
\nASCII\u5f62\u5f0f\u3067pickle\u5316\u3057\u305f\u308a\u3001BASE64\u4f7f\u3063\u305f\u308a\u3059\u308b\u3068\u30c7\u30fc\u30bf\u91cf\u304c\u5897\u3048\u308b\u304b\u3089\u5acc\u3060\u3002<\/p>\n
\u30bb\u30aa\u30ea\u30fc\u3069\u304a\u308adjango.db.models.Field\u3092\u7d99\u627f\u3057\u3066\u65b0\u3057\u3044\u30e2\u30c7\u30eb\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5b9a\u7fa9\u3057\u305f\u3002
\n\u74b0\u5883\u306fDjango1.2\u3068Python2.7<\/p>\n
\r\nfrom django.db import models\r\nfrom django.conf import settings\r\nimport cPickle\r\n\r\n__pickle_protocol__ = 2\r\n\r\nclass ObjectField(models.Field):\r\n    u'''\r\n    Python\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3057\u3066DB\u306b\u683c\u7d0d\u3059\u308b\u305f\u3081\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\r\n    '''\r\n    \r\n    __metaclass__ = models.SubfieldBase\r\n    \r\n    def db_type(self):\r\n        if settings.DATABASES['default']['ENGINE'].endswith('mysql'):\r\n            return 'LONGBLOB'\r\n        else:\r\n            raise NotImplementedError\r\n    \r\n    def to_python(self, value):\r\n        u'''\r\n        loads\u3057\u3066\u307f\u3066\u6210\u529f\u3057\u305f\u3089\u7d50\u679c\u3092\u8fd4\u3059\u3002\r\n        \u5931\u6557\u3057\u305f\u3089\u305d\u306e\u307e\u307e\u8fd4\u3059\u3002\r\n        \u3064\u307e\u308aload\u53ef\u80fd\u306a\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306fload\u3055\u308c\u3066\u3057\u307e\u3046\u305f\u3081\u305d\u306e\u307e\u307e\u4fdd\u5b58\u3067\u304d\u306a\u3044\u3002\r\n        '''\r\n        if isinstance(value, str):\r\n            try:\r\n                return cPickle.loads(value)\r\n            except (cPickle.UnpicklingError, EOFError), e:\r\n                return value\r\n        return value\r\n    \r\n    def get_db_prep_save(self, value):\r\n        if value is None:\r\n            return None\r\n        return cPickle.dumps(value, __pickle_protocol__)\r\n<\/pre>\n
\u3053\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u30af\u30e9\u30b9\u3092\u4f7f\u3063\u3066\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30e2\u30c7\u30eb\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u30fb\u30fb\u30fb<\/p>\n
\r\nclass Hoge(models.Model):\r\n    name = models.CharField(u'\u540d\u524d', max_length = 99)\r\n    status = ObjectField(u'\u72b6\u614b')\r\n<\/pre>\n
\u30d3\u30e5\u30fc\u3068\u304b\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u66f8\u304d\u51fa\u6765\u308b\u3002\uff08\u81ea\u524d\u3067\u4f5c\u3063\u305f\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306a\u3069pickle\u3067\u6271\u3048\u308b\u3082\u306e\u306a\u3089\u307b\u307c\u306a\u3093\u3067\u3082\u4fdd\u5b58\u3067\u304d\u308b\u3002\uff09<\/p>\n
\r\nhoge = Hoge()\r\nhoge.name = 'test1'\r\nhoge.status = {'a': 1, 'b': 'aiueo', 'c': [1, 2, 3, 4, 5], 'd': {'a': 0.1, 'b': 'aeiou'}}\r\nhoge.save()\r\n<\/pre>\n
\r\nfor hoge in Hoge.objects.all():\r\n    print hoge.status['d']['b']\r\n<\/pre>\n
\u305f\u3060\u3057\u3001\u30bd\u30fc\u30b9\u306b\u3082\u66f8\u3044\u3066\u308b\u3051\u3069\u554f\u984c\u70b9\u304c\u3044\u304f\u3064\u304b\u3042\u3063\u3066\u3001
\n\u4eca\u56de\u4f5c\u3063\u305fObjectField\u30af\u30e9\u30b9\u306fDB\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u304cmysql\u306e\u5834\u5408\u3057\u304b\u8003\u616e\u3057\u3066\u306a\u3044\u3051\u3069\u3001default\u306eDB\u3057\u304b\u30c1\u30a7\u30c3\u30af\u3057\u3066\u306a\u3044\u70b9\u304c\u4e00\u3064\u3002\uff08Django1.2\u304b\u3089\u8907\u6570\u7a2e\u985e\u306eDB\u3092\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u70b9\u306b\u5bfe\u3057\u3066\u3068\u308a\u3042\u3048\u305a\u306e\u5bfe\u5fdc\u3057\u304b\u3057\u3066\u3044\u306a\u3044\u3002\uff09
\n\u3082\u3046\u4e00\u3064\u306f\u3001pickle.load\u53ef\u80fd\u306a\u6587\u5b57\u5217\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4fdd\u5b58\u3057\u3088\u3046\u3068\u3057\u305f\u5834\u5408\u3001\u4e00\u5ea6unpickle\u5316\u3055\u308c\u3066\u304b\u3089\u4fdd\u5b58\u3055\u308c\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u6b21\u306b\u8aad\u307f\u3060\u3057\u305f\u3068\u304d\u306b\u5143\u306e\u6587\u5b57\u5217\u3067\u306f\u306a\u304funpickle\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u8fd4\u3063\u3066\u304d\u3066\u3057\u307e\u3046\u70b9\u3002<\/p>\n
ASCII\u5f62\u5f0f\u306epickle\u5316\u3084BASE64\u3067\u5bb9\u91cf\u3092\u5e38\u306b\u7121\u99c4\u306b\u3057\u3066\u3057\u307e\u3046\u306e\u3068\u9055\u3063\u3066\u3001\u81ea\u5206\u306e\u7528\u9014\u3067\u306f\u4e0a\u8a18\u306e\u554f\u984c\u70b9\u306f\u95a2\u4fc2\u306a\u3044\u306e\u3067\u3068\u308a\u3042\u3048\u305a\u30b3\u30ec\u3067\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[369,60],"class_list":["post-1068","post","type-post","status-publish","format-standard","hentry","category-tech","tag-django","tag-python"],"_links":{"self":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts\/1068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/comments?post=1068"}],"version-history":[{"count":0,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/posts\/1068\/revisions"}],"wp:attachment":[{"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/media?parent=1068"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/categories?post=1068"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/peta.okechan.net\/blog\/wp-json\/wp\/v2\/tags?post=1068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}