{"id":50042,"date":"2023-11-22T19:24:54","date_gmt":"2023-04-08T16:49:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/django%e6%95%99%e7%a8%8b%e5%a4%87%e5%bf%98%e5%bd%95%e7%ac%ac%e4%ba%8c%e9%83%a8%e5%88%86\/"},"modified":"2024-05-04T10:19:48","modified_gmt":"2024-05-04T02:19:48","slug":"django%e6%95%99%e7%a8%8b%e5%a4%87%e5%bf%98%e5%bd%95%e7%ac%ac%e4%ba%8c%e9%83%a8%e5%88%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/django%e6%95%99%e7%a8%8b%e5%a4%87%e5%bf%98%e5%bd%95%e7%ac%ac%e4%ba%8c%e9%83%a8%e5%88%86\/","title":{"rendered":"Django\u6559\u7a0b\u5907\u5fd8\u5f55\u7b2c\u4e8c\u90e8\u5206"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u8fd9\u7bc7\u6587\u7ae0\u662f\u5173\u4e8e\u7b2c\u4e00\u6b21\u521b\u5efa Django \u5e94\u7528\u7a0b\u5e8f\u7684\u5907\u5fd8\u5f55\uff0c\u8fd9\u662f\u7b2c\u4e8c\u90e8\u5206\u3002<br \/>\n\u7b2c\u4e00\u90e8\u5206\u5728\u8fd9\u91cc\u2192 Django \u6559\u7a0b\u5907\u5fd8\u5f55\u2460\u3002<\/p>\n<h1>\u6570\u636e\u5e93\u7684\u914d\u7f6e<\/h1>\n<p>\u53ef\u4ee5\u4ecemysite\/setting.py\u6587\u4ef6\u4e2d\u8fdb\u884c\u6570\u636e\u5e93\u7684\u8bbe\u7f6e\u64cd\u4f5c\u3002<\/p>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cSQLite\u88ab\u7528\u4e8e\u4f7f\u7528\uff0c\u4f46\u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u5efa\u8bae\u4f7f\u7528\u53ef\u6269\u5c55\u7684\u6570\u636e\u5e93\uff0c\u5982PostgreSQL\u3002<\/p>\n<p>\u672c\u6b21\u6559\u7a0b\u4e2d\u6211\u4eec\u4f1a\u4f7f\u7528SQLite\uff0c\u56e0\u6b64\u4e0d\u9700\u8981\u8fdb\u884c\u4efb\u4f55\u66f4\u6539\u3002<br \/>\n\u5728\u8fd9\u91cc\u6211\u4eec\u4f1a\u8bbe\u7f6eTIME_ZONE\u4e3a\u60a8\u81ea\u5df1\u6240\u5728\u7684\u65f6\u533a\u3002\u9ed8\u8ba4\u4e3a\u4e16\u754c\u6807\u51c6\u65f6\u95f4\uff0c\u5982\u679c\u60a8\u5728\u65e5\u672c\uff0c\u5219\u8bbe\u7f6e\u4e3aAsia\/Tokyo\u3002<\/p>\n<h2>\u5173\u4e8eINSTALLED_APPS<\/h2>\n<p>\u5728setting.py\u6587\u4ef6\u4e2d\u7684INSTALLED_APPS\u4e0b\uff0c\u9ed8\u8ba4\u5305\u542b\u4ee5\u4e0b\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">django.contrib.admin\u30fb\u30fb\u30fb\u7ba1\u7406(admin)\u30b5\u30a4\u30c8<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">django.contrib.auth\u30fb\u30fb\u30fb\u8a8d\u8a3c\u30b7\u30b9\u30c6\u30e0<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">django.contrib.contenttypes\u30fb\u30fb\u30fb\u30b3\u30f3\u30c6\u30f3\u30c4\u30bf\u30a4\u30d7\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">django.contrib.sessions\u30fb\u30fb\u30fb\u30bb\u30c3\u30b7\u30e7\u30f3\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">django.contrib.messages\u30fb\u30fb\u30fb\u30e1\u30c3\u30bb\u30fc\u30b8\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">django.contrib.staticfiles\u30fb\u30fb\u30fb\u9759\u7684\u30d5\u30a1\u30a4\u30eb\u306e\u7ba1\u7406\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af<\/ul>\n<h2>\u5982\u679c\u8981\u4f7f\u7528\u5176\u4ed6\u6570\u636e\u5e93\uff0c<\/h2>\n<p>\u7a0d\u540e\u6211\u4f1a\u5199\u3002<\/p>\n<h1>\u521b\u5efa\u6570\u636e\u5e93<\/h1>\n<h2>\u521b\u5efa\u684c\u5b50<\/h2>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u8868\u3002\u8bf7\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python manage.py migrate\r\n<\/code><\/pre>\n<p>\u8fc1\u79fb\u547d\u4ee4\u4f1a\u6839\u636eINSTALL_APPS\u7684\u914d\u7f6e\u4fe1\u606f\uff0c\u5728mysite\/setting.py\u6587\u4ef6\u7684\u6570\u636e\u5e93\u8bbe\u7f6e\u4e2d\uff0c\u6309\u9700\u521b\u5efa\u6240\u6709\u6570\u636e\u5e93\u7684\u8868\u683c\u3002<\/p>\n<h2>\u521b\u5efa\u6a21\u578b<\/h2>\n<p>Django \u9075\u5faa DRY \u539f\u5219\u3002DRY \u610f\u5473\u7740\u4e0d\u91cd\u590d\u76f8\u540c\u7684\u4e8b\u60c5\uff0c\u800c\u5728 Django \u4e2d\uff0c\u5197\u4f59\u662f\u6709\u5bb3\u7684\uff0c\u89c4\u8303\u5316\u624d\u662f\u597d\u7684\u3002\u56e0\u6b64\uff0c\u5728 Django \u4e2d\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5728\u4e00\u4e2a\u5730\u65b9\u5b9a\u4e49\u6570\u636e\u6a21\u578b\uff0c\u7136\u540e\u81ea\u52a8\u751f\u6210\u5404\u79cd\u6d3e\u751f\u7269\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8eab913a08637a6d66dc\/18-0.png\" alt=\"Django-ER.png\" \/><\/div>\n<p>\u57fa\u4e8e\u4e0a\u9762\u7684\u56fe\uff0c\u4f7f\u7528Python\u4ee3\u7801\u8868\u793a\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">from<\/span> <span class=\"nn\">django.db<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">models<\/span>\r\n\r\n\r\n<span class=\"k\">class<\/span> <span class=\"nc\">Question<\/span><span class=\"p\">(<\/span><span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">Model<\/span><span class=\"p\">):<\/span>\r\n    <span class=\"n\">question_text<\/span> <span class=\"o\">=<\/span> <span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">CharField<\/span><span class=\"p\">(<\/span><span class=\"n\">max_length<\/span><span class=\"o\">=<\/span><span class=\"mi\">200<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">pub_date<\/span> <span class=\"o\">=<\/span> <span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">DateTimeField<\/span><span class=\"p\">(<\/span><span class=\"s\">'date published'<\/span><span class=\"p\">)<\/span>\r\n\r\n\r\n<span class=\"k\">class<\/span> <span class=\"nc\">Choice<\/span><span class=\"p\">(<\/span><span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">Model<\/span><span class=\"p\">):<\/span>\r\n    <span class=\"n\">question<\/span> <span class=\"o\">=<\/span> <span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">ForeignKey<\/span><span class=\"p\">(<\/span><span class=\"n\">Question<\/span><span class=\"p\">,<\/span> <span class=\"n\">on_delete<\/span><span class=\"o\">=<\/span><span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">CASCADE<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">choice_text<\/span> <span class=\"o\">=<\/span> <span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">CharField<\/span><span class=\"p\">(<\/span><span class=\"n\">max_length<\/span><span class=\"o\">=<\/span><span class=\"mi\">200<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"n\">votes<\/span> <span class=\"o\">=<\/span> <span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">IntegerField<\/span><span class=\"p\">(<\/span><span class=\"n\">default<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u6bcf\u4e2a\u53d8\u91cf\u540d\u90fd\u662f\u673a\u5668\u53ef\u8bfb\u7684\u5b57\u6bb5\u540d\uff0c\u5e76\u4e14\u5b83\u4eec\u4e5f\u88ab\u7528\u4f5c\u6570\u636e\u5e93\u5217\u7684\u540d\u79f0\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u5728Field\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e2d\u6307\u5b9a\u4eba\u7c7b\u53ef\u8bfb\u7684\u5b57\u6bb5\u540d\u4f5c\u4e3a\u53ef\u9009\u9879\u3002\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4e3apub_date\u7684Field\u8bbe\u7f6e\u4e86\u4e00\u4e2a\u4eba\u7c7b\u53ef\u8bfb\u7684\u5b57\u6bb5\u540d\u3002<\/p>\n<p>\u5728Choice\u6a21\u578b\u7684question\u5b57\u6bb5\u5185\uff0cmodels.ForeignKey()\u7684on_delete=models.CASCADE\u53c2\u6570\u8868\u793a\u5f53\u53c2\u8003\u7684\u5916\u90e8\u952e\u5bf9\u5e94\u7684\u539f\u59cb\u6570\u636e\u88ab\u5220\u9664\u65f6\uff0c\u4e5f\u4f1a\u5220\u9664\u6b64\u6570\u636e\u3002<\/p>\n<h2>\u542f\u7528\u6a21\u578b<\/h2>\n<p>\u4e3a\u4e86\u8ba9\u4e4b\u524d\u5199\u7684\u6a21\u578b\u5728\u9879\u76ee\u4e2d\u88ab\u8bc6\u522b\uff0c\u9700\u8981\u544a\u8bc9\u9879\u76ee\u5b89\u88c5\u4e86polls\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>\u8981\u5c06\u5e94\u7528\u7a0b\u5e8f\u5305\u542b\u5230\u9879\u76ee\u4e2d\uff0c\u9700\u8981\u5c06\u5bf9\u5e94\u7684\u914d\u7f6e\u7c7b\u7684\u5f15\u7528\u6dfb\u52a0\u5230INSTALL_APPS\u4e2d\u3002\u6dfb\u52a0\u7684\u5185\u5bb9\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">INSTALLED_APPS<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s\">'polls.apps.PollsConfig'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'django.contrib.admin'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'django.contrib.auth'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'django.contrib.contenttypes'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'django.contrib.sessions'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'django.contrib.messages'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'django.contrib.staticfiles'<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">]<\/span>\r\n<\/code><\/pre>\n<p>\u5b8c\u6210\u6b64\u8bbe\u7f6e\u540e\uff0c\u5c06\u521b\u5efa\u6b64\u66f4\u6539\u7684\u8fc1\u79fb\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python manage.py makemigrations polls\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u8fd0\u884cmakemigrations\u547d\u4ee4\uff0c\u53ef\u4ee5\u5411Django\u4f20\u8fbe\u6a21\u578b\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u5e76\u5c06\u8fd9\u4e9b\u53d8\u5316\u4fdd\u5b58\u4e3a\u8fc1\u79fb\u6587\u4ef6\u7684\u5f62\u5f0f\u3002<\/p>\n<p>\u7136\u540e\uff0c\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5728\u6570\u636e\u5e93\u4e2d\u521b\u5efa\u6a21\u578b\u7684\u8868\u683c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python manage.py migrate\r\n<\/code><\/pre>\n<p>\u6211\u5df2\u7ecf\u5728\u6570\u636e\u5e93\u4e0a\u6210\u529f\u521b\u5efa\u4e86\u4e00\u4e2a\u8868\u683c\u3002<\/p>\n<h1>\u5c1d\u8bd5\u73a9\u4e00\u4e0bAPI<\/h1>\n<p>\u4e3a\u4e86\u4f7f\u7528Django\u63d0\u4f9b\u7684API\uff0c\u6211\u4eec\u9700\u8981\u542f\u52a8Python\u7ec8\u7aef\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python manage.py shell\r\n<\/code><\/pre>\n<p>\u5f53\u542f\u52a8Shell\u540e\uff0c\u6211\u4f1a\u9010\u6e10\u5c1d\u8bd5\u6570\u636e\u5e93API\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"kn\">from<\/span> <span class=\"nn\">polls.models<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">Choice<\/span><span class=\"p\">,<\/span> <span class=\"n\">Question<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">Question<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"nb\">all<\/span><span class=\"p\">()<\/span>\r\n<span class=\"o\">&lt;<\/span><span class=\"n\">QuerySet<\/span><span class=\"p\">[]<\/span><span class=\"o\">&gt;<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"kn\">from<\/span> <span class=\"nn\">django.utils<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">timezone<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"o\">=<\/span> <span class=\"n\">Question<\/span><span class=\"p\">(<\/span><span class=\"n\">question_text<\/span><span class=\"o\">=<\/span><span class=\"s\">\"What's new?\"<\/span><span class=\"p\">,<\/span><span class=\"n\">pub_date<\/span><span class=\"o\">=<\/span><span class=\"n\">timezone<\/span><span class=\"p\">.<\/span><span class=\"n\">now<\/span><span class=\"p\">())<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">save<\/span><span class=\"p\">()<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"nb\">id<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">question_text<\/span>\r\n<span class=\"s\">\"Whats new?\"<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">pub_date<\/span>\r\n<span class=\"n\">datetime<\/span><span class=\"p\">.<\/span><span class=\"n\">datetime<\/span><span class=\"p\">(<\/span><span class=\"mi\">2012<\/span><span class=\"p\">,<\/span> <span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"mi\">26<\/span><span class=\"p\">,<\/span> <span class=\"mi\">13<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">775217<\/span><span class=\"p\">,<\/span> <span class=\"n\">tzinfo<\/span><span class=\"o\">=&lt;<\/span><span class=\"n\">UTC<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">question_text<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"what's up?\"<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">save<\/span><span class=\"p\">()<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">Question<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"nb\">all<\/span><span class=\"p\">()<\/span>\r\n<span class=\"o\">&lt;<\/span><span class=\"n\">QuerySet<\/span> <span class=\"p\">[<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">Question<\/span><span class=\"p\">:<\/span> <span class=\"n\">Question<\/span> <span class=\"nb\">object<\/span> <span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">]<\/span><span class=\"o\">&gt;<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u6700\u5f8c\u4e00\u884c\u7684\u7ed3\u679c\u4e0a\u663e\u793a\u7740\uff0c\u5982\u6b64\u4fdd\u6301\u4e0b\u53bb\u6211\u5c31\u4e0d\u77e5\u9053\u91cc\u9762\u5b58\u50a8\u4e86\u4ec0\u4e48\u3002<br \/>\n\u4e3a\u4e86\u4fee\u6b63\u6b64\u95ee\u9898\uff0c\u6211\u4f1a\u5728Question\u548cChoice\u4e24\u4e2a\u5730\u65b9\u90fd\u52a0\u4e0astr()\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">from<\/span> <span class=\"nn\">django.db<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">models<\/span>\r\n\r\n<span class=\"k\">class<\/span> <span class=\"nc\">Question<\/span><span class=\"p\">(<\/span><span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">Model<\/span><span class=\"p\">):<\/span>\r\n    <span class=\"c1\"># ...\r\n<\/span>    <span class=\"k\">def<\/span> <span class=\"nf\">__str__<\/span><span class=\"p\">(<\/span><span class=\"bp\">self<\/span><span class=\"p\">):<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"bp\">self<\/span><span class=\"p\">.<\/span><span class=\"n\">question_text<\/span>\r\n\r\n<span class=\"k\">class<\/span> <span class=\"nc\">Choice<\/span><span class=\"p\">(<\/span><span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">Model<\/span><span class=\"p\">):<\/span>\r\n    <span class=\"c1\"># ...\r\n<\/span>    <span class=\"k\">def<\/span> <span class=\"nf\">__str__<\/span><span class=\"p\">(<\/span><span class=\"bp\">self<\/span><span class=\"p\">):<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"bp\">self<\/span><span class=\"p\">.<\/span><span class=\"n\">choice_text<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u4e2a\u529f\u80fd\u7684\u6dfb\u52a0\u5bf9\u4e8e\u7ba1\u7406\u5458\u6765\u8bf4\u4e5f\u5f88\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u63d0\u9ad8\u7ba1\u7406\u7684\u4fbf\u5229\u6027\u3002<\/p>\n<p>\u6211\u5011\u5c07\u5728\u6a21\u578b\u985e\u4e2d\u6dfb\u52a0\u4e00\u500b\u985e\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">import<\/span> <span class=\"nn\">datetime<\/span> <span class=\"c1\">#\u2190NEW!!\r\n<\/span>\r\n<span class=\"kn\">from<\/span> <span class=\"nn\">django.db<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">models<\/span>   \r\n<span class=\"kn\">from<\/span> <span class=\"nn\">django.utils<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">timezone<\/span> <span class=\"c1\">#\u2190NEW!!\r\n<\/span>\r\n\r\n<span class=\"k\">class<\/span> <span class=\"nc\">Question<\/span><span class=\"p\">(<\/span><span class=\"n\">models<\/span><span class=\"p\">.<\/span><span class=\"n\">Model<\/span><span class=\"p\">):<\/span>\r\n    <span class=\"c1\"># ...\r\n<\/span>    <span class=\"k\">def<\/span> <span class=\"nf\">was_published_recently<\/span><span class=\"p\">(<\/span><span class=\"bp\">self<\/span><span class=\"p\">):<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"bp\">self<\/span><span class=\"p\">.<\/span><span class=\"n\">pub_date<\/span> <span class=\"o\">&gt;=<\/span> <span class=\"n\">timezone<\/span><span class=\"p\">.<\/span><span class=\"n\">now<\/span><span class=\"p\">()<\/span> <span class=\"o\">-<\/span> <span class=\"n\">datetime<\/span><span class=\"p\">.<\/span><span class=\"n\">timedelta<\/span><span class=\"p\">(<\/span><span class=\"n\">days<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u7684was_published_recently()\u662f\u4e00\u4e2a\u7528\u4e8e\u5224\u65ad\u6570\u636e\u662f\u5426\u5728\u4e00\u5929\u5185\u66f4\u65b0\u7684\u51fd\u6570\u3002<\/p>\n<p>\u73b0\u5728\uff0c\u8bf7\u4fdd\u5b58\u66f4\u6539\u5e76\u91cd\u65b0\u542f\u52a8PythonShell\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"kn\">from<\/span> <span class=\"nn\">polls.models<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">Choice<\/span><span class=\"p\">,<\/span><span class=\"n\">Question<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">Question<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"nb\">all<\/span><span class=\"p\">()<\/span> <span class=\"c1\">#\u6587\u5b57\u5217\u3068\u3057\u3066\u8868\u793a\u3055\u308c\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u308b\u304b\u78ba\u8a8d\r\n#&lt;QuerySet [&lt;Question: What's up?&gt;]&gt;\r\n<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"n\">Question<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"nb\">filter<\/span><span class=\"p\">(<\/span><span class=\"nb\">id<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span> \r\n<span class=\"c1\">#&lt;QuerySet [&lt;Question: What's up?&gt;]&gt;\r\n<\/span><span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"n\">Question<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"nb\">filter<\/span><span class=\"p\">(<\/span><span class=\"n\">question_text__startswith<\/span><span class=\"o\">=<\/span><span class=\"s\">'What'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"c1\">#&lt;QuerySet [&lt;Question: What's up?&gt;]&gt;\r\n<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"kn\">from<\/span> <span class=\"nn\">django.utils<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">timezone<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">current_year<\/span> <span class=\"o\">=<\/span> <span class=\"n\">timezone<\/span><span class=\"p\">.<\/span><span class=\"n\">now<\/span><span class=\"p\">().<\/span><span class=\"n\">year<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">Question<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"n\">get<\/span><span class=\"p\">(<\/span><span class=\"n\">pub_date__year<\/span><span class=\"o\">=<\/span><span class=\"n\">current_year<\/span><span class=\"p\">)<\/span>\r\n<span class=\"c1\">#&lt;Question: What's up?&gt;\r\n<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">Question<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"n\">get<\/span><span class=\"p\">(<\/span><span class=\"n\">pk<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span> <span class=\"c1\">#\u30d7\u30e9\u30a4\u30de\u30ea\u30ad\u30fc\u304c1\u306e\u3082\u306e\u3092\u691c\u7d22\r\n#&lt;Question: What's up?&gt;\r\n<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">was_published_recently<\/span><span class=\"p\">()<\/span> <span class=\"c1\">#1\u65e5\u4ee5\u5185\u306b\u6295\u7a3f\u3055\u308c\u305f\u3082\u306e\u304b\u78ba\u8a8d\r\n<\/span><span class=\"bp\">True<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"n\">q<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Question<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"n\">get<\/span><span class=\"p\">(<\/span><span class=\"n\">pk<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">choice_set<\/span><span class=\"p\">.<\/span><span class=\"nb\">all<\/span><span class=\"p\">()<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">choice_set<\/span><span class=\"p\">.<\/span><span class=\"n\">create<\/span><span class=\"p\">(<\/span><span class=\"n\">choice_text<\/span><span class=\"o\">=<\/span><span class=\"s\">\"Not much\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">votes<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"p\">)<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">choice_set<\/span><span class=\"p\">.<\/span><span class=\"n\">create<\/span><span class=\"p\">(<\/span><span class=\"n\">choice_text<\/span><span class=\"o\">=<\/span><span class=\"s\">\"The sky\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">votes<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"p\">)<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"n\">c<\/span><span class=\"o\">=<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">choice_set<\/span><span class=\"p\">.<\/span><span class=\"n\">create<\/span><span class=\"p\">(<\/span><span class=\"n\">choice_text<\/span><span class=\"o\">=<\/span><span class=\"s\">\"Just hacking again\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">votes<\/span><span class=\"o\">=<\/span><span class=\"mi\">0<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">c<\/span><span class=\"p\">.<\/span><span class=\"n\">question<\/span>\r\n<span class=\"c1\">#&lt;Question: What's up?&gt;\r\n<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">choice_set<\/span><span class=\"p\">.<\/span><span class=\"nb\">all<\/span><span class=\"p\">()<\/span>\r\n<span class=\"c1\">#&lt;QuerySet [&lt;Choice: Not much&gt;, &lt;Choice: The sky&gt;, &lt;Choice: Just hacking again&gt;]&gt;\r\n<\/span><span class=\"o\">&gt;&gt;&gt;<\/span><span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">choice_set<\/span><span class=\"p\">.<\/span><span class=\"n\">count<\/span><span class=\"p\">()<\/span>\r\n<span class=\"mi\">3<\/span>\r\n\r\n<span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"n\">Choice<\/span><span class=\"p\">.<\/span><span class=\"n\">objects<\/span><span class=\"p\">.<\/span><span class=\"nb\">filter<\/span><span class=\"p\">(<\/span><span class=\"n\">question__pub_date__year<\/span><span class=\"o\">=<\/span><span class=\"n\">current_year<\/span><span class=\"p\">)<\/span>\r\n<span class=\"c1\">#&lt;QuerySet [&lt;Choice: Not much&gt;, &lt;Choice: The sky&gt;, &lt;Choice: Just hacking again&gt;]&gt;\r\n<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"n\">q<\/span><span class=\"p\">.<\/span><span class=\"n\">choice_set<\/span><span class=\"p\">.<\/span><span class=\"nb\">filter<\/span><span class=\"p\">(<\/span><span class=\"n\">choice_text__startswith<\/span><span class=\"o\">=<\/span><span class=\"s\">'Just hacking'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"n\">c<\/span><span class=\"p\">.<\/span><span class=\"n\">delete<\/span><span class=\"p\">()<\/span>\r\n<\/code><\/pre>\n<h1>&#8220;Django\u7ba1\u7406\u540e\u53f0&#8221;<\/h1>\n<p>Django Admin\u81ea\u52a8\u5316\u751f\u6210\u7ba1\u7406\u7f51\u7ad9\u4ee5\u8fdb\u884c\u9875\u9762\u66f4\u6539\u548c\u5220\u9664\u7684\u529f\u80fd\u3002<\/p>\n<h2>\u521b\u5efa\u7ba1\u7406\u5458\u7528\u6237<\/h2>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u7528\u4e8e\u8bbf\u95ee\u7ba1\u7406\u5458\u7f51\u7ad9\u7684\u7528\u6237\u3002\u4e3a\u6b64\uff0c\u8bf7\u6267\u884c\u4e0b\u9762\u7684\u547d\u4ee4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python manage.py createsuperuser\r\n<\/code><\/pre>\n<p>\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u4ee5\u4e0b\u9519\u8bef\u3002<\/p>\n<pre class=\"post-pre\"><code>Superuser creation skipped due to not running <span class=\"k\">in <\/span>a TTY. You can run manage.py createsuperuser <span class=\"k\">in <\/span>your project to create one manually. \r\n<\/code><\/pre>\n<p>\u8bf7\u6267\u884c\u4ee5\u4e0b\u547d\u4ee4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>winpty python manage.py createsuperuser\r\n<\/code><\/pre>\n<p>\u8bf7\u8fdb\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<br \/>\n1. \u8fdb\u5165\u8f93\u5165\u7b49\u5f85\u72b6\u6001<br \/>\n2. \u8f93\u5165\u60a8\u559c\u6b22\u7684\u7528\u6237\u540d<br \/>\n3. \u8bbe\u7f6e\u7535\u5b50\u90ae\u4ef6<br \/>\n4. \u8bbe\u7f6e\u5bc6\u7801<\/p>\n<pre class=\"post-pre\"><code>Username: <span class=\"o\">(<\/span>username<span class=\"o\">)<\/span>\r\n\r\nEmail address: hogehoge@example.com\r\n\r\nPassword: <span class=\"k\">********<\/span>\r\nPassword<span class=\"o\">(<\/span>again<span class=\"o\">)<\/span>: <span class=\"k\">********<\/span>\r\nSuperuser created successfully.\r\n<\/code><\/pre>\n<h2>\u542f\u52a8\u5f00\u53d1\u670d\u52a1\u5668<\/h2>\n<p>Django\u7684\u7ba1\u7406\u5458\u7f51\u7ad9\u9ed8\u8ba4\u5df2\u542f\u7528\uff0c\u53ea\u9700\u542f\u52a8\u5f00\u53d1\u670d\u52a1\u5668\u5373\u53ef\u8bbf\u95ee\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nv\">$ <\/span>python manage.py runserver\r\n<\/code><\/pre>\n<p>\u4e0b\u4e00\u6b65\u8981\u8bbf\u95ee http:\/\/127.0.0.1:8000\/admin\/\u3002<br \/>\n\u7136\u540e\uff0c\u5e94\u8be5\u4f1a\u663e\u793a\u7ba1\u7406\u5458\u767b\u5f55\u9875\u9762\u3002<\/p>\n<p>\u8fdb\u5165\u7ba1\u7406\u5458\u7f51\u7ad9\u540e\uff0c\u4f1a\u663e\u793a\u201c\u7fa4\u7ec4\u201d\u548c\u201c\u7528\u6237\u201d\uff0c\u4f46\u6ca1\u6709\u201c\u6295\u7968\u201d\u5e94\u7528\u7684\u7ba1\u7406\u754c\u9762\u3002<\/p>\n<p>\u8981\u4f7f\u7ba1\u7406\u5458\u80fd\u591f\u5728\u540e\u53f0\u4e0a\u8fdb\u884c\u7f16\u8f91\uff0c\u9700\u8981\u7f16\u8f91polls\/admin.py\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">from<\/span> <span class=\"nn\">django.contrib<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">admin<\/span>\r\n\r\n<span class=\"kn\">from<\/span> <span class=\"nn\">.models<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">Question<\/span>\r\n\r\n<span class=\"n\">admin<\/span><span class=\"p\">.<\/span><span class=\"n\">site<\/span><span class=\"p\">.<\/span><span class=\"n\">register<\/span><span class=\"p\">(<\/span><span class=\"n\">Question<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u8fdb\u884c\u4ee5\u4e0a\u8bbe\u7f6e\u5c06\u5728admin\u7f51\u7ad9\u4e0a\u663e\u793a&#8221;Questions&#8221;\u7684\u8bbe\u7f6e\u3002<\/p>\n<h1>\u603b\u7ed3<\/h1>\n<p>\u6211\u5011\u9019\u6b21\u9032\u884c\u4e86\u95dc\u65bc\u6578\u64da\u5eab\u53ca\u5176\u7ba1\u7406\u7684\u8a2d\u5b9a\u3002\u7b2c\u4e09\u500b\u4e5f\u5c07\u5f88\u5feb\u52a0\u5165\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u8fd9\u7bc7\u6587\u7ae0\u662f\u5173\u4e8e\u7b2c\u4e00\u6b21\u521b\u5efa Django \u5e94\u7528\u7a0b\u5e8f\u7684\u5907\u5fd8\u5f55\uff0c\u8fd9\u662f\u7b2c\u4e8c\u90e8\u5206\u3002 \u7b2c\u4e00\u90e8\u5206\u5728\u8fd9\u91cc\u2192 Django [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-50042","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - 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