{"id":49931,"date":"2023-02-10T04:46:04","date_gmt":"2023-12-13T11:05:44","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/django%e4%bf%a1%e5%8f%b7%e7%9a%84%e7%b1%bb%e5%9e%8b%e5%92%8c%e4%bd%bf%e7%94%a8%e6%96%b9%e5%bc%8f%e3%80%82\/"},"modified":"2024-04-29T13:57:36","modified_gmt":"2024-04-29T05:57:36","slug":"django%e4%bf%a1%e5%8f%b7%e7%9a%84%e7%b1%bb%e5%9e%8b%e5%92%8c%e4%bd%bf%e7%94%a8%e6%96%b9%e5%bc%8f%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/django%e4%bf%a1%e5%8f%b7%e7%9a%84%e7%b1%bb%e5%9e%8b%e5%92%8c%e4%bd%bf%e7%94%a8%e6%96%b9%e5%bc%8f%e3%80%82\/","title":{"rendered":"Django\u4fe1\u53f7\u7684\u7c7b\u578b\u548c\u4f7f\u7528\u65b9\u5f0f"},"content":{"rendered":"<h1>\u7b80\u800c\u8a00\u4e4b<\/h1>\n<h3>Signal\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u5f53\u6570\u636e\u53d1\u751f\u66f4\u65b0\u6216\u8bf7\u6c42\u53d1\u751f\u65f6\uff0c\u53ef\u4ee5\u6267\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002<br \/>\n\u4f8b\u5982\uff0c\u5728\u60f3\u8981\u901a\u77e5\u6570\u636e\u5df2\u521b\u5efa\u6216\u540c\u65f6\u521b\u5efa\u5176\u4ed6\u6570\u636e\u65f6\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n<p>Django \u5b98\u65b9\u6587\u6863<\/p>\n<h3>\u5728\u54ea\u91cc\u5199\u6bd4\u8f83\u597d\uff1f<\/h3>\n<p>\u6839\u636e\u5b98\u65b9\u7f51\u7ad9<\/p>\n<blockquote><p>\u4e25\u683c\u6765\u8bf4\uff0c\u4fe1\u53f7\u5904\u7406\u548c\u6ce8\u518c\u4ee3\u7801\u53ef\u4ee5\u653e\u5728\u4efb\u4f55\u4f60\u559c\u6b22\u7684\u5730\u65b9\uff0c\u5c3d\u7ba1\u5efa\u8bae\u907f\u514d\u653e\u5728\u5e94\u7528\u7684\u6839\u6a21\u5757\u548c\u6a21\u578b\u6a21\u5757\u4e2d\uff0c\u4ee5\u6700\u5c0f\u5316\u5bfc\u5165\u4ee3\u7801\u7684\u526f\u4f5c\u7528\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a\uff0c\u4fe1\u53f7\u5904\u7406\u7a0b\u5e8f\u901a\u5e38\u5b9a\u4e49\u5728\u4e0e\u5176\u76f8\u5173\u7684\u5e94\u7528\u7a0b\u5e8f\u7684\u4fe1\u53f7\u5b50\u6a21\u5757\u4e2d\u3002\u4fe1\u53f7\u63a5\u6536\u5668\u5728\u5e94\u7528\u7a0b\u5e8f\u914d\u7f6e\u7c7b\u7684ready()\u65b9\u6cd5\u4e2d\u8fde\u63a5\u3002 \u5982\u679c\u4f7f\u7528receiver()\u88c5\u9970\u5668\uff0c\u8bf7\u5728ready()\u4e2d\u5bfc\u5165\u4fe1\u53f7\u5b50\u6a21\u5757\u3002<\/p><\/blockquote>\n<p>\u6211\u5b8c\u5168\u4e0d\u77e5\u9053\u610f\u601d\uff0c\u4f46\u4f3c\u4e4e\u5b9a\u4e49\u4e3a\u4e00\u4e2a\u5b50\u6a21\u5757\u662f\u4e2a\u597d\u4e3b\u610f\u3002<br \/>\n\u6240\u4ee5\u6211\u521b\u5efa\u4e86 signals.py\uff01<\/p>\n<h3>\u5206\u7c7b<\/h3>\n<p>\u6211\u80fd\u505a\u4ec0\u4e48\u5462\uff1f<\/p>\n<div>\n<div class=\"post-table\">\u540d\u524d\u610f\u5473pre_init\u30e2\u30c7\u30eb\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u305f\u6700\u521dpost_init\u30e2\u30c7\u30eb\u3092\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u305f\u6700\u5f8cpre_save\u30e2\u30c7\u30eb\u306esave()\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u521dpost_save\u30e2\u30c7\u30eb\u306esave()\u30e1\u30bd\u30c3\u30c9\u306e\u6700\u5f8cm2m_changed\u4e2d\u9593\u30c6\u30fc\u30d6\u30eb\u306e\u5909\u66f4pre_migratemigrate\u3092\u5b9f\u884c\u3059\u308b\u524dpost_migratemigrate\u3092\u5b9f\u884c\u3057\u305f\u5f8crequest_startedHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5fdc\u7b54\u3057\u305f\u6700\u521drequest_finishedHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u5fdc\u7b54\u3057\u305f\u6700\u5f8cgot_request_exceptionHTTP\u30ea\u30af\u30a8\u30b9\u30c8\u4e2d\u306b\u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u3089connection_createdDB\u306e\u63a5\u7d9a\u304c\u958b\u59cb\u3055\u308c\u305f\u3089<\/div>\n<\/div>\n<p>\u867d\u7136 Django \u5b98\u65b9\u7f51\u7ad9\u4e0a\u8fd8\u6709\u4e00\u4e9b\u79cd\u7c7b\uff0c\u4f46\u6211\u5f88\u56f0\u4e86\u3002\uff08\u76ee\u524d\u51cc\u66682:38\uff09??<\/p>\n<h1>\u7528\u6cd5 f\u01ce)<\/h1>\n<p>\u4e3a\u4e86\u8ba9Django\u8bc6\u522b\u63a5\u53d7\u8005\uff0c\u9700\u8981\u8fdb\u884c\u4e00\u4e9b\u51c6\u5907\u5de5\u4f5c\u3002<br \/>\n\u987a\u4fbf\u63d0\u4e00\u53e5\uff0c\u8fd9\u4e2a\u5e94\u7528\u7a0b\u5e8f\u7684\u540d\u5b57\u662f\u201cbook\u201d\uff0c\u662f\u4e00\u4e2a\u795e\u79d8\u7684\u540d\u5b57???<\/p>\n<h3>AppConfig\u5df2\u51c6\u5907\u597d\u3002<\/h3>\n<p>\u5c06settings.py\u6587\u4ef6\u4e2d\u7684AppConfig\u8fdb\u884c\u53c2\u8003\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">DJANGO_APPS<\/span> <span class=\"o\">=<\/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<span class=\"n\">THIRD_PARTY_APPS<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s\">'rest_framework'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'django_filters'<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">]<\/span>\r\n\r\n<span class=\"n\">LOCAL_APPS<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span>\r\n    <span class=\"s\">'common.apps.CommonConfig'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"s\">'book.apps.BookConfig'<\/span><span class=\"p\">,<\/span> <span class=\"c1\"># &lt;- \u3053\u3044\u3064\r\n<\/span><span class=\"p\">]<\/span>\r\n\r\n<span class=\"n\">INSTALLED_APPS<\/span> <span class=\"o\">=<\/span> <span class=\"n\">DJANGO_APPS<\/span> <span class=\"o\">+<\/span> <span class=\"n\">THIRD_PARTY_APPS<\/span> <span class=\"o\">+<\/span> <span class=\"n\">LOCAL_APPS<\/span>\r\n<\/code><\/pre>\n<p>\u9700\u8981\u5bfc\u5165 app.py \u548c signals.py\u3002???<\/p>\n<pre class=\"post-pre\"><code>\r\n<span class=\"kn\">from<\/span> <span class=\"nn\">django.apps<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">AppConfig<\/span>\r\n<span class=\"kn\">from<\/span> <span class=\"nn\">django.utils.translation<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">ugettext_lazy<\/span> <span class=\"k\">as<\/span> <span class=\"n\">_<\/span>\r\n\r\n\r\n<span class=\"k\">class<\/span> <span class=\"nc\">BookConfig<\/span><span class=\"p\">(<\/span><span class=\"n\">AppConfig<\/span><span class=\"p\">):<\/span>\r\n    <span class=\"n\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">'book'<\/span>\r\n    <span class=\"n\">verbose_name<\/span> <span class=\"o\">=<\/span> <span class=\"n\">_<\/span><span class=\"p\">(<\/span><span class=\"s\">'Book'<\/span><span class=\"p\">)<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">ready<\/span><span class=\"p\">(<\/span><span class=\"bp\">self<\/span><span class=\"p\">):<\/span>\r\n        <span class=\"k\">try<\/span><span class=\"p\">:<\/span>\r\n            <span class=\"kn\">import<\/span> <span class=\"nn\">book.signals<\/span>\r\n        <span class=\"k\">except<\/span> <span class=\"nb\">ImportError<\/span><span class=\"p\">:<\/span>\r\n            <span class=\"k\">pass<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u65e2\u7136\u51c6\u5907\u5de5\u4f5c\u5df2\u7ecf\u5b8c\u6210\uff0c\u90a3\u4e48\u5c31\u8ba9\u6211\u4eec\u5f00\u59cb\u5728 signals.py \u6587\u4ef6\u4e2d\u7ee7\u7eed\u5f80\u4e0b\u5199\u5427~ ????<\/p>\n<h3>\u5199\u4e0b\u63a5\u6536\u8005<\/h3>\n<p>\u5199\u4e00\u4e2a\u63a5\u6536\u5668\u88c5\u9970\u5668\uff0c\u57fa\u672c\u4e0a\u5b83\u53ef\u4ee5\u6267\u884c\u263a\ufe0f\u263a\ufe0f<\/p>\n<p>\u6240\u4ee5\uff0c\u4ee5\u4e0b\u662fpre_save\u7684\u5199\u4f5c\u65b9\u5f0f\u7684\u793a\u4f8b\uff01\uff01\uff01\uff01<\/p>\n<pre class=\"post-pre\"><code>\r\n<span class=\"kn\">from<\/span> <span class=\"nn\">django.db.models.signals<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">pre_save<\/span>\r\n<span class=\"kn\">from<\/span> <span class=\"nn\">django.dispatch<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">receiver<\/span>\r\n\r\n<span class=\"kn\">from<\/span> <span class=\"nn\">.models<\/span> <span class=\"kn\">import<\/span> <span class=\"n\">Book<\/span>\r\n\r\n\r\n<span class=\"o\">@<\/span><span class=\"n\">receiver<\/span><span class=\"p\">(<\/span><span class=\"n\">pre_save<\/span><span class=\"p\">,<\/span> <span class=\"n\">sender<\/span><span class=\"o\">=<\/span><span class=\"n\">Book<\/span><span class=\"p\">)<\/span>\r\n<span class=\"k\">def<\/span> <span class=\"nf\">sample<\/span><span class=\"p\">(<\/span><span class=\"n\">sender<\/span><span class=\"p\">,<\/span> <span class=\"o\">*<\/span><span class=\"n\">args<\/span><span class=\"p\">,<\/span> <span class=\"o\">**<\/span><span class=\"n\">kwargs<\/span><span class=\"p\">):<\/span>\r\n    <span class=\"k\">print<\/span><span class=\"p\">(<\/span><span class=\"n\">sender<\/span><span class=\"p\">,<\/span> <span class=\"n\">args<\/span><span class=\"p\">,<\/span> <span class=\"n\">kwargs<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u5728views.py\u6216\u5176\u4ed6\u5730\u65b9\u5bf9\u6a21\u578b\u5bf9\u8c61\u8fdb\u884csave()\u64cd\u4f5c\u540e\uff0c\u4f1a\u6267\u884csample()\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code>\r\n<span class=\"k\">class<\/span> <span class=\"nc\">ListBook<\/span><span class=\"p\">(<\/span><span class=\"n\">APIView<\/span><span class=\"p\">):<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">get<\/span><span class=\"p\">(<\/span><span class=\"bp\">self<\/span><span class=\"p\">,<\/span> <span class=\"n\">request<\/span><span class=\"p\">):<\/span>\r\n        <span class=\"n\">b<\/span> <span class=\"o\">=<\/span> <span class=\"n\">Book<\/span><span class=\"p\">(<\/span><span class=\"c1\"># \u30b4\u30cb\u30e7\u30b4\u30cb\u30e7\u3044\u308c\u308b)\r\n<\/span>        <span class=\"n\">b<\/span><span class=\"p\">.<\/span><span class=\"n\">save<\/span><span class=\"p\">()<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">Response<\/span><span class=\"p\">(<\/span><span class=\"s\">'success'<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u90a3\u4e48\u5c31\u8fd9\u6837\u5427\u263a\ufe0f\u263a\ufe0f\u263a\ufe0f\u263a\ufe0f<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7b80\u800c\u8a00\u4e4b Signal\u662f\u4ec0\u4e48\uff1f \u5f53\u6570\u636e\u53d1\u751f\u66f4\u65b0\u6216\u8bf7\u6c42\u53d1\u751f\u65f6\uff0c\u53ef\u4ee5\u6267\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002 \u4f8b\u5982\uff0c\u5728\u60f3\u8981\u901a\u77e5\u6570\u636e\u5df2\u521b\u5efa\u6216 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-49931","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) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Django\u4fe1\u53f7\u7684\u7c7b\u578b\u548c\u4f7f\u7528\u65b9\u5f0f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/django\u4fe1\u53f7\u7684\u7c7b\u578b\u548c\u4f7f\u7528\u65b9\u5f0f\u3002\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Django\u4fe1\u53f7\u7684\u7c7b\u578b\u548c\u4f7f\u7528\u65b9\u5f0f\" \/>\n<meta property=\"og:description\" content=\"\u7b80\u800c\u8a00\u4e4b Signal\u662f\u4ec0\u4e48\uff1f \u5f53\u6570\u636e\u53d1\u751f\u66f4\u65b0\u6216\u8bf7\u6c42\u53d1\u751f\u65f6\uff0c\u53ef\u4ee5\u6267\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002 \u4f8b\u5982\uff0c\u5728\u60f3\u8981\u901a\u77e5\u6570\u636e\u5df2\u521b\u5efa\u6216 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/django\u4fe1\u53f7\u7684\u7c7b\u578b\u548c\u4f7f\u7528\u65b9\u5f0f\u3002\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-12-13T11:05:44+00:00\" 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