{"id":4687,"date":"2025-01-26T07:13:36","date_gmt":"2025-01-25T22:13:36","guid":{"rendered":"https:\/\/secondlife.lol\/?p=4687"},"modified":"2025-01-26T19:18:20","modified_gmt":"2025-01-26T10:18:20","slug":"django-models-basics-database-structure-guide","status":"publish","type":"post","link":"https:\/\/secondlife.lol\/zh\/django-models-basics-database-structure-guide\/","title":{"rendered":"Django \u6a21\u578b\u57fa\u7840\u77e5\u8bc6\uff1a\u8f7b\u677e\u7406\u89e3\u6570\u636e\u5e93\u7ed3\u6784\u7684\u5b8c\u6574\u6307\u5357"},"content":{"rendered":"<p class=\"wp-block-paragraph\">\u5927\u5bb6\u597d\uff01\u4eca\u5929\u6211\u4eec\u5c06\u5b66\u4e60 Django \u6a21\u578b\u7684\u57fa\u7840\u77e5\u8bc6\u3002 \u8ba9\u6211\u4eec\u4ece\u7b2c\u4e00\u4e2a <a href=\"https:\/\/www.djangoproject.com\/\" target=\"_blank\" rel=\"noopener\">Django<\/a>\u6a21\u578b\u7684\u6982\u5ff5\u4f3c\u4e4e\u6709\u70b9\u964c\u751f\u548c\u4ee4\u4eba\u751f\u754f--\u6211\u77e5\u9053\u5bf9\u6211\u6765\u8bf4\u786e\u5b9e\u5982\u6b64\u3002\u4e0d\u8fc7\u4e0d\u7528\u62c5\u5fc3\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4f1a\u8ba9\u4f60\u5f7b\u5e95\u4e86\u89e3 Django \u6a21\u578b\u548c\u6570\u636e\u5e93\u7ed3\u6784\u7684\u57fa\u7840\u77e5\u8bc6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Django \u6a21\u578b\u662f\u6570\u636e\u5e93\u8bbe\u8ba1\u7684\u6838\u5fc3--\u5b83\u662f\u4e00\u79cd\u795e\u5947\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u8ba9\u60a8\u4f7f\u7528 Python \u4ee3\u7801\u64cd\u4f5c\u6570\u636e\u5e93\uff0c\u800c\u65e0\u9700\u590d\u6742\u7684 SQL \u67e5\u8be2\u3002 \u5728\u672c\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u4ecb\u7ecd\u5173\u4e8e Django \u6a21\u578b\u7684\u6240\u6709\u77e5\u8bc6\uff0c\u4ece\u57fa\u672c\u6982\u5ff5\u5230\u5b9e\u9645\u4ee3\u7801\u793a\u4f8b\u3002 \u90a3\u4e48\uff0c\u8ba9\u6211\u4eec\u5f00\u59cb\u5427\uff01<\/p>\n\n\n<style>.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-content-wrap{padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-right:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);padding-left:var(--global-kb-spacing-sm, 1.5rem);border-top:3px solid var(--global-palette2, #2B6CB0);border-right:3px solid var(--global-palette2, #2B6CB0);border-bottom:3px solid var(--global-palette2, #2B6CB0);border-left:3px solid var(--global-palette2, #2B6CB0);border-top-left-radius:5px;border-top-right-radius:5px;border-bottom-right-radius:5px;border-bottom-left-radius:5px;box-shadow:0px 0px 14px 0px rgba(0, 0, 0, 0.2);}.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-contents-title-wrap{padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;}.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-contents-title-wrap{color:var(--global-palette2, #2B6CB0);}.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-contents-title{color:var(--global-palette2, #2B6CB0);font-size:28px;font-weight:regular;font-style:normal;}.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-content-wrap .kb-table-of-content-list{color:var(--global-palette1, #3182CE);line-height:2em;font-weight:regular;font-style:normal;margin-top:var(--global-kb-spacing-sm, 1.5rem);margin-right:0px;margin-bottom:0px;margin-left:0px;}.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-content-wrap .kb-table-of-content-list .kb-table-of-contents__entry:hover{color:var(--global-palette6, #718096);}@media all and (max-width: 1024px){.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-content-wrap{border-top:3px solid var(--global-palette2, #2B6CB0);border-right:3px solid var(--global-palette2, #2B6CB0);border-bottom:3px solid var(--global-palette2, #2B6CB0);border-left:3px solid var(--global-palette2, #2B6CB0);}}@media all and (max-width: 1024px){.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-contents-title{font-size:28px;}}@media all and (max-width: 767px){.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-content-wrap{border-top:3px solid var(--global-palette2, #2B6CB0);border-right:3px solid var(--global-palette2, #2B6CB0);border-bottom:3px solid var(--global-palette2, #2B6CB0);border-left:3px solid var(--global-palette2, #2B6CB0);}.kb-table-of-content-nav.kb-table-of-content-id83_5f28a6-34 .kb-table-of-contents-title{font-size:28px;}}<\/style>\n\n\n<h2 class=\"wp-block-heading\">\u4ec0\u4e48\u662f Django \u6a21\u578b\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Django \u6a21\u578b\u5c06\u6570\u636e\u5e93\u7ed3\u6784\u4f5c\u4e3a <a href=\"https:\/\/secondlife.lol\/zh\/mastering-python-classes-for-beginners\/\" data-type=\"post\" data-id=\"3597\">Python \u7c7b<\/a>\u6bcf\u4e2a\u6a21\u578b\u5bf9\u5e94\u6570\u636e\u5e93\u4e2d\u7684\u4e00\u4e2a\u8868\uff0c\u6a21\u578b\u7684\u5c5e\u6027\u6210\u4e3a\u8868\u4e2d\u7684\u5b57\u6bb5\u3002Django \u4f7f\u7528\u8be5\u6a21\u578b\u6765\u62bd\u8c61\u6570\u636e\u5e93\u64cd\u4f5c\uff0c\u4f7f\u5f00\u53d1\u4eba\u5458\u66f4\u5bb9\u6613\u5904\u7406\u6570\u636e\u3002<\/p>\n\n\n<style>.wp-block-kadence-column.kb-section-dir-horizontal > .kt-inside-inner-col > .kt-info-box4687_4c0615-a4 .kt-blocks-info-box-link-wrap{max-width:unset;}.kt-info-box4687_4c0615-a4 .kt-blocks-info-box-link-wrap{border-top:5px solid var(--global-palette7, #eeeeee);border-right:5px solid var(--global-palette7, #eeeeee);border-bottom:5px solid var(--global-palette7, #eeeeee);border-left:5px solid var(--global-palette7, #eeeeee);background:#ffffff;padding-top:var(--global-kb-spacing-sm, 1.5rem);padding-right:var(--global-kb-spacing-sm, 1.5rem);padding-bottom:var(--global-kb-spacing-sm, 1.5rem);padding-left:var(--global-kb-spacing-sm, 1.5rem);margin-top:50px;}.kt-info-box4687_4c0615-a4 .kadence-info-box-icon-container .kt-info-svg-icon, .kt-info-box4687_4c0615-a4 .kt-info-svg-icon-flip, .kt-info-box4687_4c0615-a4 .kt-blocks-info-box-number{font-size:50px;}.kt-info-box4687_4c0615-a4 .kt-blocks-info-box-media{background:#ffffff;border-color:var(--global-palette7, #eeeeee);border-top-width:5px;border-right-width:5px;border-bottom-width:5px;border-left-width:5px;padding-top:20px;padding-right:20px;padding-bottom:20px;padding-left:20px;}.kt-info-box4687_4c0615-a4 .kt-blocks-info-box-media-container{margin-top:-75px;margin-right:0px;margin-bottom:20px;margin-left:0px;}.kt-info-box4687_4c0615-a4 .kt-infobox-textcontent h5.kt-blocks-info-box-title{padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;margin-top:5px;margin-right:0px;margin-bottom:10px;margin-left:0px;}.kt-info-box4687_4c0615-a4 .kt-infobox-textcontent .kt-blocks-info-box-text{color:var(--global-palette5, #4A5568);}.kt-info-box4687_4c0615-a4 .kt-blocks-info-box-learnmore{background:transparent;border-width:0px 0px 0px 0px;padding-top:4px;padding-right:8px;padding-bottom:4px;padding-left:8px;margin-top:10px;margin-right:0px;margin-bottom:10px;margin-left:0px;}@media all and (max-width: 1024px){.kt-info-box4687_4c0615-a4 .kt-blocks-info-box-link-wrap{border-top:5px solid var(--global-palette7, #eeeeee);border-right:5px solid var(--global-palette7, #eeeeee);border-bottom:5px solid var(--global-palette7, #eeeeee);border-left:5px solid var(--global-palette7, #eeeeee);}}@media all and (max-width: 767px){.kt-info-box4687_4c0615-a4 .kt-blocks-info-box-link-wrap{border-top:5px solid var(--global-palette7, #eeeeee);border-right:5px solid var(--global-palette7, #eeeeee);border-bottom:5px solid var(--global-palette7, #eeeeee);border-left:5px solid var(--global-palette7, #eeeeee);}}<\/style>\n<div class=\"wp-block-kadence-infobox kt-info-box4687_4c0615-a4\"><span class=\"kt-blocks-info-box-link-wrap info-box-link kt-blocks-info-box-media-align-top kt-info-halign-left\"><div class=\"kt-blocks-info-box-media-container\"><div class=\"kt-blocks-info-box-media kt-info-media-animate-none\"><div class=\"kadence-info-box-icon-container kt-info-icon-animate-none\"><div class=\"kadence-info-box-icon-inner-container\"><span class=\"kb-svg-icon-wrap kb-svg-icon-fe_bookOpen kt-info-svg-icon\"><svg viewbox=\"0 0 24 24\"  fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"  aria-hidden=\"true\"><path d=\"M2 3h6a4 4 0 0 1 4 4v14a3 3 0 0 0-3-3H2z\"\/><path d=\"M22 3h-6a4 4 0 0 0-4 4v14a3 3 0 0 1 3-3h7z\"\/><\/svg><\/span><\/div><\/div><\/div><\/div><div class=\"kt-infobox-textcontent\"><h5 class=\"kt-blocks-info-box-title\">\u6570\u636e\u5e93\u7ed3\u6784\uff08\u8868\u548c\u5b57\u6bb5\uff09<\/h5><p class=\"kt-blocks-info-box-text\"><br><strong>\u6570\u636e\u5e93\u8868\u683c<\/strong>\u662f <strong>\u4e00\u5f20<\/strong>\u4e3e\u4e2a\u4f8b\u5b50\u3002Excel \u5de5\u4f5c\u8868\u6709\u591a\u884c\uff08\u884c\uff09\u548c\u591a\u5217\uff08\u5217\uff09\uff0c\u5bf9\u5417\uff1f \u540c\u6837\uff0c\u8868\u683c\u4e2d\u7684\u6570\u636e\u4e5f\u5206\u4e3a\u884c\uff08\u8bb0\u5f55\uff09\u548c\u5217\uff08\u5b57\u6bb5\uff09\u3002<br>  - \u884c\uff1a\u4ee3\u8868\u5355\u4e2a\u6570\u636e\u3002\u4f8b\u5982\uff09\u5728\u5ba2\u6237\u8868\u4e2d\uff0c\u4e00\u884c\u4ee3\u8868\u4e00\u4e2a\u5ba2\u6237\u7684\u4fe1\u606f<br>  - \u5217\uff1a\u4ee3\u8868\u6570\u636e\u7684\u5c5e\u6027\u3002\u4f8b\u5982\uff09\u5ba2\u6237\u59d3\u540d\u3001\u7535\u5b50\u90ae\u4ef6\u548c\u7535\u8bdd\u53f7\u7801<br><br><strong>\u5b57\u6bb5<\/strong>\u662f <strong>\u6bcf\u680f<\/strong>\u8fd9\u610f\u5473\u7740\u4e00\u4e2a\u5b57\u6bb5\u53ef\u4ee5\u7528\u4f5c <strong>\u5c5e\u6027<\/strong>\u6216 <strong>\u7279\u70b9<\/strong>\u5b57\u6bb5\u3002\u4f8b\u5982\uff0c\u5982\u679c\u8981\u521b\u5efa\u4e00\u4e2a\u5ba2\u6237\u8868\uff0c\u5c31\u9700\u8981\u8fd9\u6837\u7684\u5b57\u6bb5\uff1aID\u3001\u59d3\u540d\u3001\u7535\u5b50\u90ae\u4ef6\u3001\u7535\u8bdd\u53f7\u7801\u7b49\u3002 <\/p><\/div><\/span><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Django \u6a21\u578b\u57fa\u7840\uff1a\u521b\u5efa\u7b2c\u4e00\u4e2a\u6a21\u578b<\/h2>\n\n\n<style>.kb-image4687_6ce229-63 .kb-image-has-overlay:after{opacity:0.3;border-top-left-radius:5px;border-top-right-radius:5px;border-bottom-right-radius:5px;border-bottom-left-radius:5px;}.kb-image4687_6ce229-63 img.kb-img, .kb-image4687_6ce229-63 .kb-img img{border-top-left-radius:5px;border-top-right-radius:5px;border-bottom-right-radius:5px;border-bottom-left-radius:5px;box-shadow:0px 0px 14px 0px rgba(0, 0, 0, 0.2);}<\/style>\n<div class=\"wp-block-kadence-image kb-image4687_6ce229-63\"><figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"845\" height=\"398\" src=\"https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-3.jpg\" alt=\"Django models \uae30\ucd08 \ucc38\uace0 \uc774\ubbf8\uc9c0\" class=\"kb-img wp-image-4694\" srcset=\"https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-3.jpg 845w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-3-300x141.jpg 300w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-3-600x283.jpg 600w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-3-768x362.jpg 768w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-3-18x8.jpg 18w\" sizes=\"(max-width: 845px) 100vw, 845px\" \/><figcaption>(Django \u6a21\u578b\u57fa\u7840\u77e5\u8bc6\u53c2\u8003\u56fe\u7247 - \u7c7b\u548c\u8868\u683c )<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u5b9e\u9645\u521b\u5efa\u4e00\u4e2a Django \u6a21\u578b\u3002\u8bf7\u770b\u4e0b\u9762\u7684\u4ee3\u7801\uff0c\u5b83\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3a \"Book \"\u7684\u6a21\u578b\uff0c\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u5b58\u50a8\u548c\u7ba1\u7406\u56fe\u4e66\u4fe1\u606f\uff08\u7ae0\u8282\u6807\u9898\u3001\u4f5c\u8005\u3001\u51fa\u7248\u65e5\u671f\u3001\u56fe\u4e66\u4ef7\u683c\uff09\u7684\u7ed3\u6784<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u4ece django.db \u5bfc\u5165\u6a21\u578b\n\n\u7c7b Book(models.Model)\uff1a\n    title = models.CharField(max_length=200)\n    \u4f5c\u8005 = models.CharField(max_length=100)\n    \u51fa\u7248\u65e5\u671f = models.DateField()\n    \u4ef7\u683c = models.DecimalField(max_digits=6, decimal_places=2)\n\n    def __str__(self)\uff1a\n        return self.title<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u4ee3\u7801\u8bc4\u6ce8<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<ol class=\"wp-block-list\">\n<li><code>\u4ece django.db \u5bfc\u5165\u6a21\u578b<\/code>\u5bfc\u5165\uff0c\u4ee5\u4f7f\u7528 Django \u7684\u6a21\u578b\u529f\u80fd\u3002<\/li>\n\n\n\n<li><code>\u7c7b Book(models.Model)<\/code>\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3a \"\u56fe\u4e66 \"\u7684\u6a21\u578b\u7c7b\u3002 <code>\u6a21\u578b.\u6a21\u578b<\/code>\u81f3 <a href=\"https:\/\/secondlife.lol\/zh\/python-class-inheritance-examples\/\" data-type=\"post\" data-id=\"4624\">\u7ee7\u627f<\/a>\u8bf7\u56de\u7b54\u3002<\/li>\n\n\n\n<li><code>title = models.CharField(max_length=200)<\/code>\u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32\u5b57\u6bb5\uff0c\u7528\u4e8e\u5b58\u50a8\u4e66\u540d\u3002\u6700\u591a\u53ef\u5b58\u50a8 200 \u4e2a\u5b57\u7b26\u3002<\/li>\n\n\n\n<li><code>\u4f5c\u8005 = models.CharField(max_length=100)<\/code>\u4f5c\u8005\u59d3\u540d\uff1a\u7528\u4e8e\u5b58\u50a8\u4f5c\u8005\u59d3\u540d\u7684\u5b57\u6bb5\u3002\u6700\u591a\u53ef\u5b58\u50a8 100 \u4e2a\u5b57\u7b26\u3002<\/li>\n\n\n\n<li><code>publication_date = models.DateField()<\/code>\u65e5\u671f\u5b57\u6bb5\uff0c\u7528\u4e8e\u5b58\u50a8\u51fa\u7248\u65e5\u671f\u3002<\/li>\n\n\n\n<li><code>price = models.DecimalField(max_digits=6, decimal_places=2)<\/code>\u7528\u4e8e\u5b58\u50a8\u4ef7\u683c\u7684\u5c0f\u6570\u5b57\u6bb5\u3002\u6700\u591a\u53ef\u5b58\u50a8 6 \u4f4d\u6570\u5b57\u548c 2 \u4f4d\u5c0f\u6570\u3002<\/li>\n\n\n\n<li><code>def __str__(self)\uff1a<\/code>\u8be5\u65b9\u6cd5\u7528\u4e8e\u5c06\u6a21\u578b\u5b9e\u4f8b\u8868\u793a\u4e3a\u5b57\u7b26\u4e32\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u9009\u62e9\u8fd4\u56de\u4e66\u540d\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5c31\u662f\u4e00\u4e2a\u57fa\u672c\u7684 Django \u6a21\u578b\uff01\u5b83\u770b\u8d77\u6765\u5f88\u590d\u6742\uff0c\u4f46\u5f53\u4f60\u628a\u5b83\u7ec4\u5408\u5728\u4e00\u8d77\u65f6\uff0c\u5b83\u5e76\u4e0d\u96be\uff0c\u4e0d\u662f\u5417\uff1f <s>\u5982\u679c\u4f60\u4e0d\u660e\u767d\uff0c\u4f60\u4f1a\u600e\u4e48\u505a\uff1f \u4f60\u5c31\u4f1a\u8bf4\uff1a\"\u54e6\uff0c\u8fd9\u5c31\u662f\u5b83\u3002\"\u7136\u540e\u4f60\u5c31\u4f1a\u81ea\u7136\u800c\u7136\u5730\u4e86\u89e3\u5b83\u3002<\/s><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e86\u89e3 Django \u6a21\u578b\u548c\u6570\u636e\u5e93\u7ed3\u6784<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Django \u6a21\u578b\u53ef\u4ee5\u8f7b\u677e\u5b9a\u4e49\u6570\u636e\u5e93\u7ed3\u6784\u3002 \u4e0a\u8ff0\u56fe\u4e66\u6a21\u578b\u5b9e\u9645\u4e0a\u5728\u6570\u636e\u5e93\u4e2d\u521b\u5efa\u4e86\u4ee5\u4e0b\u8868\u683c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u521b\u5efa\u8868 \"books_book\" (\n    \"id\" integer NOT NULL PRIMARY KEY AUTOINCREMENT\u3001\n    \"\u6807\u9898\" varchar(200) NOT NULL\u3001\n    \"\u4f5c\u8005\" varchar(100) NOT NULL\u3001\n    \"\u51fa\u7248\u65e5\u671f \"\u65e5\u671f NOT NULL\u3001\n    \"\u4ef7\u683c\" decimal(6, 2) NOT NULL\n);<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u4ee3\u7801\u8bc4\u6ce8<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">SQL \u4ee3\u7801\u662f\u5c06\u6211\u4eec\u4e4b\u524d\u770b\u5230\u7684 Django \u6a21\u578b\u8f6c\u6362\u4e3a\u6570\u636e\u5e93\u8868\u3002 \u8fd9\u6bb5\u4ee3\u7801\u662f\u4e00\u6761 SQL \u547d\u4ee4\uff0c\u7528\u4e8e\u521b\u5efa\u540d\u4e3a \"books_book \"\u7684\u8868\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8868\u540d\uff1a\"books_book\n<ul class=\"wp-block-list\">\n<li>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cDjango \u901a\u8fc7\u7ec4\u5408\u5e94\u7528\u7a0b\u5e8f\u540d\u79f0\u548c\u6a21\u578b\u540d\u79f0\u6765\u521b\u5efa\u8868\u540d\u3002\u8fd9\u91cc\u6307\u7684\u662f \"\u4e66\u7c4d \"\u5e94\u7528\u7a0b\u5e8f\u7684 \"\u4e66\u7c4d \"\u6a21\u578b\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5b9a\u4e49\u5b57\u6bb5\n<ul class=\"wp-block-list\">\n<li>\"id\"\uff1a\u6574\u6570\u5b57\u6bb5\uff0c\u662f PRIMARY KEY\uff0c\u5177\u6709 AUTOINCREMENT \u5c5e\u6027\u3002<\/li>\n\n\n\n<li>\"\u6807\u9898\"\uff1a\u957f\u5ea6\u53ef\u53d8\u7684\u5b57\u7b26\u4e32\uff08varchar\uff09\u5b57\u6bb5\uff0c\u6700\u591a 200 \u4e2a\u5b57\u7b26\u3002<\/li>\n\n\n\n<li>\"\u4f5c\u8005\"\uff1a\u957f\u5ea6\u53ef\u53d8\u7684\u5b57\u7b26\u4e32\uff0c\u6700\u591a 100 \u4e2a\u5b57\u7b26\u3002<\/li>\n\n\n\n<li>\"\u51fa\u7248\u65e5\u671f\"\uff1a\u65e5\u671f (DATE) \u7c7b\u578b\u5b57\u6bb5\u3002<\/li>\n\n\n\n<li>\"\u4ef7\u683c\"\uff1a\u5c0f\u6570\u5b57\u6bb5\uff0c\u6700\u591a\u516d\u4f4d\u6570\uff0c\u5305\u62ec\u4e24\u4f4d\u5c0f\u6570\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5236\u7ea6\u56e0\u7d20\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6240\u6709\u5b57\u6bb5\u90fd\u6709\u7981\u6b62\u7a7a\u503c\u7684 NOT NULL \u7ea6\u675f\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u60a8\u6240\u89c1\uff0cDjango \u6a21\u578b\u4f1a\u81ea\u52a8\u5c06 Python \u4ee3\u7801\u8f6c\u6362\u4e3a SQL\uff0c\u8fd9\u5c31\u662f Django \u5bf9\u8c61\u5173\u7cfb\u6620\u5c04 (ORM) \u7684\u795e\u5947\u4e4b\u5904\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Django \u6a21\u578b\u57fa\u7840\uff1a\u8bbe\u7f6e\u5173\u7cfb<\/h2>\n\n\n<style>.kb-image4687_5c6253-7a .kb-image-has-overlay:after{opacity:0.3;}<\/style>\n<div class=\"wp-block-kadence-image kb-image4687_5c6253-7a\"><figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"600\" height=\"395\" src=\"https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-4-600x395.jpg\" alt=\"\" class=\"kb-img wp-image-4698\" srcset=\"https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-4-600x395.jpg 600w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-4-300x197.jpg 300w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-4-768x505.jpg 768w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-4-18x12.jpg 18w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-4.jpg 775w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><figcaption>(Django \u6a21\u578b\u57fa\u7840\u77e5\u8bc6\u53c2\u8003\u56fe\u7247 - \u8bbe\u7f6e\u5173\u7cfb )<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u6570\u636e\u5e93\u4e2d\u6700\u91cd\u8981\u7684\u6982\u5ff5\u4e4b\u4e00\u5c31\u662f\u5173\u7cfb\uff0c\u800c Django \u6a21\u578b\u53ef\u4ee5\u8f7b\u677e\u5730\u8868\u793a\u8fd9\u4e9b\u5173\u7cfb\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u7c7b Publisher(models.Model)\uff1a\n    \u59d3\u540d = models.CharField(max_length=200)\n    \u5730\u5740 = models.CharField(max_length=200)\n\n\u7c7b Book(models.Model)\uff1a\n    \u6807\u9898 = models.CharField(max_length=200)\n    \u4f5c\u8005 = models.ForeignKey('Author', on_delete=models.CASCADE)\n    \u51fa\u7248\u5546 = models.ForeignKey(\"Publisher\", on_delete=models.SET_NULL, null=True)\n    \u6d41\u6d3e = models.ManyToManyField('Genre')<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u4ee3\u7801\u8bc4\u6ce8<\/h3>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<ol class=\"wp-block-list\">\n<li><code>author = models.ForeignKey('Author', on_delete=models.CASCADE)<\/code>\u8fd9\u662f\u4e00\u5bf9\u591a\uff081:N\uff09\u7684\u5173\u7cfb\uff1a\u4e00\u4e2a\u4f5c\u8005\u53ef\u4ee5\u5199\u591a\u672c\u4e66\u3002 <code>on_delete=models.CASCADE<\/code>\u662f\u6307\u5220\u9664\u4e00\u4e2a\u4f5c\u8005\u65f6\uff0c\u8be5\u4f5c\u8005\u7684\u6240\u6709\u4e66\u7c4d\u4e5f\u4f1a\u88ab\u5220\u9664\u3002<\/li>\n\n\n\n<li><code>Publisher = models.ForeignKey(Publisher, on_delete=models.SET_NULL, null=True)<\/code>\u8fd9\u4e5f\u662f\u4e00\u5bf9\u591a\u7684\u5173\u7cfb\uff1a\u4e00\u4e2a\u51fa\u7248\u5546\u53ef\u4ee5\u51fa\u7248\u591a\u672c\u4e66\u3002 <code>on_delete=models.SET_NULL<\/code>\u8868\u793a\u5982\u679c\u5220\u9664\u4e86\u51fa\u7248\u5546\uff0c\u56fe\u4e66\u7684\u51fa\u7248\u5546\u5b57\u6bb5\u5c06\u8bbe\u4e3a NULL\uff08\u771f\uff09\u3002<\/li>\n\n\n\n<li><code>genres = models.ManyToManyField('Genre')<\/code>\u8fd9\u4ee3\u8868\u4e86\u591a\u5bf9\u591a\uff08N:N\uff09\u7684\u5173\u7cfb\uff1a\u4e00\u672c\u4e66\u53ef\u4ee5\u5c5e\u4e8e\u591a\u4e2a\u6d41\u6d3e\uff0c\u4e00\u4e2a\u6d41\u6d3e\u53ef\u4ee5\u5c5e\u4e8e\u591a\u672c\u4e66\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5c31\u662f Django \u6a21\u578b\u5982\u4f55\u8f7b\u677e\u8868\u793a\u590d\u6742\u6570\u636e\u5e93\u5173\u7cfb\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Django \u6a21\u578b\u57fa\u7840\u77e5\u8bc6\uff1a\u6570\u636e\u5e93\u8fc1\u79fb<\/h2>\n\n\n<style>.kb-image4687_8b7bea-fd .kb-image-has-overlay:after{opacity:0.3;border-top-left-radius:5px;border-top-right-radius:5px;border-bottom-right-radius:5px;border-bottom-left-radius:5px;}.kb-image4687_8b7bea-fd img.kb-img, .kb-image4687_8b7bea-fd .kb-img img{border-top-left-radius:5px;border-top-right-radius:5px;border-bottom-right-radius:5px;border-bottom-left-radius:5px;box-shadow:0px 0px 14px 0px rgba(0, 0, 0, 0.2);}<\/style>\n<div class=\"wp-block-kadence-image kb-image4687_8b7bea-fd\"><figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"809\" height=\"294\" src=\"https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-5.jpg\" alt=\"Django models \uae30\ucd08 \ucc38\uace0 \uc774\ubbf8\uc9c0 - \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ub9c8\uc774\uadf8\ub808\uc774\uc158\" class=\"kb-img wp-image-4699\" srcset=\"https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-5.jpg 809w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-5-300x109.jpg 300w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-5-600x218.jpg 600w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-5-768x279.jpg 768w, https:\/\/secondlife.lol\/wp-content\/uploads\/2025\/01\/image-14-5-18x7.jpg 18w\" sizes=\"(max-width: 809px) 100vw, 809px\" \/><figcaption>(Django \u6a21\u578b\u57fa\u7840\u53c2\u8003\u56fe\u7247 - \u6570\u636e\u5e93\u8fc1\u79fb )<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u521b\u5efa\u4e00\u4e2a\u6a21\u578b\u5e76\u4e0d\u610f\u5473\u7740\u5b83\u4f1a\u7acb\u5373\u53cd\u6620\u5230\u6570\u636e\u5e93\u4e2d\u3002 Django \u901a\u8fc7\u4e00\u4e2a\u79f0\u4e3a\u8fc1\u79fb\u7684\u8fc7\u7a0b\u5c06\u6a21\u578b\u7684\u66f4\u6539\u5e94\u7528\u5230\u6570\u636e\u5e93\u4e2d\u3002 <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>python manage.py makemigrations\npython manage.py \u8fc1\u79fb<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u9700\u8fd9\u4e24\u6761\u547d\u4ee4\uff0c\u5c31\u80fd\u5c06\u6a21\u578b\u521b\u5efa\u4e3a\u4e00\u4e2a\u771f\u6b63\u7684\u6570\u636e\u5e93\u8868\u3002\u5f88\u65b9\u4fbf\u5427\uff1f<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5c31\u662f Django \u6a21\u578b\u7684\u57fa\u7840\u77e5\u8bc6\u548c\u5bf9\u6570\u636e\u5e93\u7ed3\u6784\u7684\u7406\u89e3\u3002 \u4f60\u89c9\u5f97\u5982\u4f55\uff1f \u4e00\u5f00\u59cb\u53ef\u80fd\u4f1a\u89c9\u5f97\u6709\u70b9\u590d\u6742\uff0c\u4f46\u4e00\u65e6\u638c\u63e1\u4e86\u7a8d\u95e8\uff0c\u4f60\u5c31\u4f1a\u53d1\u73b0\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u548c\u65b9\u4fbf\u7684\u5de5\u5177\u3002 \u6709\u4e86 Django \u6a21\u578b\uff0c\u4f60\u5c31\u53ef\u4ee5\u8f7b\u677e\u5904\u7406\u590d\u6742\u7684\u6570\u636e\u5e93\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e2\u7136\u60a8\u5df2\u7ecf\u5b66\u4e60\u4e86 Django \u6a21\u578b\u7684\u57fa\u7840\u77e5\u8bc6\uff0c\u4e3a\u4ec0\u4e48\u4e0d\u5c1d\u8bd5\u521b\u5efa\u81ea\u5df1\u7684\u6a21\u578b\u5462\uff1f \u901a\u8fc7\u5b9e\u9645\u7f16\u5199\u548c\u8fd0\u884c\u4ee3\u7801\uff0c\u60a8\u4f1a\u5bf9\u5176\u6709\u66f4\u6df1\u5165\u7684\u4e86\u89e3\uff0c\u8ba9\u6211\u4eec\u5f00\u59cb\u5427\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u521d\u5b66\u8005\u672f\u8bed\u8868<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ORM\uff1aORM \u662f Object-Relational Mapping \u7684\u7f29\u5199\uff0c\u662f\u4e00\u79cd\u5c06\u5bf9\u8c61\u4e0e\u5173\u7cfb\u6570\u636e\u5e93\u8fde\u63a5\u8d77\u6765\u7684\u6280\u672f\u3002<\/li>\n\n\n\n<li>\u8fc1\u79fb\uff1aDjango 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