{"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\/ja\/django-models-basics-database-structure-guide\/","title":{"rendered":"Django Models\u306e\u57fa\u790e\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092\u7c21\u5358\u306b\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u5b8c\u5168\u30ac\u30a4\u30c9"},"content":{"rendered":"<p class=\"wp-block-paragraph\">\u3053\u3093\u306b\u3061\u306f\u3001\u7686\u3055\u3093\uff01\u4eca\u65e5\u306fDjango models\u306e\u57fa\u790e\u7684\u306a\u5185\u5bb9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002 \u6700\u521d <a href=\"https:\/\/www.djangoproject.com\/\" target=\"_blank\" rel=\"noopener\">\u30b8\u30e3\u30f3\u30b4<\/a>\u3092\u898b\u305f\u6642\u3001models\u3068\u3044\u3046\u6982\u5ff5\u304c\u5c11\u3057\u96e3\u3057\u304f\u3066\u96e3\u3057\u304f\u611f\u3058\u307e\u305b\u3093\u3067\u3057\u305f\u304b\uff1f \u79c1\u3082\u305d\u3046\u3067\u3057\u305f\u3002\u3067\u3082\u3001\u5fc3\u914d\u3057\u306a\u3044\u3067\u304f\u3060\u3055\u3044\uff01\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001Django models\u306e\u57fa\u790e\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u5b8c\u74a7\u306b\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Django models\u306f\u3001\u8907\u96d1\u306aSQL\u30af\u30a8\u30ea\u3092\u5fc5\u8981\u3068\u305b\u305a\u3001Python\u30b3\u30fc\u30c9\u3060\u3051\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u9b54\u6cd5\u306e\u3088\u3046\u306a\u30c4\u30fc\u30eb\u3067\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001Django models\u306e\u57fa\u672c\u7684\u306a\u6982\u5ff5\u304b\u3089\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u4f8b\u307e\u3067\u3001Django models\u306b\u3064\u3044\u3066\u77e5\u3063\u3066\u304a\u304f\u3079\u304d\u3053\u3068\u3092\u3059\u3079\u3066\u8aac\u660e\u3057\u307e\u3059\u3002 \u3055\u3042\u3001\u59cb\u3081\u307e\u3057\u3087\u3046\u3002<\/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\">Django Models\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Django models\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092 <a href=\"https:\/\/secondlife.lol\/ja\/mastering-python-classes-for-beginners\/\" data-type=\"post\" data-id=\"3597\">Python\u30af\u30e9\u30b9<\/a>\u5404\u30e2\u30c7\u30eb\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u5fdc\u3057\u3001\u30e2\u30c7\u30eb\u306e\u5c5e\u6027\u306f\u30c6\u30fc\u30d6\u30eb\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u306a\u308a\u307e\u3059\u3002Django\u306f\u3053\u306e\u30e2\u30c7\u30eb\u306b\u3088\u3063\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u64cd\u4f5c\u3092\u62bd\u8c61\u5316\u3057\u3001\u958b\u767a\u8005\u304c\u3088\u308a\u7c21\u5358\u306b\u30c7\u30fc\u30bf\u3092\u6271\u3048\u308b\u3088\u3046\u306b\u3057\u307e\u3059\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\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\uff08\u30c6\u30fc\u30d6\u30eb\u3068\u30d5\u30a3\u30fc\u30eb\u30c9\uff09<\/h5><p class=\"kt-blocks-info-box-text\"><br><strong>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c6\u30fc\u30d6\u30eb<\/strong>\u306f\u30a8\u30af\u30bb\u30eb\u30d5\u30a1\u30a4\u30eb\u306e <strong>1\u679a<\/strong>\u3068\u4f3c\u3066\u3044\u307e\u3059\u3002\u30a8\u30af\u30bb\u30eb\u30b7\u30fc\u30c8\u306b\u306f\u8907\u6570\u306e\u884c(row)\u3068\u5217(column)\u304c\u3042\u308a\u307e\u3059\u3088\u306d\uff1f \u30c6\u30fc\u30d6\u30eb\u3082\u540c\u69d8\u306b\u30c7\u30fc\u30bf\u304c\u884c(\u30ec\u30b3\u30fc\u30c9)\u3068\u5217(\u30d5\u30a3\u30fc\u30eb\u30c9)\u3067\u69cb\u6210\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br>  - \u884c(Row)\uff1a\u4e00\u3064\u306e\u30c7\u30fc\u30bf\u3092\u8868\u3057\u307e\u3059\u3002\u4f8b)\u9867\u5ba2\u30c6\u30fc\u30d6\u30eb\u30671\u884c\u306f1\u3064\u306e\u9867\u5ba2\u306e\u60c5\u5831<br>  - \u5217(Column)\uff1a\u30c7\u30fc\u30bf\u306e\u5c5e\u6027\u3092\u8868\u3057\u307e\u3059\u3002\u4f8b)\u9867\u5ba2\u306e\u540d\u524d\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001\u96fb\u8a71\u756a\u53f7<br><br><strong>\u30d5\u30a3\u30fc\u30eb\u30c9<\/strong>\u306f\u3001\u30c6\u30fc\u30d6\u30eb\u5185\u306b\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3059\u308b <strong>\u5404\u5217<\/strong>\u3064\u307e\u308a\u3001\u4e00\u3064\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u306e <strong>\u30d7\u30ed\u30d1\u30c6\u30a3<\/strong>\u30a4\u30ca <strong>\u7279\u5fb4<\/strong>\u3092\u4fdd\u5b58\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u9867\u5ba2\u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u308b\u5834\u5408\u3001ID\u3001\u540d\u524d\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001\u96fb\u8a71\u756a\u53f7\u306a\u3069\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u5fc5\u8981\u3067\u3057\u3087\u3046\u3002 <\/p><\/div><\/span><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Django Models\u306e\u57fa\u790e\uff1a\u6700\u521d\u306e\u30e2\u30c7\u30eb\u306e\u4f5c\u6210<\/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 models \u57fa\u790e\u53c2\u8003\u753b\u50cf - \u30af\u30e9\u30b9\u3068\u30c6\u30fc\u30d6\u30eb )<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3042\u3001\u5b9f\u969b\u306bDjango models\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u4e0b\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002 \u3053\u306e\u30b3\u30fc\u30c9\u306f'Book'\u3068\u3044\u3046\u30e2\u30c7\u30eb\u3092\u751f\u6210\u3057\u3066\u66f8\u7c4d\u60c5\u5831(\u30c1\u30a7\u30c3\u30af\u30bf\u30a4\u30c8\u30eb\u3001\u8457\u8005\u3001\u51fa\u7248\u65e5\u3001\u66f8\u7c4d\u4fa1\u683c)\u3092\u4fdd\u5b58\u3057\u3066\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u69cb\u9020\u3092\u4f5c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from django.db import models\n\nclass Book(models.Model)\uff1a\n    title = models.CharField(max_length=200)\n    author = models.CharField(max_length=100)\n    publication_date = models.DateField()\n    price = 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\">\u30b3\u30fc\u30c9\u89e3\u8aac<\/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>from django.db import models<\/code>: Django\u306e\u30e2\u30c7\u30eb\u6a5f\u80fd\u3092\u4f7f\u3046\u305f\u3081import\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li><code>\u30af\u30e9\u30b9 Book(models.Model)<\/code>: 'Book'\u3068\u3044\u3046\u540d\u524d\u306e\u30e2\u30c7\u30eb\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002 <code>\u30e2\u30c7\u30eb.Model<\/code>\u3092 <a href=\"https:\/\/secondlife.lol\/ja\/python-class-inheritance-examples\/\" data-type=\"post\" data-id=\"4624\">\u7d99\u627f<\/a>\u53d7\u3051\u53d6\u308a\u307e\u3059\u3002<\/li>\n\n\n\n<li><code>title = models.CharField(max_length=200)<\/code>: \u672c\u306e\u30bf\u30a4\u30c8\u30eb\u3092\u4fdd\u5b58\u3059\u308b\u6587\u5b57\u5217\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u6700\u5927200\u6587\u5b57\u307e\u3067\u4fdd\u5b58\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li><code>author = models.CharField(max_length=100)<\/code>:\u8457\u8005\u540d\u3092\u4fdd\u5b58\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002\u6700\u5927100\u6587\u5b57\u307e\u3067\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li><code>publication_date = models.DateField()<\/code>: \u516c\u958b\u65e5\u3092\u4fdd\u5b58\u3059\u308b\u65e5\u4ed8\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002<\/li>\n\n\n\n<li><code>price = models.DecimalField(max_digits=6, decimal_places=2)<\/code>:\u4fa1\u683c\u3092\u4fdd\u5b58\u3059\u308b\u5c0f\u6570\u70b9\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002\u6700\u59276\u6841\u3001\u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u307e\u3067\u4fdd\u5b58\u53ef\u80fd\u3067\u3059\u3002<\/li>\n\n\n\n<li><code>def __str__(self)\uff1a<\/code>: \u3053\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u30e2\u30c7\u30eb\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u6587\u5b57\u5217\u3067\u8868\u73fe\u3059\u308b\u6642\u4f7f\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u672c\u306e\u30bf\u30a4\u30c8\u30eb\u3092\u8fd4\u3059\u3088\u3046\u306b\u3057\u307e\u3057\u305f\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3067\u3001\u57fa\u672c\u7684\u306aDjango models\u304c\u5b8c\u6210\u3057\u307e\u3059\uff01\u8907\u96d1\u306b\u898b\u3048\u307e\u3059\u304c\u3001\u4e00\u3064\u4e00\u3064\u3092\u5206\u89e3\u3057\u3066\u307f\u308b\u3068\u305d\u3093\u306a\u306b\u96e3\u3057\u304f\u306a\u3044\u3067\u3059\u3088\u306d\uff1f <s>\u7406\u89e3\u3067\u304d\u306a\u3044\u3068\u304d\u306f\u3069\u3046\u3059\u308b\uff1f \u3068\u308a\u3042\u3048\u305a\u3001\u3053\u3046\u3044\u3046\u3082\u306e\u304c\u3042\u308b\u3093\u3060\u306a\u3068\u601d\u3044\u306a\u304c\u3089\u9032\u3093\u3067\u3044\u304f\u3068\u3001\u81ea\u7136\u3068\u308f\u304b\u308b\u306e\u304c\u3053\u306e\u5e95\u3067\u3059\u3002<\/s><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Django Models\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092\u7406\u89e3\u3059\u308b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Django models\u3092\u4f7f\u3046\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u69cb\u9020\u3092\u7c21\u5358\u306b\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u4e0a\u306eBook\u30e2\u30c7\u30eb\u306f\u5b9f\u969b\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u6b21\u306e\u3088\u3046\u306a\u30c6\u30fc\u30d6\u30eb\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE \"books_book\"(\n    \"id\" integer NOT NULL PRIMARY KEY AUTOINCREMENT\u3001\n    \"title\" varchar(200) NOT NULL\u3001\n    \"author\" varchar(100) NOT NULL\u3001\n    \"publication_date\" date NOT NULL\u3001\n    \"price\" 10\u9032\u6570(6, 2) NOT NULL\n)\u3067\u3059\uff1b<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b3\u30fc\u30c9\u89e3\u8aac<\/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\u30b3\u30fc\u30c9\u306f\u5148\u307b\u3069\u898b\u305fDjango\u30e2\u30c7\u30eb\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c6\u30fc\u30d6\u30eb\u306b\u5909\u63db\u3057\u305f\u3082\u306e\u3067\u3059\u3002 \u3053\u306e\u30b3\u30fc\u30c9\u306f'books_book'\u3068\u3044\u3046\u30c6\u30fc\u30d6\u30eb\u3092\u751f\u6210\u3059\u308bSQL\u30b3\u30de\u30f3\u30c9\u3067\u3059\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u30c6\u30fc\u30d6\u30eb\u540d: \"books_book\"\n<ul class=\"wp-block-list\">\n<li>Django\u306f\u57fa\u672c\u7684\u306b\u30a2\u30d7\u30ea\u540d\u3068\u30e2\u30c7\u30eb\u540d\u3092\u7d44\u307f\u5408\u308f\u305b\u3066\u30c6\u30fc\u30d6\u30eb\u540d\u3092\u4f5c\u308a\u307e\u3059\u3002\u3053\u3053\u3067\u306f'books'\u30a2\u30d7\u30ea\u306e'Book'\u30e2\u30c7\u30eb\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u30d5\u30a3\u30fc\u30eb\u30c9\u5b9a\u7fa9\n<ul class=\"wp-block-list\">\n<li>\"id\"\uff1a\u6574\u6570\u578b(integer)\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3001\u4e3b\u30ad\u30fc(PRIMARY KEY)\u3067\u3042\u308a\u3001\u81ea\u52d5\u5897\u52a0(AUTOINCREMENT)\u5c5e\u6027\u3092\u6301\u3061\u307e\u3059\u3002<\/li>\n\n\n\n<li>\"title\"\uff1a\u6700\u5927200\u6587\u5b57\u306e\u53ef\u5909\u9577\u6587\u5b57\u5217(varchar)\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002<\/li>\n\n\n\n<li>\"author\"\uff1a\u6700\u5927100\u6587\u5b57\u306e\u53ef\u5909\u9577\u6587\u5b57\u5217\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002<\/li>\n\n\n\n<li>\"publication_date\"\uff1a\u65e5\u4ed8(date)\u30bf\u30a4\u30d7\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002<\/li>\n\n\n\n<li>\"price\"\uff1a\u5c0f\u6570\u70b9\u4ee5\u4e0b2\u6841\u3092\u542b\u3080\u6700\u59276\u6841\u306e10\u9032\u6570(decimal)\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5236\u7d04\u6761\u4ef6\uff1a\n<ul class=\"wp-block-list\">\n<li>\u3059\u3079\u3066\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306bNOT NULL\u5236\u7d04\u304c\u3042\u308a\u3001NULL\u5024\u3092\u8a31\u53ef\u3057\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u3054\u89a7\u306e\u901a\u308a\u3001Django models\u306fPython\u30b3\u30fc\u30c9\u3092SQL\u306b\u81ea\u52d5\u5909\u63db\u3057\u3066\u304f\u308c\u307e\u3059\u3002 \u3053\u308c\u304cDjango ORM(Object-Relational Mapping)\u306e\u9b54\u6cd5\u3067\u3059\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Django Models\u306e\u57fa\u790e: \u95a2\u4fc2\u3092\u8a2d\u5b9a\u3059\u308b<\/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 models \u57fa\u790e\u53c2\u8003\u753b\u50cf - \u95a2\u4fc2\u3092\u8a2d\u5b9a\u3059\u308b )<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3067\u6700\u3082\u91cd\u8981\u306a\u6982\u5ff5\u306e\u4e00\u3064\u304c\u300c\u95a2\u4fc2\u300d\u3067\u3059\u3002 Django models\u3067\u3082\u3053\u306e\u3088\u3046\u306a\u95a2\u4fc2\u3092\u7c21\u5358\u306b\u8868\u73fe\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class Publisher(models.Model)\uff1a\n    name = models.CharField(max_length=200)\n    address = models.CharField(max_length=200)\n\nclass Book(models.Model)\uff1a\n    title = models.CharField(max_length=200)\n    author = models.ForeignKey('Author', on_delete=models.CASCADE)\n    publisher = models.ForeignKey(Publisher, on_delete=models.SET_NULL, null=True)\n    genres = models.ManyToManyField('Genre')<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u30b3\u30fc\u30c9\u89e3\u8aac<\/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>\u3053\u308c\u306f1\u5bfe\u591a(1:N)\u306e\u95a2\u4fc2\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002 \u4e00\u4eba\u306e\u8457\u8005\u304c\u8907\u6570\u306e\u672c\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <code>on_delete=models.CASCADE<\/code>\u306f\u3001\u8457\u8005\u304c\u524a\u9664\u3055\u308c\u308b\u3068\u3001\u305d\u306e\u8457\u8005\u306e\u3059\u3079\u3066\u306e\u672c\u3082\u524a\u9664\u3055\u308c\u308b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/li>\n\n\n\n<li><code>publisher = models.ForeignKey(Publisher, on_delete=models.SET_NULL, null=True)<\/code>\u3053\u308c\u30821\u5bfe\u591a\u306e\u95a2\u4fc2\u3067\u3059\u306d\u3002 1\u3064\u306e\u51fa\u7248\u793e\u304c\u8907\u6570\u306e\u672c\u3092\u51fa\u7248\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <code>on_delete=models.SET_NULL<\/code>\u306f\u51fa\u7248\u793e\u304c\u524a\u9664\u3055\u308c\u308b\u3068\u3001\u305d\u306e\u672c\u306e\u51fa\u7248\u793e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092NULL\u306b\u8a2d\u5b9a\u3059\u308b(True)\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<\/li>\n\n\n\n<li><code>genres = models.ManyToManyField('Genre')<\/code>\u3053\u308c\u306f\u591a\u5bfe\u591a(N:N)\u306e\u95a2\u4fc2\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002 1\u518a\u306e\u672c\u304c\u8907\u6570\u306e\u30b8\u30e3\u30f3\u30eb\u306b\u5c5e\u3059\u308b\u3053\u3068\u3082\u3042\u308c\u3070\u30011\u3064\u306e\u30b8\u30e3\u30f3\u30eb\u306b\u8907\u6570\u306e\u672c\u304c\u5c5e\u3059\u308b\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ol>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3088\u3046\u306bDjango models\u3092\u4f7f\u3046\u3068\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u95a2\u4fc2\u3082\u7c21\u5358\u306b\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Django Models\u306e\u57fa\u790e\uff1a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u79fb\u884c<\/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 models\u57fa\u790e\u53c2\u8003\u753b\u50cf - \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u79fb\u884c )<\/figcaption><\/figure><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30e2\u30c7\u30eb\u3092\u4f5c\u3063\u305f\u304b\u3089\u3068\u3044\u3063\u3066\u3001\u3059\u3050\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u53cd\u6620\u3055\u308c\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002 Django\u3067\u306f\u300c\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u300d\u3068\u3044\u3046\u30d7\u30ed\u30bb\u30b9\u3067\u30e2\u30c7\u30eb\u306e\u5909\u66f4\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u9069\u7528\u3057\u307e\u3059\u3002 <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>python manage.py makemigrations\npython manage.py migrate<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e2\u3064\u306e\u30b3\u30de\u30f3\u30c9\u3060\u3051\u3067\u3042\u306a\u305f\u306e\u30e2\u30c7\u30eb\u304c\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30c6\u30fc\u30d6\u30eb\u306b\u306a\u308a\u307e\u3059\u3002\u672c\u5f53\u306b\u4fbf\u5229\u3067\u3059\u3088\u306d\uff1f<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4ed5\u4e0a\u3052<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u3055\u3066\u3001\u3053\u3053\u307e\u3067Django models\u306e\u57fa\u790e\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u69cb\u9020\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u3002 \u3069\u3046\u3067\u3057\u305f\u304b\uff1f \u6700\u521d\u306f\u5c11\u3057\u8907\u96d1\u306b\u898b\u3048\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u4e00\u3064\u4e00\u3064\u7406\u89e3\u3057\u3066\u3044\u304f\u3068\u3001\u672c\u5f53\u306b\u30d1\u30ef\u30d5\u30eb\u3067\u4fbf\u5229\u306a\u30c4\u30fc\u30eb\u3060\u3068\u611f\u3058\u308b\u3053\u3068\u3067\u3057\u3087\u3046\u3002 Django models\u3092\u3046\u307e\u304f\u6d3b\u7528\u3059\u308c\u3070\u3001\u8907\u96d1\u306a\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u4f5c\u696d\u3082\u672c\u5f53\u306b\u7c21\u5358\u306b\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3088\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7686\u3055\u3093\u3082\u3001Django models\u306e\u57fa\u790e\u3092\u5b66\u3093\u3060\u306e\u3067\u3001\u81ea\u5206\u3067\u30e2\u30c7\u30eb\u3092\u4f5c\u3063\u3066\u307f\u3066\u306f\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\uff1f \u5b9f\u969b\u306b\u30b3\u30fc\u30c9\u3092\u66f8\u3044\u3066\u5b9f\u884c\u3057\u3066\u307f\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u6df1\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u601d\u3044\u307e\u3059\u3002 \u307f\u3093\u306a\u3001\u304c\u3093\u3070\u308a\u307e\u3057\u3087\u3046<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u521d\u5fc3\u8005\u5411\u3051\u7528\u8a9e\u89e3\u8aac<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ORM: Object-Relational Mapping\u306e\u7565\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u30ea\u30ec\u30fc\u30b7\u30e7\u30ca\u30eb\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u3064\u306a\u3050\u6280\u8853\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\uff1a\u30e2\u30c7\u30eb\u306e\u5909\u66f4\u3092\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b9\u30ad\u30fc\u30de\u306b\u53cd\u6620\u3059\u308bDjango\u306e\u65b9\u6cd5\u3067\u3059\u3002<\/li>\n\n\n\n<li>\u30d5\u30a3\u30fc\u30eb\u30c9\uff1a\u30e2\u30c7\u30eb\u306e\u5c5e\u6027\u3092\u8868\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u30ab\u30e9\u30e0\u306b\u76f8\u5f53\u3057\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u5916\u90e8\u30ad\u30fc(Foreign Key)\uff1a\u4ed6\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u57fa\u672c\u30ad\u30fc\u3092\u53c2\u7167\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u3059\u3002 1\u5bfe\u591a\u306e\u95a2\u4fc2\u3092\u8868\u73fe\u3059\u308b\u3068\u304d\u306b\u4f7f\u3044\u307e\u3059\u3002<\/li>\n\n\n\n<li>\u591a\u5bfe\u591a\u306e\u95a2\u4fc2(Many-to-Many)\uff1a\u4e21\u30e2\u30c7\u30eb\u304c\u4e92\u3044\u306b\u8907\u6570\u306e\u95a2\u4fc2\u3092\u6301\u3064\u3053\u3068\u304c\u3067\u304d\u308b\u5834\u5408\u3092\u6307\u3057\u307e\u3059\u3002<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>\uc548\ub155\ud558\uc138\uc694, \uc5ec\ub7ec\ubd84! \uc624\ub298\uc740 Django models \uae30\ucd08\uc801 \ub0b4\uc6a9\uc5d0 \ub300\ud574 \uc54c\uc544\ubcfc 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