{"id":6044,"date":"2018-12-27T06:10:13","date_gmt":"2018-12-26T21:10:13","guid":{"rendered":"http:\/\/blog.jansnap.com\/?p=6044"},"modified":"2021-12-15T01:46:00","modified_gmt":"2021-12-14T16:46:00","slug":"django%e3%81%a7%e3%83%9a%e3%83%bc%e3%82%b8%e3%83%8d%e3%83%bc%e3%82%b7%e3%83%a7%e3%83%b3%e3%82%92%e4%bd%bf%e3%81%86djangocorepaginator","status":"publish","type":"post","link":"https:\/\/blog.jansnap.com\/?p=6044","title":{"rendered":"Django\u3067\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u3046(django.core.paginator)"},"content":{"rendered":"\n<h2><span class=\"ez-toc-section\" id=\"%E8%83%8C%E6%99%AF\"><\/span>\n\u80cc\u666f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<ul>\n<li>1\u753b\u9762\u306b\u8868\u793a\u3059\u308b\u4ef6\u6570\u304c\u591a\u304b\u3063\u305f\u306e\u3067\u3001\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3059\u308b\u3002<\/li>\n<li>\u6a19\u6e96\u306e<code>django.core.paginator<\/code>\u3092\u4f7f\u3046<\/li>\n<li>\u74b0\u5883\u306f\u3001Python 3.7.0 + Django 2.1.3<\/li>\n<\/ul>\n\n<h2><span class=\"ez-toc-section\" id=\"%E6%97%A2%E5%AD%98%E3%81%AE%E3%82%B3%E3%83%BC%E3%83%89%E3%81%AE%E5%A4%89%E6%9B%B4\"><\/span>\n\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u306e\u5909\u66f4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<h3><span class=\"ez-toc-section\" id=\"viewspy%E3%81%AE%E5%A4%89%E6%9B%B4\"><\/span>\n    views.py\u306e\u5909\u66f4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li><p><code>from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger<\/code> \u3092\u8ffd\u52a0<\/p><\/li>\n<li><p>\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u7528\u306e\u95a2\u6570\u3092\u8ffd\u52a0<\/p><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"python\" class=\"language-python\">from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger\n\n# \u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u7528\u306b\u3001Page\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3002\ndef paginate_query(request, queryset, count):\n  paginator = Paginator(queryset, count)\n  page = request.GET.get('page')\n  try:\n    page_obj = paginator.page(page)\n  except PageNotAnInteger:\n    page_obj = paginator.page(1)\n  except EmptyPage:\n    page_obj = paginatot.page(paginator.num_pages)\n  return page_obj<\/code><\/pre>\n\n\n\n<ul>\n<li>\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u3051\u53d6\u308b\u95a2\u6570\u306e\u5909\u66f4<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"python\" class=\"language-python\">def myapp1(request):\n  series = Series.objects.filter(deleted = False).order_by('-created_at')\n  page_obj = paginate_query(request, series, settings.PAGE_PER_ITEM)   # \u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\n  return render(request, 'app1\/index.html', {'page_obj': page_obj, 'site_name':settings.SITE_NAME})  # \u30e2\u30c7\u30eb\u304b\u3089\u53d6\u5f97\u3057\u305fobjects\u306e\u4ee3\u308f\u308a\u306b\u3001page_obj\u3092\u6e21\u3059<\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%86%E3%83%B3%E3%83%97%E3%83%AC%E3%83%BC%E3%83%88%E3%81%AE%E5%A4%89%E6%9B%B4\"><\/span>\n\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u306e\u5909\u66f4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n<ul>\n<li>\u30e2\u30c7\u30eb\u304b\u3089\u53d6\u5f97\u3057\u305fobjects\u306e\u4ee3\u308f\u308a\u306b\u3001page_obj\u3092\u4f7f\u3063\u3066\u8868\u793a\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">        {% for s in series %}\n                <p>{{ s.title }}<\/p>\n        {% endfor %}<\/code><\/pre>\n\n\n\n<p>\u3092\u3001series\u3092page_obj\u306b\u7f6e\u304d\u63db\u3048\u308b(for\u6587\u306e\u4e2d\u8eab\u306f\u305d\u306e\u307e\u307e\u3067\u3088\u3044)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">        {% for s in page_obj %}\n                <p>{{ s.title }}<\/p>\n        {% endfor %}<\/code><\/pre>\n\n\n\n<ul>\n<li>\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u90e8\u5206\u3092\u8ffd\u52a0(\u5225\u30d5\u30a1\u30a4\u30eb\u306b\u4f5c\u6210\u3057\u3066\u3001include\u3059\u308b\u3068\u3088\u3044)<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\"><div class=\"pagination\">\n    <span class=\"step-links\">\n        {% if page_obj.has_previous %}\n            <a href=\"?page=1\">\u00ab first<\/a>\n            <a href=\"?page={{ page_obj.previous_page_number }}\">previous<\/a>\n        {% endif %}\n\n        <span class=\"current\">\n            Page {{ page_obj.number }} of {{ page_obj.paginator.num_pages }}.\n        <\/span>\n\n        {% if page_obj.has_next %}\n            <a href=\"?page={{ page_obj.next_page_number }}\">next<\/a>\n            <a href=\"?page={{ page_obj.paginator.num_pages }}\">last \u00bb<\/a>\n        {% endif %}\n    <\/span>\n<\/div><\/code><\/pre>\n\n\n\n<h3><span class=\"ez-toc-section\" id=\"%E8%A8%AD%E5%AE%9A%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB%E3%81%AB%E3%80%811%E3%83%9A%E3%83%BC%E3%82%B8%E3%81%AB%E8%A1%A8%E7%A4%BA%E3%81%99%E3%82%8B%E4%BB%B6%E6%95%B0%E3%82%92%E6%8C%87%E5%AE%9A\"><\/span>\n\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u30011\u30da\u30fc\u30b8\u306b\u8868\u793a\u3059\u308b\u4ef6\u6570\u3092\u6307\u5b9a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"text\" class=\"language-text\">PAGE_PER_ITEM = 15<\/code><\/pre>\n\n\n\n<h2><span class=\"ez-toc-section\" id=\"Bootstrap4%E3%82%92%E4%BD%BF%E3%81%A3%E3%81%A6%E8%A6%8B%E6%98%A0%E3%81%88%E3%82%92%E3%82%88%E3%81%8F%E3%81%99%E3%82%8B\"><\/span>\nBootstrap4\u3092\u4f7f\u3063\u3066\u898b\u6620\u3048\u3092\u3088\u304f\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<ul>\n<li>for\u6587\u7528\u306e\u30da\u30fc\u30b8\u756a\u53f7\u306e\u30ea\u30b9\u30c8\u3092\u5f97\u308b\u305f\u3081\u306b\u3001<code>page_obj.paginator.page_range<\/code>\u3092\u4f7f\u3046<\/li>\n<li>\u4ed6\u306f\u3001<code>has_previous<\/code>, <code>previous_page_number<\/code>, <code>has_next<\/code>, <code>next_page_number<\/code>, <code>number<\/code>\u3067\u6307\u5b9a\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\"><div>\n    <nav aria-label=\"Page navigation example\">\n        <ul class=\"pagination\">\n            {% if page_obj.has_previous %}\n                <li><a class=\"page-link text-primary d-inline-block\" href=\"?page={{ page_obj.previous_page_number }}\">\u524d<\/a><\/li>\n            {% else %}\n                <li class=\"disabled\"><div class=\"page-link text-secondary d-inline-block disabled\" href=\"#\">\u524d<\/div><\/li>\n            {% endif %}\n\n            {% for link_page in page_obj.paginator.page_range %}\n                {% if link_page %}\n                    {% if link_page == page_obj.number %}\n                        <li class=\"disabled\"><div class=\"page-link text-secondary d-inline-block disabled\" href=\"#\">{{ link_page }}<\/div><\/li>\n                    {% else %}\n                        <li><a class=\"page-link text-primary d-inline-block\" href=\"?page={{ link_page }}\">{{ link_page }}<\/a><\/li>\n                    {% endif %}\n                {% else %}\n                    <li class=\"disabled\"><a class=\"page-link text-secondary d-inline-block text-muted\" href=\"#\">\u30fb\u30fb\u30fb<\/a><\/li>\n                {% endif %}\n            {% endfor %}\n\n            {% if page_obj.has_next %}\n                <li><a class=\"page-link text-primary d-inline-block\" href=\"?page={{ page_obj.next_page_number }}\">\u6b21<\/a><\/li>\n            {% else %}\n                <li class=\"disabled\"><div class=\"page-link text-secondary d-inline-block disabled\" href=\"#\">\u6b21<\/div><\/li>\n            {% endif %}\n        <\/ul>\n    <\/nav>\n<\/div><\/code><\/pre>\n\n\n\n<ul>\n<li>\u3053\u306e\u3088\u3046\u306a\u898b\u6620\u3048\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n\n<p><a href=\"https:\/\/camo.qiitausercontent.com\/975665b9a59e8ede59e4d03e55ab1270cac155d7\/68747470733a2f2f71696974612d696d6167652d73746f72652e73332e616d617a6f6e6177732e636f6d2f302f3134323537372f64636638646639342d333533322d346363652d303538342d3832383963306633383731362e706e67\" target=\"_blank\" rel=\"nofollow noopener\"><img decoding=\"async\" src=\"https:\/\/qiita-user-contents.imgix.net\/https%3A%2F%2Fqiita-image-store.s3.amazonaws.com%2F0%2F142577%2Fdcf8df94-3532-4cce-0584-8289c0f38716.png?ixlib=rb-4.0.0&auto=format&gif-q=60&q=75&s=0c761da5248986f2395b49821644a5b5\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2018-12-27 15.05.47.png\" data-canonical-src=\"https:\/\/qiita-image-store.s3.amazonaws.com\/0\/142577\/dcf8df94-3532-4cce-0584-8289c0f38716.png\" srcset=\"https:\/\/qiita-user-contents.imgix.net\/https%3A%2F%2Fqiita-image-store.s3.amazonaws.com%2F0%2F142577%2Fdcf8df94-3532-4cce-0584-8289c0f38716.png?ixlib=rb-4.0.0&auto=format&gif-q=60&q=75&w=1400&fit=max&s=cc48aec8e61c371c6c9d516d3b070ae2 1x\" loading=\"lazy\"><\/a><\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"%E5%8F%82%E8%80%83%E3%83%9A%E3%83%BC%E3%82%B8\"><\/span>\n\u53c2\u8003\u30da\u30fc\u30b8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n<ul>\n<li>\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306e<a href=\"https:\/\/docs.djangoproject.com\/ja\/2.1\/topics\/pagination\/#page-objects\" rel=\"nofollow noopener\" target=\"_blank\">\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3 \u2013 Page \u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/a>\n<\/li>\n<li><a href=\"https:\/\/narito.ninja\/detail\/89\/\" rel=\"nofollow noopener\" target=\"_blank\">Django\u3001\u30da\u30fc\u30b8\u30f3\u30b0\u51e6\u7406\u307e\u3068\u3081<\/a><\/li>\n<li><a href=\"https:\/\/qiita.com\/t-iguchi\/items\/5f276f44d9e3bea76e1e\" id=\"reference-8fba66a002d2470c8e52\">Django\u3067Pagination\u3092\u5b9f\u88c5\u3059\u308b<\/a><\/li>\n<li>Bootstrap4\u306e\u516c\u5f0f\u30da\u30fc\u30b8\u306e<a href=\"https:\/\/getbootstrap.com\/docs\/4.0\/components\/pagination\/\" rel=\"nofollow noopener\" target=\"_blank\">Pagination<\/a>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<ul>\n<li>1\u753b\u9762\u306b\u8868\u793a\u3059\u308b\u4ef6\u6570\u304c\u591a\u304b\u3063\u305f\u306e\u3067\u3001\u30da\u30fc\u30b8\u30cd\u30fc\u30b7\u30e7\u30f3\u3092\u8ffd\u52a0\u3059\u308b\u3002<\/li>\n<li>\u6a19\u6e96\u306e<code>django.core.paginator<\/code>\u3092\u4f7f\u3046<\/li>\n<li>\u74b0\u5883\u306f\u3001Python 3.7.0 + Django 2.1.3<\/li>\n<\/ul>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4106,4209,4070,4071],"tags":[4103,4208,4065,4066],"class_list":["post-6044","post","type-post","status-publish","format-standard","hentry","category-django","category-django21","category-python","category-python3","tag-django","tag-django21","tag-python","tag-python3"],"_links":{"self":[{"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/posts\/6044","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6044"}],"version-history":[{"count":0,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=\/wp\/v2\/posts\/6044\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6044"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6044"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jansnap.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6044"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}