{"id":50031,"date":"2022-12-18T00:15:01","date_gmt":"2022-11-04T21:50:57","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8edjango-2-0%e7%9a%84%e5%8f%98%e6%9b%b4%e7%82%b9\/"},"modified":"2024-04-29T05:46:30","modified_gmt":"2024-04-28T21:46:30","slug":"%e5%85%b3%e4%ba%8edjango-2-0%e7%9a%84%e5%8f%98%e6%9b%b4%e7%82%b9","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8edjango-2-0%e7%9a%84%e5%8f%98%e6%9b%b4%e7%82%b9\/","title":{"rendered":"\u5173\u4e8eDjango 2.0\u7684\u53d8\u66f4\u70b9"},"content":{"rendered":"<p>\u672c\u6587\u662fDjango Advent Calendar 2017\u7684\u7b2c\u4e8c\u5929\u7684\u6587\u7ae0\u3002<\/p>\n<p>\u6211\u5011\u5c07\u4ecb\u7d39\u9577\u90549\u5e74\u7684Django 2.0\u7684\u91cd\u5927\u7248\u672c\u66f4\u65b0\u3002<\/p>\n<p>\u5728Django 2.0\u4e2d\uff0c\u505c\u6b62\u652f\u6301Python2\u7cfb\u5217\uff0c\u4ec5\u652f\u6301Python3.4\/3.5\/3.6\u3002<\/p>\n<h2>Django 2.0 \u8def\u7ebf\u56fe<\/h2>\n<div>\n<div class=\"post-table\">DateProcess2017\/09\/18Django 2.0 alpha; feature freeze.2017\/10\/16Django 2.0 beta; non-release blocking bug fix freeze.2017\/11\/15Django 2.0 RC 1; translation string freeze.2+ weeks after RC1Django 2.0 final (or RC 2, if needed).<\/div>\n<\/div>\n<p>\u76ee\u524d\u5df2\u53d1\u5e03\u4e86 Django 2.0rc1\u3002<\/p>\n<p>\u5982\u679c\u4e00\u5207\u987a\u5229\uff0c\u9884\u8ba1Django2.0\u7684\u6b63\u5f0f\u53d1\u5e03\u5c06\u572812\u6708\u4e2d\u65ec\u5ba3\u5e03\u3002<\/p>\n<h3>\u8865\u5145\u8bf4\u660e<\/h3>\n<p>Django 2.0\u4e8e12\/2\u53d1\u5e03\u6210\u529f\uff0c\u4ec5\u4ec5\u6570\u5c0f\u65f6\u540e\u5199\u5b8c\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff01<\/p>\n<h2>\u5168\u65b0\u529f\u80fd<\/h2>\n<h3>\u7c21\u55ae\u7684URL\u8def\u7531\u8a9e\u6cd5<\/h3>\n<p>\u9664\u4e86\u4f7f\u7528\u4f20\u7edf\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u65b9\u5f0f\uff08django.conf.urls.url()\uff09\uff0c\u73b0\u5728\u8fd8\u53ef\u4ee5\u4f7f\u7528\u65b0\u7684\u7b80\u5355\u65b9\u5f0f\uff08django.urls.path()\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">url<\/span><span class=\"p\">(<\/span><span class=\"sa\">r<\/span><span class=\"s\">'^articles\/(?P&lt;year&gt;[0-9]{4})\/$'<\/span><span class=\"p\">,<\/span> <span class=\"n\">views<\/span><span class=\"p\">.<\/span><span class=\"n\">year_archive<\/span><span class=\"p\">),<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">path<\/span><span class=\"p\">(<\/span><span class=\"s\">'articles\/&lt;int:year&gt;\/'<\/span><span class=\"p\">,<\/span> <span class=\"n\">views<\/span><span class=\"p\">.<\/span><span class=\"n\">year_archive<\/span><span class=\"p\">),<\/span>\r\n<\/code><\/pre>\n<h3>\u79fb\u52a8\u8bbe\u5907\u53cb\u597d\u7684contrib.admin<\/h3>\n<p>\u7ba1\u7406\u5458\u754c\u9762\u5df2\u5b9e\u73b0\u54cd\u5e94\u5f0f\u8bbe\u8ba1\u3002<\/p>\n<h4>Django 1.1\u53ef\u4ee5\u88ab\u89e3\u91ca\u4e3a\u201cDjango\u4e00\u70b9\u4e00\u7248\u201d\u3002<\/h4>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2017-12-02 09.22.16.png\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8e8c913a08637a6d5e0f\/18-0.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2017-12-02 09.22.16.png\" \/><\/div>\n<h4>Django 2.0 \u662f Django \u7684\u7b2c\u4e8c\u4e2a\u7248\u672c\u3002<\/h4>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2017-12-02 09.16.24.png\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d8e8c913a08637a6d5e0f\/20-0.png\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2017-12-02 09.16.24.png\" \/><\/div>\n<h3>\u7a97\u6237\u6807\u8bb0<\/h3>\n<ul class=\"post-ul\">OVER\u53e5\u3092\u8ffd\u52a0\u3067\u304d\u308bWindow\u8868\u8a18\u304c\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/ul>\n<h3>\u7cbe\u7d30\u7684\u529f\u80fd\u7d44\u5408<\/h3>\n<p>\u8fd0\u884c\u7684\u670d\u52a1\u5668\u652f\u6301HTTP 1.1\u7b49\u5176\u4ed6\u7ec6\u5fae\u7684\u65b0\u529f\u80fd\u3002\u5efa\u8bae\u60a8\u5feb\u901f\u6d4f\u89c8\u4e00\u4e0b\u6587\u6863\u3002<\/p>\n<h2>\u4e0d\u5177\u5907\u540e\u5411\u517c\u5bb9\u6027\u7684\u66f4\u6539<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">I\/O\u307e\u308f\u308a\u3092\u9664\u3044\u3066\u3001bytestrings\u306f\u4f7f\u7528\u4e0d\u53ef<\/ul>\n<\/li>\n<\/ul>\n<p>Python2\u7cfb\u306e\u30b5\u30dd\u30fc\u30c8\u5207\u308b\u305f\u3081<\/p>\n<p>DB\u30d0\u30c3\u30af\u30a8\u30f3\u30c9API\u306e\u5909\u66f4<\/p>\n<p>\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u306eDB\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u3067\u5fc5\u8981\u3068\u306a\u308b\u5909\u66f4\u70b9<br \/>\nhttps:\/\/docs.djangoproject.com\/en\/2.0\/releases\/2.0\/#database-backend-api<\/p>\n<p>Oracle 11.2\u3092\u30b5\u30dd\u30fc\u30c8\u5916<\/p>\n<p>Django1.11\u3067\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u304f<\/p>\n<p>MySQL\u306e\u5206\u96e2\u30ec\u30d9\u30eb\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u3092repeatable read\u304b\u3089read committed\u306b\u5909\u66f4<\/p>\n<p>AbstractUser.last_name\u306emax_length\u304c150\u6587\u5b57\u307e\u3067\u306b\u5897\u52a0<\/p>\n<p>AbstractUser\u3092\u4f7f\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u65b0\u305f\u306bmigration\u3092\u9069\u7528\u3059\u308b\u5fc5\u8981\u3042\u308a<\/p>\n<p>\u30b9\u30e9\u30a4\u30b9\u5f8c\u306e\u3001QuerySet.reverse()QuerySet.last()\u306f\u4f7f\u7528\u7981\u6b62<\/p>\n<pre class=\"post-pre\"><code>&gt;&gt;&gt; Model.objects.all()[:2].reverse()\r\nTraceback (most recent call last):\r\n...\r\nTypeError: Cannot reverse a query once a slice has been taken.\r\n<\/code><\/pre>\n<p>Form fields\u3078\u306e\u4f4d\u7f6e\u5f15\u6570\u3092\u7981\u6b62<\/p>\n<p>forms.IntegerField(25, 10)<\/p>\n<p>forms.IntegerField(max_value=25, min_value=10)<\/p>\n<p>call_command\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u6307\u5b9a\u65b9\u6cd5\u306b\u3001parser.add_argument \u52a0\u3048\u3066 stealth_options \u3068\u3044\u3046\u7c21\u5358\u306a\u8a2d\u5b9a\u304c\u53ef\u80fd\u306b<\/p>\n<p>\u4ee5\u4e0b\u306fflushcommand\u306e\u5b9f\u88c5\u3092\u4e00\u90e8\u629c\u7c8b\u3057\u305f\u3082\u306e<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">class<\/span> <span class=\"nc\">Command<\/span><span class=\"p\">(<\/span><span class=\"n\">BaseCommand<\/span><span class=\"p\">):<\/span>\r\n    <span class=\"n\">help<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span>\r\n        <span class=\"s\">'Removes ALL DATA from the database, including data added during '<\/span>\r\n        <span class=\"s\">'migrations. Does not achieve a \"fresh install\" state.'<\/span>\r\n    <span class=\"p\">)<\/span>\r\n    <span class=\"n\">stealth_options<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"s\">'reset_sequences'<\/span><span class=\"p\">,<\/span> <span class=\"s\">'allow_cascade'<\/span><span class=\"p\">,<\/span> <span class=\"s\">'inhibit_post_migrate'<\/span><span class=\"p\">)<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">add_arguments<\/span><span class=\"p\">(<\/span><span class=\"bp\">self<\/span><span class=\"p\">,<\/span> <span class=\"n\">parser<\/span><span class=\"p\">):<\/span>\r\n        <span class=\"n\">parser<\/span><span class=\"p\">.<\/span><span class=\"n\">add_argument<\/span><span class=\"p\">(<\/span>\r\n            <span class=\"s\">'--noinput'<\/span><span class=\"p\">,<\/span> <span class=\"s\">'--no-input'<\/span><span class=\"p\">,<\/span> <span class=\"n\">action<\/span><span class=\"o\">=<\/span><span class=\"s\">'store_false'<\/span><span class=\"p\">,<\/span> <span class=\"n\">dest<\/span><span class=\"o\">=<\/span><span class=\"s\">'interactive'<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"n\">help<\/span><span class=\"o\">=<\/span><span class=\"s\">'Tells Django to NOT prompt the user for input of any kind.'<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">)<\/span>\r\n        <span class=\"n\">parser<\/span><span class=\"p\">.<\/span><span class=\"n\">add_argument<\/span><span class=\"p\">(<\/span>\r\n            <span class=\"s\">'--database'<\/span><span class=\"p\">,<\/span> <span class=\"n\">action<\/span><span class=\"o\">=<\/span><span class=\"s\">'store'<\/span><span class=\"p\">,<\/span> <span class=\"n\">dest<\/span><span class=\"o\">=<\/span><span class=\"s\">'database'<\/span><span class=\"p\">,<\/span> <span class=\"n\">default<\/span><span class=\"o\">=<\/span><span class=\"n\">DEFAULT_DB_ALIAS<\/span><span class=\"p\">,<\/span>\r\n            <span class=\"n\">help<\/span><span class=\"o\">=<\/span><span class=\"s\">'Nominates a database to flush. Defaults to the \"default\" database.'<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">)<\/span>\r\n\r\n    <span class=\"k\">def<\/span> <span class=\"nf\">handle<\/span><span class=\"p\">(<\/span><span class=\"bp\">self<\/span><span class=\"p\">,<\/span> <span class=\"o\">**<\/span><span class=\"n\">options<\/span><span class=\"p\">):<\/span>\r\n        <span class=\"n\">database<\/span> <span class=\"o\">=<\/span> <span class=\"n\">options<\/span><span class=\"p\">[<\/span><span class=\"s\">'database'<\/span><span class=\"p\">]<\/span>\r\n        <span class=\"n\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"n\">connections<\/span><span class=\"p\">[<\/span><span class=\"n\">database<\/span><span class=\"p\">]<\/span>\r\n        <span class=\"n\">verbosity<\/span> <span class=\"o\">=<\/span> <span class=\"n\">options<\/span><span class=\"p\">[<\/span><span class=\"s\">'verbosity'<\/span><span class=\"p\">]<\/span>\r\n        <span class=\"n\">interactive<\/span> <span class=\"o\">=<\/span> <span class=\"n\">options<\/span><span class=\"p\">[<\/span><span class=\"s\">'interactive'<\/span><span class=\"p\">]<\/span>\r\n        <span class=\"c1\"># The following are stealth options used by Django's internals.\r\n<\/span>        <span class=\"n\">reset_sequences<\/span> <span class=\"o\">=<\/span> <span class=\"n\">options<\/span><span class=\"p\">.<\/span><span class=\"n\">get<\/span><span class=\"p\">(<\/span><span class=\"s\">'reset_sequences'<\/span><span class=\"p\">,<\/span> <span class=\"bp\">True<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"n\">allow_cascade<\/span> <span class=\"o\">=<\/span> <span class=\"n\">options<\/span><span class=\"p\">.<\/span><span class=\"n\">get<\/span><span class=\"p\">(<\/span><span class=\"s\">'allow_cascade'<\/span><span class=\"p\">,<\/span> <span class=\"bp\">False<\/span><span class=\"p\">)<\/span>\r\n        <span class=\"n\">inhibit_post_migrate<\/span> <span class=\"o\">=<\/span> <span class=\"n\">options<\/span><span class=\"p\">.<\/span><span class=\"n\">get<\/span><span class=\"p\">(<\/span><span class=\"s\">'inhibit_post_migrate'<\/span><span class=\"p\">,<\/span> <span class=\"bp\">False<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>models.Index\u3078\u306e\u4f4d\u7f6e\u5f15\u6570\u3092\u7981\u6b62<\/p>\n<p>models.Index([&#8216;headline&#8217;, &#8216;-pub_date&#8217;], &#8216;index_name&#8217;)<\/p>\n<p>models.Index(fields=[&#8216;headline&#8217;, &#8216;-pub_date&#8217;], name=&#8217;index_name&#8217;)<\/p>\n<p>\u5916\u90e8\u30ad\u30fc\u5236\u7d04\u3092SQLite\u3067\u3082\u3067\u304d\u308b\u3088\u3046\u306b<br \/>\n\u305d\u306e\u4ed6<\/p>\n<p>https:\/\/docs.djangoproject.com\/en\/2.0\/releases\/2.0\/#miscellaneous<\/p>\n<h2>\u4e0d\u5efa\u8bae\u4f7f\u7528\u7684\u529f\u80fd<\/h2>\n<p>Field.from_db_value()\u3068Expression.convert_value()\u306econtext\u5f15\u6570<\/p>\n<p>context\u5f15\u6570\u306f\u5e38\u306b\u7a7a\u306e\u8f9e\u66f8\u3068\u3057\u3066\u4f7f\u308f\u308c\u308b<br \/>\nDjango3.0\u3067\u524a\u9664\u4e88\u5b9a<\/p>\n<p>\u305d\u306e\u4ed6<\/p>\n<p>https:\/\/docs.djangoproject.com\/en\/2.0\/releases\/2.0\/#id1<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u6211\u5df2\u7ecf\u67e5\u770b\u4e86Django2.0\u7684\u66f4\u6539\u5185\u5bb9\uff0c\u4f5c\u4e3a\u8fc1\u79fb\u51c6\u5907\uff0c\u8ba9\u6211\u4eec\u4ece1.11\u73af\u5883\u4e2d\u89e3\u51b3RemovedInDjango20Warning\u3002\uff08\u53ef\u4ee5\u4f7f\u7528$ python -Wd manage.py\u547d\u4ee4\u68c0\u6d4b\u5230RemovedInDjango20Warning\u3002\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u662fDjango Advent Calendar 2017\u7684\u7b2c\u4e8c\u5929\u7684\u6587\u7ae0\u3002 \u6211\u5011\u5c07\u4ecb\u7d39\u9577\u90549\u5e74\u7684Django [&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-50031","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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