{"id":53653,"date":"2019-12-07T00:00:00","date_gmt":"2019-12-06T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/vypusk-web-frejmvorka-django-3-0"},"modified":"2020-02-18T14:01:35","modified_gmt":"2020-02-18T11:01:35","slug":"vypusk-web-frejmvorka-django-3-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/lv\/blog\/news\/vypusk-web-frejmvorka-django-3-0","title":{"rendered":"Django 3.0 web ietvars izlai\u0161ana","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.djangoproject.com\/weblog\/2019\/dec\/02\/django-3-released\/\">Notika<\/a><\/noindex>  web ietvaru izlai\u0161ana <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">Django 3.0<\/a><\/noindex>, kas uzrakst\u012bts programm\u0113\u0161anas valod\u0101 Python un paredz\u0113ts t\u012bmek\u013ca lietojumprogrammu izstr\u0101dei. Django 3.0 zarus klasific\u0113 k\u0101 izlaides ar parastu atbalsta laiku, un tas <noindex><a rel=\"nofollow\" href=\"https:\/\/www.djangoproject.com\/download\/#supported-versions\">sa\u0146ems<\/a><\/noindex> atjaunin\u0101jumus l\u012bdz 2021. gada apr\u012blim. LTS zars 2.22 tiks atbalst\u012bts l\u012bdz 2022. gada apr\u012blim, bet zars 1.11 l\u012bdz 2020. gada apr\u012blim. Atbalsts zarai 2.1 ir p\u0101rtraukts. <\/p>\n<p>Galvenie <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">uzlabojumi<\/a><\/noindex>: <\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/howto\/deployment\/asgi\/\">Pied\u0101v\u0101ta<\/a><\/noindex> asoci\u0113ta darba atbalsts ar asynchronisko re\u017e\u012bmu, veicot to ASGI lietojumprogrammas form\u0101. Programmat\u016bras interfeiss <noindex><a rel=\"nofollow\" href=\"https:\/\/asgi.readthedocs.io\/\">ASGI<\/a><\/noindex> (Asynchronous Server Gateway Interface) izstr\u0101d\u0101ts k\u0101 WSGI aizst\u0101j\u0113js, m\u0113r\u0137\u0113jot uz serveru, ietvaru un lietojumprogrammu, kas atbalsta asynchronisko darbu, mijiedarb\u012bbu. Atbalsts palai\u0161anai, izmantojot WSGI, ir saglab\u0101ts, un ar asynchronisko re\u017e\u012bmu saist\u012btais kods tiek iek\u013cauts tikai palai\u017eot ASGI b\u0101zes vid\u0113.\n<p>Asynchroniskajam re\u017e\u012bmam ir ieviests atsevi\u0161\u0137s notikumu apstr\u0101des cikls (event loop), kur\u0101 nav at\u013cauts izsaukt kodu, kas atz\u012bm\u0113ts k\u0101 &#171;async unsafe&#187;. \u0160\u0101d\u0101 kod\u0101 ietilpst, piem\u0113ram, darb\u012bbas ar DB (ORM), kuras nevar izmantot asynchroniskaj\u0101 kontekst\u0101 (\u0161aj\u0101 gad\u012bjum\u0101 tiks izsniegta k\u013c\u016bda SynchronousOnlyOperation), un tas j\u0101izdara atsevi\u0161\u0137\u0101 sinhronaj\u0101 pavedien\u0101.<\/p>\n<li class=\"l\"> Tika pievienoti specializ\u0113ti uzskait\u0101mie tipi TextChoices, IntegerChoices un Choices, kurus var <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#field-choices-enum-types\">jau kaut kas ir j\u0101izmanto<\/a><\/noindex> izmanto, lai defin\u0113tu tekstus un veselos skait\u013cus mode\u013ca laukos, piem\u0113ram, vajadz\u012bbas gad\u012bjum\u0101 saglab\u0101jot lauku kopas ar las\u0101m\u0101m birk\u0101m, kas p\u0101rveidotas par noteikt\u0101m iez\u012bm\u0113m:\n<p>   class YearInSchool(models.TextChoices):<br \/>\n        FRESHMAN = &#8216;FR&#8217;, _(&#8216;Freshman&#8217;)<br \/>\n        SOPHOMORE = &#8216;SO&#8217;, _(&#8216;Sophomore&#8217;)<br \/>\n        JUNIOR = &#8216;JR&#8217;, _(&#8216;Junior&#8217;)<br \/>\n        SENIOR = &#8216;SR&#8217;, _(&#8216;Senior&#8217;)<br \/>\n        GRADUATE = &#8216;GR&#8217;, _(&#8216;Graduate&#8217;)<\/p>\n<li class=\"l\"> Tika pievienota iesp\u0113ja nor\u0101d\u012bt izteiksmes, kas izvada <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#django.db.models.BooleanField\">BooleanField<\/a><\/noindex>, tie\u0161i QuerySet filtr\u0113\u0161anas ietvaros, neizdarot to iepriek\u0161\u0113jo anot\u0101ciju, pirms to izmanto\u0161anas filtr\u0113\u0161anai.\n<li class=\"l\"> Ofici\u0101ls atbalsts ir nodro\u0161in\u0101ts DB MariaDB 10.1 un jaun\u0101kiem izlaidumiem.\n<li class=\"l\"> PostgreSQL ir ieviesta klase <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/contrib\/postgres\/constraints\/#django.contrib.postgres.constraints.ExclusionConstraint\">ExclusionConstraint<\/a><\/noindex> lai izmantotu ierobe\u017eojo\u0161os nosac\u012bjumus, pamatojoties uz izteiksmi <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/9.0\/ddl-constraints.html\">EXCLUDE<\/a><\/noindex>;\n<li class=\"l\"> Atbalsts Python 3.5 ir p\u0101rtraukts.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Avots: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51989\">opennet.lv<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 web-\u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a\u0430 Django 3.0, \u043d\u0430\u043f\u0438\u0441\u0430\u043d\u043d\u043e\u0433\u043e \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 Python \u0438 \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0433\u043e \u0434\u043b\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0432\u0435\u0431-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. \u0412\u0435\u0442\u043a\u0430 Django 3.0 \u043e\u0442\u043d\u0435\u0441\u0435\u043d\u0430 \u043a \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u0438 \u0432\u044b\u043f\u0443\u0441\u043a\u043e\u0432 \u0441 \u043e\u0431\u044b\u0447\u043d\u044b\u043c \u0441\u0440\u043e\u043a\u043e\u043c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0438 \u0438 \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u043b\u0443\u0447\u0430\u0442\u044c \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2021 \u0433\u043e\u0434\u0430. LTS-\u0432\u0435\u0442\u043a\u0430 2.22 \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c\u0441\u044f \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2022 \u0433\u043e\u0434\u0430, \u0430 \u0432\u0435\u0442\u043a\u0430 1.11 \u0434\u043e \u0430\u043f\u0440\u0435\u043b\u044f 2020 \u0433\u043e\u0434\u0430. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0432\u0435\u0442\u043a\u0438 2.1 \u043f\u0440\u0435\u043a\u0440\u0430\u0449\u0435\u043d\u0430. \u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0438\u044f: \u041f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-53653","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.5 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0421\u043e\u0441\u0442\u043e\u044f\u043b\u0441\u044f \u0440\u0435\u043b\u0438\u0437 web-\u0444\u0440\u0435\u0439\u043c\u0432\u043e\u0440\u043a\u0430\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/lv\/blog\/news\/vypusk-web-frejmvorka-django-3-0\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.5\" \/>\n\t\t<meta 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