{"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\/cs\/blog\/news\/vypusk-web-frejmvorka-django-3-0","title":{"rendered":"Vyd\u00e1n\u00ed webov\u00e9ho frameworku Django 3.0","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\/\">Prob\u011bhlo<\/a><\/noindex>  vyd\u00e1n\u00ed webov\u00e9ho r\u00e1mce <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">Django 3.0<\/a><\/noindex>, napsan\u00e9ho v jazyce Python a ur\u010den\u00e9ho pro v\u00fdvoj webov\u00fdch aplikac\u00ed. V\u011btev Django 3.0 pat\u0159\u00ed do kategorie vyd\u00e1n\u00ed se standardn\u00ed podporou a bude <noindex><a rel=\"nofollow\" href=\"https:\/\/www.djangoproject.com\/download\/#supported-versions\">z\u00edskat<\/a><\/noindex> aktualizov\u00e1na do dubna 2021. LTS v\u011btev 2.22 bude podporov\u00e1na do dubna 2022, zat\u00edmco v\u011btev 1.11 do dubna 2020. Podpora v\u011btve 2.1 byla ukon\u010dena. <\/p>\n<p>Kl\u00ed\u010dov\u00e9 <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">vylep\u0161en\u00ed<\/a><\/noindex>: <\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/howto\/deployment\/asgi\/\">Byla poskytnuta<\/a><\/noindex> podpora pr\u00e1ce v asynchronn\u00edm re\u017eimu s v\u00fdkonem ve form\u011b ASGI aplikace. Programov\u00e9 rozhran\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/asgi.readthedocs.io\/\">ASGI<\/a><\/noindex> (Asynchronous Server Gateway Interface) bylo vyvinuto jako n\u00e1hrada za WSGI, zam\u011b\u0159uj\u00edc\u00ed se na zaji\u0161t\u011bn\u00ed interakce server\u016f, r\u00e1mc\u016f a aplikac\u00ed, kter\u00e9 podporuj\u00ed asynchronn\u00ed re\u017eim. Podpora spu\u0161t\u011bn\u00ed pomoc\u00ed WSGI z\u016fst\u00e1v\u00e1, a k\u00f3d souvisej\u00edc\u00ed s asynchronn\u00edm re\u017eimem se zahrnuje pouze p\u0159i spu\u0161t\u011bn\u00ed v prost\u0159ed\u00edch na b\u00e1zi ASGI.\n<p>Pro asynchronn\u00ed re\u017eim byl implementov\u00e1n samostatn\u00fd cyklus zpracov\u00e1n\u00ed ud\u00e1lost\u00ed (event loop), v n\u011bm\u017e nen\u00ed povoleno vol\u00e1n\u00ed k\u00f3du ozna\u010den\u00e9ho jako &#171;async unsafe&#187;. K takov\u00e9mu k\u00f3du pat\u0159\u00ed nap\u0159\u00edklad operace s datab\u00e1z\u00ed (ORM), kter\u00e9 nelze pou\u017e\u00edvat v asynchronn\u00edm kontextu (v tomto p\u0159\u00edpad\u011b se zobraz\u00ed chyba SynchronousOnlyOperation) a m\u011bly by b\u00fdt p\u0159esunuty do samostatn\u00e9ho synchronn\u00edho vl\u00e1kna.<\/p>\n<li class=\"l\"> Byly p\u0159id\u00e1ny specializovan\u00e9 v\u00fd\u010dtov\u00e9 typy TextChoices, IntegerChoices a Choices, kter\u00e9 lze <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#field-choices-enum-types\">pou\u017e\u00edt<\/a><\/noindex> pou\u017e\u00edt pro definici textov\u00fdch a celistv\u00fdch pol\u00ed v modelu, nap\u0159\u00edklad kdy\u017e je pot\u0159eba ukl\u00e1dat v pol\u00edch sady \u010diteln\u00fdch \u0161t\u00edtk\u016f, kter\u00e9 se p\u0159ev\u00e1d\u011bj\u00ed na ur\u010dit\u00e9 vlastnosti:\n<p>   class YearInSchool(models.TextChoices):<br \/>\n        FRESHMAN = &#8216;FR&#8217;, _(&#8216;Prv\u00e1k&#8217;)<br \/>\n        SOPHOMORE = &#8216;SO&#8217;, _(&#8216;Druh\u00e1k&#8217;)<br \/>\n        JUNIOR = &#8216;JR&#8217;, _(&#8216;T\u0159et\u00ed\u00e1k&#8217;)<br \/>\n        SENIOR = &#8216;SR&#8217;, _(&#8216;\u010ctvr\u0165\u00e1k&#8217;)<br \/>\n        GRADUATE = &#8216;GR&#8217;, _(&#8216;Absolvent&#8217;)<\/p>\n<li class=\"l\"> Byla p\u0159id\u00e1na mo\u017enost uv\u00e1d\u011bt v\u00fdrazy, kter\u00e9 vracej\u00ed <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#django.db.models.BooleanField\">BooleanField<\/a><\/noindex>, p\u0159\u00edmo ve filtrech QuerySet bez jejich p\u0159edchoz\u00edho anotov\u00e1n\u00ed p\u0159ed pou\u017eit\u00edm na filtrov\u00e1n\u00ed anotac\u00ed.\n<li class=\"l\"> Byla zaji\u0161t\u011bna ofici\u00e1ln\u00ed podpora DB MariaDB 10.1 a nov\u011bj\u0161\u00edch verz\u00ed.\n<li class=\"l\"> Pro PostgreSQL byl implementov\u00e1n t\u0159\u00edda <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/contrib\/postgres\/constraints\/#django.contrib.postgres.constraints.ExclusionConstraint\">ExclusionConstraint<\/a><\/noindex> pro pou\u017eit\u00ed omezen\u00ed na z\u00e1klad\u011b v\u00fdraz\u016f <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/9.0\/ddl-constraints.html\">EXCLUDE<\/a><\/noindex>;\n<li class=\"l\"> Podpora Pythonu 3.5 byla ukon\u010dena.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Zdroj: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51989\">opennet.ru<\/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 5.0.3 - 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\/cs\/blog\/news\/vypusk-web-frejmvorka-django-3-0\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta 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