{"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\/hu\/blog\/news\/vypusk-web-frejmvorka-django-3-0","title":{"rendered":"A Django 3.0 web-keretrendszer kiad\u00e1sa","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\/\">Megval\u00f3sult<\/a><\/noindex>  a web keretrendszer kiad\u00e1sa <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">Django 3.0<\/a><\/noindex>, amelyet a Python nyelvben \u00edrtak, \u00e9s webalkalmaz\u00e1sok fejleszt\u00e9s\u00e9re szolg\u00e1l. A Django 3.0 \u00e1g a szok\u00e1sos t\u00e1mogat\u00e1si id\u0151szak\u00fa kiad\u00e1sok kateg\u00f3ri\u00e1j\u00e1ba tartozik, \u00e9s <noindex><a rel=\"nofollow\" href=\"https:\/\/www.djangoproject.com\/download\/#supported-versions\">friss\u00edt\u00e9seket fog kapni<\/a><\/noindex> 2021 \u00e1prilis\u00e1ig. A 2.22-es LTS \u00e1g 2022 \u00e1prilis\u00e1ig, m\u00edg az 1.11-es \u00e1g 2020 \u00e1prilis\u00e1ig lesz t\u00e1mogatva. A 2.1-es \u00e1g t\u00e1mogat\u00e1sa megsz\u0171nt. <\/p>\n<p>Kulcsok <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">fejleszt\u00e9sek<\/a><\/noindex>: <\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/howto\/deployment\/asgi\/\">A biztos\u00edtva<\/a><\/noindex> t\u00e1mogat\u00e1s az aszinkron m\u00f3dban val\u00f3 m\u0171k\u00f6d\u00e9shez, ASGI alkalmaz\u00e1s form\u00e1j\u00e1ban t\u00f6rt\u00e9n\u0151 v\u00e9grehajt\u00e1ssal. Az <noindex><a rel=\"nofollow\" href=\"https:\/\/asgi.readthedocs.io\/\">ASGI<\/a><\/noindex> (Asynchronous Server Gateway Interface) egy WSGI alternat\u00edv\u00e1jak\u00e9nt lett kifejlesztve, c\u00e9lja a szerverek, keretrendszerek \u00e9s aszinkron m\u0171k\u00f6d\u00e9st t\u00e1mogat\u00f3 alkalmaz\u00e1sok k\u00f6z\u00f6tti interakci\u00f3 biztos\u00edt\u00e1sa. A WSGI alap\u00fa ind\u00edt\u00e1s t\u00e1mogat\u00e1sa megmarad, a kapcsol\u00f3d\u00f3 aszinkron k\u00f3d csak ASGI alap\u00fa k\u00f6rnyezetekben t\u00f6rt\u00e9n\u0151 ind\u00edt\u00e1s eset\u00e9n ker\u00fcl alkalmaz\u00e1sra.\n<p>Aszinkron \u00fczemm\u00f3dhoz k\u00fcl\u00f6n esem\u00e9nykezel\u0151 ciklus (event loop) ker\u00fclt megval\u00f3s\u00edt\u00e1sra, amelyben nem enged\u00e9lyezett az 'async unsafe' megjel\u00f6l\u00e9s\u0171 k\u00f3d h\u00edv\u00e1sa. Ilyen k\u00f3d p\u00e9ld\u00e1ul az adatb\u00e1zis-m\u0171veletek (ORM), amelyeket nem lehet aszinkron k\u00f6rnyezetben haszn\u00e1lni (ebben az esetben SynchronousOnlyOperation hiba l\u00e9p fel), ezeket k\u00fcl\u00f6n szinkron sz\u00e1lba kell \u00e1thelyezni.<\/p>\n<li class=\"l\"> \u00daj speci\u00e1lis felsorol\u00e1si t\u00edpusok, a TextChoices, IntegerChoices \u00e9s Choices lettek hozz\u00e1adva, amelyeket <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#field-choices-enum-types\">haszn\u00e1lni<\/a><\/noindex> a modellek sz\u00f6veges \u00e9s eg\u00e9sz sz\u00e1m t\u00edpus\u00fa mez\u0151inek meghat\u00e1roz\u00e1s\u00e1hoz lehet haszn\u00e1lni, p\u00e9ld\u00e1ul, amikor olvashat\u00f3 c\u00edmk\u00e9k k\u00e9szleteit kell t\u00e1rolni a mez\u0151kben, amelyek bizonyos jellemz\u0151kbe ker\u00fclnek \u00e1tkonvert\u00e1l\u00e1sra:\n<p>   class YearInSchool(models.TextChoices):<br \/>\n        FRESHMAN = 'FR', _ ('Friss els\u0151\u00e9vfolyamos')<br \/>\n        SOPHOMORE = 'SO', _ ('M\u00e1sod\u00e9ves')<br \/>\n        JUNIOR = 'JR', _ ('Harmad\u00e9ves')<br \/>\n        SENIOR = 'SR', _ ('Negyed\u00e9ves')<br \/>\n        GRADUATE = 'GR', _ ('Diplom\u00e1s')<\/p>\n<li class=\"l\"> Hozz\u00e1adva a lehet\u0151s\u00e9g, hogy kifejez\u00e9seket adjon meg, amelyek <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#django.db.models.BooleanField\">BooleanField<\/a><\/noindex>, k\u00f6zvetlen\u00fcl a QuerySet sz\u0171r\u0151kben, azok el\u0151zetes annot\u00e1l\u00e1sa n\u00e9lk\u00fcl, a sz\u0171r\u0151 annot\u00e1ci\u00f3k alkalmaz\u00e1sa el\u0151tt.\n<li class=\"l\"> Hivatalos t\u00e1mogat\u00e1s biztos\u00edtva a MariaDB 10.1-es \u00e9s \u00fajabb kiad\u00e1sokhoz.\n<li class=\"l\"> A PostgreSQL-hez egy <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/contrib\/postgres\/constraints\/#django.contrib.postgres.constraints.ExclusionConstraint\">ExclusionConstraint<\/a><\/noindex> oszt\u00e1ly lett l\u00e9trehozva az kifejez\u00e9salap\u00fa korl\u00e1toz\u00e1sok haszn\u00e1lat\u00e1hoz. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/9.0\/ddl-constraints.html\">EXCLUDE<\/a><\/noindex>;\n<li class=\"l\"> A Python 3.5 t\u00e1mogat\u00e1sa megsz\u0171nt.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Forr\u00e1s: <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\/hu\/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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