{"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\/de\/blog\/news\/vypusk-web-frejmvorka-django-3-0","title":{"rendered":"Ver\u00f6ffentlichung des Web-Frameworks 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\/\">Hat stattgefunden<\/a><\/noindex>  Release des Web-Frameworks <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">Django 3.0<\/a><\/noindex>, geschrieben in der Programmiersprache Python und gedacht f\u00fcr die Entwicklung von Webanwendungen. Die Version Django 3.0 geh\u00f6rt zur Kategorie der regul\u00e4ren Unterst\u00fctzungsversionen und wird <noindex><a rel=\"nofollow\" href=\"https:\/\/www.djangoproject.com\/download\/#supported-versions\">die<\/a><\/noindex> bis April 2021 aktualisiert. Die LTS-Version 2.22 wird bis April 2022 unterst\u00fctzt, w\u00e4hrend die Version 1.11 bis April 2020 unterst\u00fctzt wird. Die Unterst\u00fctzung f\u00fcr die Version 2.1 wurde eingestellt. <\/p>\n<p>Hauptmerkmale <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">Verbesserungen<\/a><\/noindex>: <\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/howto\/deployment\/asgi\/\">Bereitgestellt<\/a><\/noindex> unterst\u00fctzt die Ausf\u00fchrung im asynchronen Modus in Form einer ASGI-Anwendung. Die Programmierschnittstelle <noindex><a rel=\"nofollow\" href=\"https:\/\/asgi.readthedocs.io\/\">ASGI<\/a><\/noindex> (Asynchronous Server Gateway Interface) wurde als Ersatz f\u00fcr WSGI entwickelt und zielt darauf ab, die Interaktion zwischen Servern, Frameworks und Anwendungen, die asynchron arbeiten, zu gew\u00e4hrleisten. Die Unterst\u00fctzung f\u00fcr die Ausf\u00fchrung mit WSGI bleibt erhalten, und der mit dem asynchronen Modus verbundene Code wird nur in Umgebungen, die auf ASGI basieren, ausgef\u00fchrt.\n<p>F\u00fcr den asynchronen Modus wurde eine separate Ereignisschleife (event loop) implementiert, in der die Ausf\u00fchrung von als \u201easync unsafe\u201c markiertem Code nicht gestattet ist. Zu solchem Code z\u00e4hlen beispielsweise Operationen mit Datenbanken (ORM), die im asynchronen Kontext nicht verwendet werden k\u00f6nnen (in diesem Fall wird ein Fehler SynchronousOnlyOperation angezeigt), und sollten in einen separaten synchronen Thread ausgelagert werden.<\/p>\n<li class=\"l\"> Es wurden spezialisierte Enumerationen f\u00fcr TextChoices, IntegerChoices und Choices hinzugef\u00fcgt, die man <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#field-choices-enum-types\">man bereits etwas braucht (ich arbeite mit dem clusterf\u00e4higen Proxmox VE 5.x und ZFS \u00fcber iSCSI).<\/a><\/noindex> zur Definition von Text- und Ganzzahlfeldern in Modellen verwenden kann, beispielsweise zur Speicherung von Sets lesbarer Bezeichnungen, die in bestimmte Merkmale \u00fcbersetzt werden:\n<p>   class YearInSchool(models.TextChoices):<br \/>\n        FRESHMAN = 'FR', _('Freshman')<br \/>\n        SOPHOMORE = 'SO', _('Sophomore')<br \/>\n        JUNIOR = 'JR', _('Junior')<br \/>\n        SENIOR = 'SR', _('Senior')<br \/>\n        GRADUATE = 'GR', _('Graduate')<\/p>\n<li class=\"l\"> Die M\u00f6glichkeit zur Angabe von Ausdr\u00fccken wurde hinzugef\u00fcgt, die <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#django.db.models.BooleanField\">BooleanField<\/a><\/noindex>, direkt in QuerySet-Filtern ohne vorherige Annotation angewendet werden k\u00f6nnen, bevor sie zur Filterung von Annotationen verwendet werden.\n<li class=\"l\"> Die offizielle Unterst\u00fctzung f\u00fcr die Datenbank MariaDB 10.1 und neuere Versionen wurde sichergestellt.\n<li class=\"l\"> F\u00fcr PostgreSQL wurde die Klasse <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/contrib\/postgres\/constraints\/#django.contrib.postgres.constraints.ExclusionConstraint\">ExclusionConstraint<\/a><\/noindex> implementiert, um Einschr\u00e4nkungen auf Basis von Ausdr\u00fccken zu verwenden. <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/9.0\/ddl-constraints.html\">AUSSCHLIESSEN<\/a><\/noindex>;\n<li class=\"l\"> Die Unterst\u00fctzung f\u00fcr Python 3.5 wurde eingestellt.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Quelle: <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 5.0.1.1 - 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\/de\/blog\/news\/vypusk-web-frejmvorka-django-3-0\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<meta 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