{"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\/it\/blog\/news\/vypusk-web-frejmvorka-django-3-0","title":{"rendered":"Rilascio del framework web 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\/\">Si \u00e8 tenuto<\/a><\/noindex>  rilascio del framework web <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">Django 3.0<\/a><\/noindex>, scritto in Python e destinato allo sviluppo di applicazioni web. La versione Django 3.0 \u00e8 classificata come rilascio con supporto standard e sar\u00e0 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.djangoproject.com\/download\/#supported-versions\">a ottenere<\/a><\/noindex> aggiornata fino ad aprile 2021. Il ramo LTS 2.22 sar\u00e0 supportato fino ad aprile 2022, mentre il ramo 1.11 fino ad aprile 2020. Il supporto per il ramo 2.1 \u00e8 stato interrotto. <\/p>\n<p>Le chiave <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/releases\/3.0\/\">miglioramenti<\/a><\/noindex>: <\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/howto\/deployment\/asgi\/\">\u00c8 stata fornita<\/a><\/noindex> supporto per il funzionamento in modalit\u00e0 asincrona con esecuzione come applicazione ASGI. L'interfaccia <noindex><a rel=\"nofollow\" href=\"https:\/\/asgi.readthedocs.io\/\">ASGI<\/a><\/noindex> (Asynchronous Server Gateway Interface) \u00e8 stata sviluppata come sostituzione del WSGI, mirata a garantire l'interazione tra server, framework e applicazioni che supportano l'esecuzione in modalit\u00e0 asincrona. \u00c8 mantenuto il supporto per l'avvio utilizzando WSGI, mentre il codice correlato alla modalit\u00e0 asincrona viene incluso solo quando si avvia in ambienti basati su ASGI.\n<p>Per la modalit\u00e0 asincrona, \u00e8 stato implementato un ciclo di gestione degli eventi separato (event loop), nel quale non \u00e8 consentita l'esecuzione di codice contrassegnato come &#171;async unsafe&#187;. A questo tipo di codice appartengono, ad esempio, le operazioni con il DBMS (ORM), che non possono essere utilizzate in un contesto asincrono (in questo caso verr\u00e0 restituito l'errore SynchronousOnlyOperation) e devono essere gestite in un thread sincrono separato.<\/p>\n<li class=\"l\"> Sono stati aggiunti tipi enumerati specializzati TextChoices, IntegerChoices e Choices, che possono <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#field-choices-enum-types\">di utilizzare<\/a><\/noindex> essere utilizzati per definire campi testuali e interi nel modello, ad esempio, quando \u00e8 necessario memorizzare nei campi set di etichette leggibili, tradotte in specifici attributi:\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\"> \u00c8 stata aggiunta la possibilit\u00e0 di specificare espressioni che restituiscono <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/models\/fields\/#django.db.models.BooleanField\">BooleanField<\/a><\/noindex>, direttamente nei filtri QuerySet senza bisogno di annotarli in anticipo, prima dell'applicazione per la filtrazione delle annotazioni.\n<li class=\"l\"> \u00c8 stato garantito il supporto ufficiale per i database MariaDB 10.1 e versioni pi\u00f9 recenti.\n<li class=\"l\"> Per PostgreSQL \u00e8 stato implementato il classe <noindex><a rel=\"nofollow\" href=\"https:\/\/docs.djangoproject.com\/en\/3.0\/ref\/contrib\/postgres\/constraints\/#django.contrib.postgres.constraints.ExclusionConstraint\">ExclusionConstraint<\/a><\/noindex> per utilizzare vincoli basati su espressioni <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/9.0\/ddl-constraints.html\">ESCLUDI<\/a><\/noindex>;\n<li class=\"l\"> Il supporto per Python 3.5 \u00e8 stato interrotto.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <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\/it\/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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