{"id":37451,"date":"2023-10-30T06:20:16","date_gmt":"2023-10-30T06:20:16","guid":{"rendered":"https:\/\/www.railscarma.com\/?p=37451"},"modified":"2023-10-30T06:20:21","modified_gmt":"2023-10-30T06:20:21","slug":"modelli-di-database-e-migrazioni-in-rail-con-sql-server","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/it\/blog\/modelli-di-database-e-migrazioni-in-rail-con-sql-server\/","title":{"rendered":"Modelli di database e migrazioni in Rails con SQL Server"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"37451\" class=\"elementor elementor-37451\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1231ecb elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1231ecb\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-ff5a101\" data-id=\"ff5a101\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a3745e9 elementor-widget elementor-widget-text-editor\" data-id=\"a3745e9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Ruby on Rails \u00e8 un potente framework per applicazioni web che offre un modo conveniente per interagire con i database. Quando si lavora con SQL Server come sistema di gestione dei database, \u00e8 fondamentale capire come definire i modelli di database e gestire le modifiche allo schema utilizzando le migrazioni di Rails. In questo articolo, vedremo il processo di creazione di un modello di database. <b>modelli di database e migrazioni nell&#039;applicazione Rails<\/b> utilizzando SQL Server come backend del database.<\/p>\n<h2><strong>Prerequisiti<\/strong><\/h2>\n<ul>\n<li>Ruby on Rails installato sul tuo sistema.<\/li>\n<li>Un&#039;istanza di SQL Server configurata e accessibile.<\/li>\n<\/ul>\n<h2><b>Creazione di una nuova applicazione Rails<\/b><\/h2>\n<p>Iniziamo creando una nuova applicazione Rails. Aprite il vostro terminale ed eseguite il seguente comando:<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 gizmo:dark:bg-token-surface-primary px-4 py-2 text-xs font-sans justify-between rounded-t-md\">bash<\/div>\n<div class=\"p-4 overflow-y-auto\">\n<pre class=\"prettyprint lang-mssql prettyprinted\"><span class=\"pln\">rotaie nuovo sql_server_rails_app<\/span><\/pre>\n<\/div>\n<\/div>\n<p>Questo comando generer\u00e0 una nuova applicazione Rails denominata&nbsp;<code>sql_server_rails_app<\/code>. Passare alla directory del progetto:<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 gizmo:dark:bg-token-surface-primary px-4 py-2 text-xs font-sans justify-between rounded-t-md\">bash<\/div>\n<div class=\"p-4 overflow-y-auto\">\n<pre class=\"prettyprint lang-mssql prettyprinted\"><span class=\"pln\">cd sql_server_rails_app<\/span><\/pre>\n<\/div>\n<\/div>\n<p>Per configurare SQL Server come database, aprire il file&nbsp;<code>config\/database.yml<\/code>&nbsp;file e modificarlo come segue:<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 gizmo:dark:bg-token-surface-primary px-4 py-2 text-xs font-sans justify-between rounded-t-md\">yaml<\/div>\n<div class=\"p-4 overflow-y-auto\">\n<pre class=\"prettyprint lang-mssql prettyprinted\"><span class=\"kwd\">predefinito<\/span><span class=\"pun\">:<\/span> <span class=\"pun\">&amp;<\/span><span class=\"kwd\">predefinito<\/span><span class=\"pln\">\n  adattatore<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> ospite sqlserver<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> nome utente dell&#039;host locale<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> il tuo_nome utente password<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> la tua password\n  <\/span><span class=\"kwd\">Banca dati<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> porta nome_tuo_database<\/span><span class=\"pun\">:<\/span> <span class=\"lit\">1433<\/span><\/pre>\n<\/div>\n<\/div>\n<p>Sostituire&nbsp;<code>il tuo nome utente<\/code>,&nbsp;<code>la tua password<\/code>, E&nbsp;<code>tuo_nome_database<\/code>&nbsp;con le credenziali di SQL Server e il nome del database desiderato.<\/p>\n<h2><b>Creazione di un modello di database<\/b><\/h2>\n<p>Creiamo un semplice modello di database per un'applicazione blog. Eseguire il seguente comando per generare un modello&nbsp;<code>Inviare<\/code>&nbsp;modello con attributi:<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 gizmo:dark:bg-token-surface-primary px-4 py-2 text-xs font-sans justify-between rounded-t-md\">bash<\/div>\n<div class=\"p-4 overflow-y-auto\">\n<pre class=\"prettyprint lang-mssql prettyprinted\"><span class=\"pln\">i binari generano il titolo del post del modello<\/span><span class=\"pun\">:<\/span><span class=\"pln\">corpo della corda<\/span><span class=\"pun\">:<\/span><span class=\"pln\">testo<\/span><\/pre>\n<\/div>\n<\/div>\n<p>Questo comando creer\u00e0 un file di migrazione nel file&nbsp;<code>db\/migrazione<\/code>&nbsp;directory e un file di modello corrispondente nel file&nbsp;<code>app\/modelli<\/code>&nbsp;directory.<\/p>\n<h2><b>Creare una migrazione<\/b><\/h2>\n<p>Apri il file di migrazione generato nel file&nbsp;<code>db\/migrazione<\/code>&nbsp;directory. Avr\u00e0 un nome come&nbsp;<code>xxxxxx_create_posts.rb<\/code>, Dove&nbsp;<code>xxxxxx<\/code>&nbsp;\u00e8 un timestamp. Aggiungi le colonne necessarie al file&nbsp;<code>crea tabella<\/code>&nbsp;bloccare:<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 gizmo:dark:bg-token-surface-primary px-4 py-2 text-xs font-sans justify-between rounded-t-md\">rubino<\/div>\n<div class=\"p-4 overflow-y-auto\">\n<pre class=\"prettyprint lang-mssql prettyprinted\"><span class=\"pln\">classe CreaPost <\/span><span class=\"pun\">&lt;<\/span><span class=\"pln\"> Registrazione attiva<\/span><span class=\"pun\">::<\/span><span class=\"pln\">Migrazione<\/span><span class=\"pun\">[<\/span><span class=\"lit\">6.1<\/span><span class=\"pun\">]<\/span><span class=\"pln\">\n  def cambia crea_tabella <\/span><span class=\"pun\">:<\/span><span class=\"pln\">i post lo fanno <\/span><span class=\"pun\">|<\/span><span class=\"pln\">T<\/span><span class=\"pun\">|<\/span><span class=\"pln\">\n      T<\/span><span class=\"pun\">.<\/span><span class=\"pln\">corda <\/span><span class=\"pun\">:<\/span><span class=\"pln\">titolo t<\/span><span class=\"pun\">.<\/span><span class=\"pln\">testo <\/span><span class=\"pun\">:<\/span><span class=\"pln\">corpo t<\/span><span class=\"pun\">.<\/span><span class=\"pln\">timestamp\n    <\/span><span class=\"kwd\">FINE<\/span>\n  <span class=\"kwd\">FINE<\/span>\n<span class=\"kwd\">FINE<\/span><\/pre>\n<\/div>\n<\/div>\n<p>Questa migrazione crea a&nbsp;<code>post<\/code>&nbsp;tavolo con&nbsp;<code>titolo<\/code>&nbsp;E&nbsp;<code>corpo<\/code>&nbsp;colonne.<\/p>\n<h2><b>Esecuzione di migrazioni<\/b><\/h2>\n<p>Per applicare la migrazione e creare il file&nbsp;<code>post<\/code>&nbsp;tabella nel database SQL Server, eseguire il comando seguente:<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 gizmo:dark:bg-token-surface-primary px-4 py-2 text-xs font-sans justify-between rounded-t-md\">bash<\/div>\n<div class=\"p-4 overflow-y-auto\">\n<pre class=\"prettyprint lang-mssql prettyprinted\"><span class=\"pln\">rotaie db<\/span><span class=\"pun\">:<\/span><span class=\"pln\">migrare<\/span><\/pre>\n<\/div>\n<\/div>\n<p>Questo comando eseguir\u00e0 tutte le migrazioni in sospeso e aggiorner\u00e0 di conseguenza lo schema del database.<\/p>\n<h2><b>Utilizzo del modello<\/b><\/h2>\n<p>Ora che il&nbsp;<code>Inviare<\/code>&nbsp;vengono creati il modello e la tabella, puoi utilizzarli nel tuo&nbsp;<a href=\"https:\/\/www.railscarma.com\/it\/\">Applicazione delle rotaie<\/a>. Ad esempio, puoi creare un nuovo post nel tuo controller:<\/p>\n<div class=\"bg-black rounded-md mb-4\">\n<div class=\"flex items-center relative text-gray-200 bg-gray-800 gizmo:dark:bg-token-surface-primary px-4 py-2 text-xs font-sans justify-between rounded-t-md\">rubino<\/div>\n<div class=\"p-4 overflow-y-auto\">\n<pre class=\"prettyprint lang-mssql prettyprinted\"><span class=\"pln\">classe PostController <\/span><span class=\"pun\">&lt;<\/span><span class=\"pln\"> ApplicationController def <\/span><span class=\"kwd\">creare<\/span>\n    <span class=\"pun\">@<\/span><span class=\"pln\">inviare <\/span><span class=\"pun\">=<\/span><span class=\"pln\"> Inviare<\/span><span class=\"pun\">.<\/span><span class=\"pln\">nuovo<\/span><span class=\"pun\">(<\/span><span class=\"pln\">post_params<\/span><span class=\"pun\">)<\/span>\n    <span class=\"kwd\">Se<\/span> <span class=\"pun\">@<\/span><span class=\"pln\">inviare<\/span><span class=\"pun\">.<\/span><span class=\"kwd\">salva<\/span><span class=\"pln\">\n      reindirizza_a <\/span><span class=\"pun\">@<\/span><span class=\"pln\">inviare<\/span><span class=\"pun\">,<\/span><span class=\"pln\"> avviso<\/span><span class=\"pun\">:<\/span> <span class=\"str\">&#039;Il post \u00e8 stato creato con successo.&#039;<\/span>\n    <span class=\"kwd\">altro<\/span><span class=\"pln\">\n      rendere <\/span><span class=\"pun\">:<\/span><span class=\"pln\">nuovo\n    <\/span><span class=\"kwd\">FINE<\/span>\n  <span class=\"kwd\">FINE<\/span><span class=\"pln\">\n  private def post_params params<\/span><span class=\"pun\">.<\/span><span class=\"pln\">richiedere<\/span><span class=\"pun\">(:<\/span><span class=\"pln\">inviare<\/span><span class=\"pun\">).<\/span><span class=\"pln\">permesso<\/span><span class=\"pun\">(:<\/span><span class=\"pln\">titolo<\/span><span class=\"pun\">,<\/span> <span class=\"pun\">:<\/span><span class=\"pln\">corpo<\/span><span class=\"pun\">)<\/span>\n  <span class=\"kwd\">FINE<\/span>\n<span class=\"kwd\">FINE<\/span><\/pre>\n<\/div>\n<\/div>\n<h2><b>Conclusione<\/b><\/h2>\n<p>In questo post abbiamo appreso come creare modelli di database e migrazioni in un file <a href=\"https:\/\/www.railscarma.com\/it\/sviluppo-di-applicazioni-per-binari-personalizzati\/\">Applicazione Ruby on Rails<\/a> utilizzando SQL Server come backend del database. Ora puoi iniziare a creare la tua applicazione con la potenza e la flessibilit\u00e0 di Rails sfruttando al tempo stesso le funzionalit\u00e0 di SQL Server per l&#039;archiviazione e il recupero dei dati.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t  <div class=\"related-post slider\">\r\n        <div class=\"headline\">Articoli correlati<\/div>\r\n    <div class=\"post-list owl-carousel\">\r\n\r\n            <div class=\"item\">\r\n            <div class=\"thumb post_thumb\">\r\n    <a  title=\"Cos&#039;\u00e8 e come funziona Offliberty Ruby Gem\" href=\"https:\/\/www.railscarma.com\/it\/blog\/what-is-offliberty-ruby-gem-and-how-it-works\/?related_post_from=41304\">\r\n\r\n      <img decoding=\"async\" width=\"800\" height=\"300\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2026\/04\/What-is-Offliberty-Ruby-Gem-and-How-It-Works.png\" class=\"attachment-full size-full wp-post-image\" 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Quando si lavora con SQL Server come sistema di gestione del database, \u00e8 fondamentale comprendere come definire i modelli di database e gestire le modifiche dello schema utilizzando le migrazioni di Rails. In questo articolo, esamineremo il processo di creazione del database...<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.railscarma.com\/it\/blog\/ruby-regex-match-guide-with-examples\/\"> <span class=\"screen-reader-text\">Ruby Regex Match Guide (2026) with Examples<\/span> Leggi altro \"<\/a><\/p>","protected":false},"author":5,"featured_media":37459,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1224],"tags":[],"class_list":["post-37451","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Database Models and Migrations in Rails with SQL Server - RailsCarma<\/title>\n<meta name=\"description\" content=\"Efficiently manage Rails database models and migrations with SQL Server. 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