Error before updating scaffolding from new db schema
In this Ruby on Rails tutorial, I will show how to create a Rails instance from an existing My SQL database.I have an existing site that used Codeigniter and a My SQL DB, and I want to more or less convert that site into a Ruby on Rails site.For example, if you’re using bash or another variant of the Bourne Shell: What we want is a simple page that just prints the message "Hello World! In Grails, whenever you want a new page you just create a new controller action for it.Since we don’t yet have a controller, let’s create one now with the create-controller command: directory?I would like to make things as automatic as possible so I don't have to manually port any of the existing data or create the model properties. I'm going to follow the guidelines in the Rails Guides for configuring a My SQL DB.I found this thread on that explains the basics of how to migrate an existing My SQL DB so it works with Rails. The guidelines say that I should change my config/file to look something like this: With some small tweaks to match my local environment, I'm ready for step 2: 2.Download the appropriate JDK for your operating system, run the installer, and then set up an environment variable called On some platforms (for example OS X) the Java installation is automatically detected.However in many cases you will want to manually configure the location of Java.
Entity Framework Migrations are handled from the package manager console in Visual Studio.
I run 'mysqladmin variables | grep socket' from the command line and find out that my socket file is located at '/Applications/XAMPP/xamppfiles/var/mysql/mysql.sock' because, of course, I'm running XAMPP for my My SQL server. It seemingly faithfully describes the tables and fields of my DB.
So I create a '/db/migrate' folder, copy my 'schema.rb' file into it, rename it '001_create_database.rb' and wrap the schema as suggested by the thread: (Note the updated class name.) All good now.
This may include adding or dropping tables, columns, indexes and foreign keys.
Generally, the SQL upgrade script provided with each new version does a decent job of modifying the existing database to match the new schema.