Tīmeklis2011. gada 8. aug. · 近来由于新项目的需要，把系统的rails版本升级到了2.0.2，可是这个rails版本并不与旧版本兼容，导致使用老版本开发的项目出现诸多问题。如何解决多项目对应多rails版本的问题呢？今天发现一个很管用的rake脚本，命令如下（项目目录下执行 ） rake rails:freeze:gems 这个命令是根据你的RAILS_ROOT/config ... $ rake db:create When you createyour Rails application for the first time, it will not have a database yet. In order for it to start, you will need to make sure the database is up and running. Just like it's recommended to use different gems for each environment, you should also create three databases, each for … Skatīt vairāk rake db:migrate Migrations setup the tables in the database. When you run the migration command, it will look in db/migrate/ for any ruby files and execute them starting with the oldest. There is a timestampat the … Skatīt vairāk rake db:rollback Did you create a migration without wanting it or you simply changed your mind about it? Fear not!When you run this command, it will look at the last migration created and undo it! Example: Let’s … Skatīt vairāk rake db:schema:load Unlike rake db:migrate that runs migrations that have not run yet, rake db:schema:load loads the schema that is already generated in db/schema.rbinto … Skatīt vairāk rake db:seed We always have default data that we want to have in our application for testing purposes. The seed commandexists to automate this process. Example: Create … Skatīt vairāk
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