rake dbcreate

1. What does rake db create do?
2. What is rake db?
3. What does Rails DB schema load do?
4. What does DB drop do?
5. What is DB migration rails?
6. How do I create a Rails database?
7. What rake means?
8. What is the rails command to create controller?
9. What is bundle exec?
10. How does Rails know which migrations to run?
11. How do I run a specific migration in Rails?
12. What is the command to start rails server?

What does rake db create do?

All Rails db Rake Tasks and What They Do

• db:create Creates the database for the current RAILS_ENV environment. ...
• db:create:all Creates the database for all environments.
• db:drop Drops the database for the current RAILS_ENV environment. ...
• db:drop:all Drops the database for all environments.

What is rake db?

#rails #database. Nesha Zoric Mar 26, 2018 ・4 min read. Rake is a utility built into Ruby and Rails, which provides an efficient way for managing database changes. You can easily migrate database changes to servers by only using a command line!

What does Rails DB schema load do?

rake db:schema:load is great for the first time you put a system in production. After that you should run migrations normally. This also helps you cleaning your migrations whenever you like, since the schema has all the information to put other machines in production even when you cleaned up your migrations.

What does DB drop do?

Dropping a database deletes the database from an instance of SQL Server and deletes the physical disk files used by the database. If the database or any one of its files is offline when it is dropped, the disk files are not deleted. These files can be deleted manually by using Windows Explorer.

What is DB migration rails?

Rails Migration allows you to use Ruby to define changes to your database schema, making it possible to use a version control system to keep things synchronized with the actual code. ... Production servers − Run "rake migrate" when you roll out a new release to bring the database up to date as well.

How do I create a Rails database?

To create a new MySQL database for a Rails application:

1. Start the MySQL command line client, as shown below. Enter the password for the MySQL root user. ...
2. At the MySQL prompt, run the following commands. ...
3. Edit the config/database.yml file in your Rails project directory and update the database configuration.

What rake means?

Freebase. Rake. A rake, short for rakehell, is a historic term applied to a man who is habituated to immoral conduct, frequently a heartless womanizer. Often a rake was a prodigal who wasted his fortune on gambling, wine, women and song, incurring lavish debts in the process.

What is the rails command to create controller?

Browser – Google Chrome Web Browser.

1. Open the Ruby On Rails Command Prompt By Going To Start >> All Programmes >> Railsinstaller >> Command Prompt with Ruby and Rails. ...
2. Now, we generate controller and view but before you generate the controller, you must enter the application folder by using simple cd/ command.

What is bundle exec?

bundle exec is a Bundler command to execute a script in the context of the current bundle (the one from your directory's Gemfile). ... In some cases, running executables without bundle exec may work, if the executable happens to be installed in your system and does not pull in any gems that conflict with your bundle.

How does Rails know which migrations to run?

1 Answer. Rails creates a table in your database called schema_migrations to keep track of which migrations have run. The table contains a single column, version . When Rails runs a migration, it takes the leading digits in the migration's file name and inserts a row for that "version", indicating it has been run.

How do I run a specific migration in Rails?

To run a specific migration up or down, use db:migrate:up or db:migrate:down . The version number in the above commands is the numeric prefix in the migration's filename. For example, to migrate to the migration 20160515085959_add_name_to_users. rb , you would use 20160515085959 as the version number.

What is the command to start rails server?

Go to your browser and open http://localhost:3000, you will see a basic Rails app running. You can also use the alias "s" to start the server: bin/rails s . The server can be run on a different port using the -p option. The default development environment can be changed using -e .