TAGS:

ruby  rails  migration  database 

Related:

• Adding fields to table via migration.
• Creating migration file using generate migration
• Creation migration file using generate model.
• Creating migration file using scaffold.
• Drop tables using migration.
• Editing migration file manually.</li>
• Joining two tables via migration.
• Migration specific VERSION or STEP.
• Removing fields from tables via migration.
• Setting rails environment via migration command.
• Setup, reset and drop database
</ul>


Seeding Tables Using Migration In Rails.

Before starting, We assumes that you have a table `authors` and its `model`, if not, you can do

rails g scaffold author name

Seeding tables can be done by many ways: Open `db/seeds.rb` and paste

5.times do |i|
Author.create(name: "John#{i}"
end

First, Using `rake db:setup` if the database not set, where `rake db:setup` creates the database and make migrations and seed data from `db/seeds.rb`. Then, You can check the `authors` table using `console`. Second, Using

rake db:seed

Which insert `seeds` from `db/seeds.rb`. Last, Using migration as

rails g migration AddSeeds

This will create an empty migration file. Then paste this seeding code:

5.times do |i|
Author.create(name: "John#{i}"
end

Then,

rake db:migrate

Also, You can check the `authors` data using `rails c` or `browser` Note, You can delete these seeds using

rake db:rollback

Now, Take a look to this tutorial video: