Schema.rb understanding in Ruby on Rails - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a new table in schema.rb.

Ruby on Rails

create_table :users do |[1]|
  t.string :name
end

Drag options to blanks, or click blank then click option'

At

Buser

Ccolumn

Dtable

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'table' or 'user' instead of the block variable 't'.

Using 'column' which is not the block variable.

The block variable is usually t to define columns inside create_table.

2fill in blank

medium

Complete the code to add a datetime column for tracking record creation.

Ruby on Rails

t.[1] :created_at

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Adate

Bdatetime

Ctimestamp

Dtime

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'timestamp' which is not the Rails schema.rb type.

Using 'date' or 'time' which store only part of the information.

In Rails schema.rb, datetime is used for date and time columns like created_at.

3fill in blank

hard

Fix the error in the schema.rb code to add a string column with a limit of 50 characters.

Ruby on Rails

t.string :username, [1]: 50

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Alength

Bmax

Climit

Dsize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'length' or 'size' which are not valid options here.

Using 'max' which is not recognized.

The correct option to limit string length in schema.rb is limit.

4fill in blank

hard

Fill both blanks to add an index on the email column and make it unique.

Ruby on Rails

add_index :users, :email, [1]: true, [2]: 'index_users_on_email'

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Aunique

Bname

Cindex_name

Dprimary

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'primary' instead of 'unique' for uniqueness.

Using 'index_name' which is not a valid option.

To add a unique index, use unique: true. The index name is set with name:.

5fill in blank

hard

Fill all three blanks to create a table without the default id column, with a text column, and timestamps.

Ruby on Rails

create_table :posts, id: [1] do |[2]|
  [2].text :content
  [2].timestamps
end

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Afalse

Btrue

Ct

Dp

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'true' for id which includes the default id column.

Using 'p' as block variable which is uncommon.

Setting id: false disables default id. The block variable is t used to define columns and timestamps.