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Ruby On Rails MCQs

What is best way to create primary key as a string field instead of integer in rails.

when creating a new table don't add primary key using this create_table users, :id => false do |t| t.string :id, :null => false ...... end execute("ALTER TABLE users ADD PRIMARY KEY (id)") if not using id as primary key then in users model add the following line class User < ActiveRecord::Base self.primary_key = "column_name" .... end

you can add a key to column name to make it primary create_table users :id => false do |t| t.string :column_name, :primary => true end

Answer

Correct Answer: when creating a new table don't add primary key using this create_table users, :id => false do |t| t.string :id, :null => false ...... end execute("ALTER TABLE users ADD PRIMARY KEY (id)") if not using id as primary key then in users model add the following line class User < ActiveRecord::Base self.primary_key = "column_name" .... end

Explanation:

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