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Ruby ActiveRecord Basics Migrations and Relationships Migrations

David Ker
David Ker
14,439 Points
Posted by David Ker
David Ker
14,439 Points

Migrations 2 code challenge - can't get it to accept an answer

Having issues with the Migrations 2 code challenge...I've tried rails generate migration CreateContacts first_name:string last_name:string, and variations on it, but it keeps saying "The first argument should be the name of the table"...even though it is, through CreateContacts...which matches the default migration in the Migrations 1 code challenge.

Anyone have any hints??

4 Answers

Salman Akram
Salman Akram
Courses Plus Student 40,065 Points

Hi David,

I found errors that you use this variable called "CreateContacts" from the Migration Challenge 1 but Challenge 2, you will find new variable called "contacts"

Question: In the last question, we created a table called contacts, with a first_name and last_name string. How could you include both of those fields automatically by using the generator command?

Answers: Just remove CreateContacts, you should use just "contacts"

rails generate migration contacts first_name:string last_name:string
sunless
sunless
8,937 Points

But this is actually wrong. If you do so, rails will generate a migration named

datestamp_contact

with 

class Contact < ActiveRecord::Migration
  def change
  end
end

in it. Which is certainly not what you want.

Instead using:

rails generate migration AddXXXToContact first_Name:string last_name:string

will generate

class AddXXXToContact < ActiveRecord::Migration
  def change
    add_column :contact, :first_name, :string
    add_column :contact, :last_name, :string
  end
end

You might want to fix the challenge accordingly...

David Ker
David Ker
14,439 Points
David Ker
David Ker
14,439 Points

That did it, thanks! I thought I had tried using contacts before. Oh well...thanks again!!

Sarah A. Morrigan
Sarah A. Morrigan
14,329 Points
Sarah A. Morrigan
Sarah A. Morrigan
14,329 Points

I still get error on 

rails generate migration contacts first_name:string last_name:string
rake db:migrate

"Bummer! The fields should be specified with a colon separating the name and the type."

name:type is there.

I am right, and the Code Challenge is wrong.

Sarah A. Morrigan
Sarah A. Morrigan
14,329 Points
Sarah A. Morrigan
Sarah A. Morrigan
14,329 Points

nevermind... i did not have to put rake db:migrate