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Multiple Singular Conversion Error in Rails Migrations?

I am new to Ruby On Rails and am trying to get to working with a name Priorities

So, here's the code I'm using in my migration:

class Priorities < ActiveRecord::Migration
  def self.up
    create_table :priorities do |t|
      t.column :name, :string, :null => false, :limit => 32
    end
    Priority.create :name => "Critical"
    Priority.create :name => "Major"
    Priority.create :name => "Minor"
  end

  def self.down
    drop_table :priorities
  end
end

This results in the following error:

NOTICE: CREATE TABLE will create implicit sequence "priorities_id_seq" for serial column "priorities.id"
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "priorities_pkey" for table "priorities"
rake aborted!
An error has occurred, this and all later migrations canceled:

uninitialized constant Priorities :: Priority

This is a problem with the translation ies

in y

to convert something into a single plural?

Also, the full log --trace

is here: http://pastebin.com/w6usBSng

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2 answers


Using the following command, I was able to get the same error:

script/generate migration priorities

This is because you don't have a class Priority

. You probably intended to run this command:

script/generate model Priority name:string

This fixes the problem



EDIT

Apparently you don't need a model Priority

. In this situation, I have no idea why, but you can get around this by using execute

migrations in your methods.

Try something like this:

class CreatePriorities < ActiveRecord::Migration
  def self.up
    create_table :priorities do |t|
      t.column :name, :string, :null => false, :limit => 32
    end

    execute "insert into priorities (name) values ('Critical');"
    execute "insert into priorities (name) values ('Major');"
    execute "insert into priorities (name) values ('Minor');"

  end

  def self.down
    drop_table :priorities
  end
en

d

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Yes. The name of your table is the priorities and the name of the model as well (I think). Priorities. So it breaks down to "Priority.create: name =>" Critical ". It should be



class Priorities < ActiveRecord::Migration
  def self.up
    create_table :priorities do |t|
      t.column :name, :string, :null => false, :limit => 32
    end
    Priorities.create :name => "Critical"  #Where "Priorities" is your Model Name
    Priorities.create :name => "Major"
    Priorities.create :name => "Minor"
  end

  def self.down
    drop_table :priorities
  end
end
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