CODEWITHSUNDEEP
ruby-on-rails
kasperite
kasperite

Reputation: 2478

Rails migration problems

Is it a good practice to insert new records through migration?Recently, I got a strange error when rerunning local migrations from scratch. It throws an errors like this(Eg: Product model, Cost column):

undefined method 'cost=' for #<Product:0x10f60f4b8>

Migration:

class AddNewProducts < ActiveRecord::Migration
  def self.up
    product1 = Product.new
    product1.cost = 10
    ....
    product1.save!
  end
end

Column cost was added in a migration previously:

Class AddCosttoProducts < ActiveRecord::Migration

    def self.up
      add_column :product, :cost, :integer, :default => 0, :null => false   
    end

    def self.down
      remove_column product, :cost
    end
end

Any hint on why it happens?

Upvotes: 0

Views: 109

Answers (1)

HungryCoder
HungryCoder

Reputation: 7616

If you already ran the previous migration (to add cost field), try resetting column information before you add records. 

class AddNewProducts < ActiveRecord::Migration
  def self.up
    Product.reset_column_information
    product1 = Product.new
    product1.cost = 10
    ....
    product1.save!
  end
end

Upvotes: 1

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