PG::StringDataRightTruncation: ERROR: PostgreSQL string(255) limit | Heroku

Question

I Have a Listings controller and users can add a description. If the description is long, which it should be, I receive this error in Heroku:

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Answer 1

Do not edit your previous migrations. Never do that, as a rule. Instead you'll create a new migration that will make the change (and allow you to rollback if necessary.)

First, generate the migration:

rails g migration change_datatype_on_TABLE_from_string_to_text

Then edit the generated file so that looks something like (change the table and column names as necessary):

class ChangeDatatypeOnTableFromStringToText < ActiveRecord::Migration
  def up
    change_column :table_name, :column_name, :text, :limit => nil
  end

  def down
    change_column :table_name, :column_name, :string
  end
end

Now run the migration:

bundle exec rake db:migrate

That should do it. (Note I defined the up and down methods individually instead of using the change method because using the change method only works with reversible migrations, and trying to rollback a datatype change would throw a ActiveRecord::IrreversibleMigration exception.)

Answer 2

The input given is too long for a string field, so just change to a text field:

class ChangeListingsDescriptionTypeToText < ActiveRecord::Migration
  def change
    change_column :listings, :description, :text
  end
end

Then run rake db:migrate

Answer 3

It would seem that specifying the column as a :text type and not a :string would fix this problem.