Table seems lost when I try to I define a 'Campus' model in rails and set the plural name myself

问题

I need a table whos name is Campus. But rails interprets that as plural, messing everything up. So I did a little research and they suggest to add an inflection like this:

ActiveSupport::Inflector.inflections do |inflect|
  inflect.singular /^(campus)(es)?$/i, '\1'
  inflect.plural   /^(campus)$/i, '\1es'
end

I have added this in the initializers/inflection.rb file. I created a new migration to drop the table and create a new one again called Campus, expecting to have the problem solved, but now I can't get the table Campus in the console:

$ rails console
Loading development environment (Rails 3.0.10)
1.9.2p290 :001 > Campus
 => Campus(Table doesn't exist)

What am I doing wrong? How can I fix this problem? Thanks for your help

My campus model is:

class Campus < ActiveRecord::Base

  validates_presence_of :name
  validates_presence_of :university_id

  has_many :pois, dependent: :destroy
  has_many :events, dependent: :destroy
  has_many :market_items, dependent: :destroy
  has_many :ads_points, dependent: :destroy
  belongs_to :university
end

回答1:

inflectors.rb has some standard code that you can adjust for your situation:

# inflect.plural /^(ox)$/i, '\1en'
# inflect.singular /^(ox)en/i, '\1'
# inflect.irregular 'person', 'people'

So for you it should be:

inflect.plural /^(campus)$/i, '\1es'
inflect.singular /^(campus)es/i, '\1'

Or this maybe even easier:

inflect.irregular 'campus', 'campuses'

With these inflectors Rails will be looking for a table called campuses. Since your table name is campus, you have to add the following to your Campus model:

set_table_name 'campus'

Be sure to restart your server after making changes to inflectors.rb.

来源：https://stackoverflow.com/questions/11943432/table-seems-lost-when-i-try-to-i-define-a-campus-model-in-rails-and-set-the-p

标签

database

ruby-on-rails-3