Ruby on Rails

On 28 May 2012 13:58, LuisRuby <alfamemoria@gmail.com> wrote:
> Thank you for your fast reply!
> Yes, I agree it isn't necessary to put a direct relation to country inside
> the city model. But I did it because sometimes the user will not know to
> which state a new city belongs to, and at least he will know the country.

With it in you could get into a situation where @city.country is not
the same as @city.state.country. Also note that @country.cities will
only include those accessed via state.

Please don't top post, it makes it difficult to follow the thread.
Insert you reply at appropriate points in the previous message.
Thanks.

Colin

>
> Luis
>
> Em segunda-feira, 28 de maio de 2012 03h27min39s UTC-3, Colin Law escreveu:
>>
>> On 28 May 2012 04:37, LuisRuby wrote:
>> > Hi friends!
>> > I'm relatively new with Rails and I'm struggling for a long time with
>> > this
>> > problem (it should have a pattern solution but until now I didn't find
>> > it):
>> > I have the following models: Institution, City, State and Country.
>> >
>> > class Country < ActiveRecord::Base
>> >   has_many :states
>> >   has_many :cities, :through => :states
>> > end
>> > # == Schema Information
>> > # Table name: countries
>> > #  id         :integer         not null, primary key
>> > #  sigla      :string(2)       not null
>> > #  nome       :string(30)      not null
>> >
>> > class State < ActiveRecord::Base
>> >   has_many   :cities
>> >   has_many   :institutions, :through => :cities
>> >   belongs_to :country
>> > end
>> > # == Schema Information
>> > # Table name: states
>> > #  id         :integer         not null, primary key
>> > #  country_id :integer     not null
>> > #  sigla      :string(2)      not null
>> > #  nome       :string(40)  not null
>> >
>> > class City < ActiveRecord::Base
>> >   has_many :institutions
>> >   belongs_to :country
>>
>> That is not right, a cities country is accessible through the state
>> via @city.state.country.
>>
>> >   belongs_to :state
>> > end
>> > # == Schema Information
>> > # Table name: cities
>> > #  id          :integer         not null, primary key
>> > #  country_id  :integer         not null
>>
>> Above is not needed.
>>
>> I have not even read the rest, you have provided much too much
>> information.  If you still have a problem then simplify it down to to
>> the smallest amount of code that demonstrates it and post that.
>>
>> Colin
>>
>> > #  state_id    :integer         not null
>> > #  nome        :string(40)      not null
>
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