Search object by generated string by has_one associations - ruby-on-rails

Question

I'm trying to do a search on the generated model string, which is formed by has_one associations.
Here my models:
Street.rb
class Street < ActiveRecord::Base
has_many :houses
validates :street_type, presence: true
validates :name, presence: true, uniqueness: {:scope => :street_type, :case_sensitive => false }
def text
street_type + " " + name
end
end
House.rb
class House < ActiveRecord::Base
belongs_to :street
has_many :apartments
validates :street_id, presence: true
validates :number, presence: true
def text
street.text + ", " + number
end
end
Apartment.rb
class Apartment < ActiveRecord::Base
belongs_to :house
has_one :street, through => :house
has_many :accounts
validates :house_id, presence: true
validates :number, presence: true, uniqueness: {:scope => :house_id, :case_sensitive => false}
def text
house.text + ", ap. " + number
end
end
Account.rb
class Account < ActiveRecord::Base
belongs_to :appartment
has_one :house, :through => :appartment
belongs_to :resident
validates :appartment_id, presence: true
validates :resident_id, presence: true, uniqueness: {:scope => :appartment_id, :case_sensitive => false}
def text
uniq_id + " (" + appartment.text + ")"
end
end
I must search all accounts by matching some adress string. And I have no idea how to do it.
Example 1st account text "123-1123-122 (Regent street, 51, ap. 3)"
Example 2nd account text "123-1123-155 (Regent street, 51, ap. 6)"
Example search text "Regent street, 51"
Can somebody help me understand how to do that?

Answer 1

Search against joined fields
You are searching against Account#text, which is nowhere to be found in DB, unless you store it there (see "Search against full Apartment#text"), which (judging by the code) seems not to be the case. You can't use return values of your model methods in ActiveRecord queries. So first you need to parse street type and name, house number and apartment number from your search string.
Assuming you know street type and name, house number and apartment number, you should (minus bugs, I did not actually test that) be able to find the accounts by
Account.
joins(:apartment => { :house => :street }).
where('apartment.number' => apt_num,
'apartment.house.number' => house_num,
'apartment.house.street.name' => street_name,
'apartment.house.street.street_type' => street_type)
Your address information is higly structured. It may or may not be good. Without knowing any details I would suggest you to check if less structured or unstructured address information (plain text field) combined with full text search would work for you.
More on AR queries, see http://guides.rubyonrails.org/active_record_querying.html
Search against full Apartment#text
In case you don't want to parse names and numbers from the generated apartment text field, you need to have it stored in db. You can do it by hooking into before_save and updating a text field (let it be called cached_text) to contain Apartment#text.
class Apartment < ActiveRecord::Base
before_save :update_cached_text
def update_cached_text
self.cached_text = text
end
end
Now of course Apartment#cached_text will be out of sync if you change house number or street name or type. To keep it in sync you need to "resave" (see #touch) all associated apartments each time you save house or street.
Now you can search using full Apartment#text
Account.
joins(:apartment).
where('apartment.cached_text' => text)
or a substring of it
Account.
joins(:apartment).
where("apartment.cached_text LIKE '%?%'", text)

Answer 2

Try with following
Account.includes([:appartment => [:house => :street]]).where("CONCAT('accounts.uniq_id', ' (', 'streets.street_type', ' ', 'streets.name', ' ', 'houses.number', ', ap. ', 'houses.number', ')') like '%?%'", your_search_text)

Answer 3

your_result = Account.includes(:apartment, :apartment => :house, :apartment => {:house => :street}).where(:apartment => {:number => ...}).where(:house => {:number => ...}).where(:street => {:name => ...})