feat: Refactor Airline controller to use offset and limit parameters

Author: teetangh

app/controllers/api/v1/airlines_controller.rb

@@ -81,12 +81,7 @@ def index
         offset = params[:offset] || 0
 
         begin
-          airlines = if country.present?
-                       Airline.list_by_country(key: [country, limit, offset])
-                     else
-                       # TODO: Implement pagination
-                       Airline.all
-                     end
+          airlines = Airline.list_by_country_or_all(key: [country, limit, offset])
 
           airlines = airlines.pluck(:callsign, :country, :iata, :icao, :name)
           formatted_airlines = airlines.map do |airline|
@@ -115,7 +110,6 @@ def to_airport
         limit = params[:limit] || 10
         offset = params[:offset] || 0
 
-        puts "Destination airport: #{destination_airport}, limit: #{limit}, offset: #{offset}"
         airlines = Airline.to_airport(key: [destination_airport, limit, offset])
                           .pluck(:callsign, :country, :iata, :icao, :name)
 

app/models/airline.rb

@@ -9,7 +9,6 @@ class Airline < CouchbaseOrm::Base
   attribute :iata, :string
   attribute :icao, :string
   attribute :country, :string
-  # attribute :destinationAirportCode, :string
 
   validates :name, presence: true
   validates :callsign, presence: true
@@ -18,8 +17,15 @@ class Airline < CouchbaseOrm::Base
   validates :country, presence: true
 
   # Custom N1QL query to list airlines by country with pagination
-  n1ql :list_by_country, query_fn: proc { |bucket, values, options|
-    cluster.query("SELECT raw meta().id FROM `#{bucket.name}` WHERE type = 'airline' AND country = #{quote(values[0])} LIMIT #{values[1]} OFFSET #{values[2]}", options)
+  n1ql :list_by_country_or_all, query_fn: proc { |bucket, values, options|
+    if values[0].present?
+      country = quote(values[0])
+      query = "SELECT raw meta().id FROM `#{bucket.name}` WHERE type = 'airline' AND country = #{country}"
+    else
+      query = "SELECT raw meta().id FROM `#{bucket.name}` WHERE type = 'airline'"
+    end
+    query += " LIMIT #{values[1]} OFFSET #{values[2]}"
+    cluster.query(query, options)
   }
 
   n1ql :to_airport, query_fn: proc { |bucket, values, options|