Add filter 'by_postal'

CHANGELOG.md

@@ -14,6 +14,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Authorization
 - Brewery update suggestions feature
 
+## [0.4.2] - 2019-12-28
+
+### Added
+
+- Breweries filtering by postal code: 'by_postal' 
+
 ## [0.4.1] - 2019-03-07
 
 ### Fixed

app/controllers/breweries_controller.rb

@@ -17,6 +17,8 @@ class BreweriesController < ApplicationController
   has_scope :by_tag, only: :index
   # FILTER: /breweries?by_tags=dog-friendly,patio
   has_scope :by_tags, only: :index
+  # FILTER /breweries?by_postal=44107
+  has_scope :by_postal, only: :index
 
   # GET /breweries
   def index

app/models/brewery.rb

@@ -20,6 +20,8 @@ class Brewery < ApplicationRecord
   scope :by_type, ->(type) { where('lower(brewery_type) = ?', type.downcase) }
   scope :by_tag, ->(tag) { tagged_with(tag.downcase) }
   scope :by_tags, ->(tags) { tagged_with(tags.downcase.split(',')) }
+  scope :by_postal, ->(postal) { where('postal_code LIKE ?', "#{postal}%") } 
+
 
   def address
     [street, city, state, country].join(', ')

spec/requests/breweries_spec.rb

@@ -163,6 +163,30 @@
       end
     end
 
+    context "when postal param is passed" do
+      before do
+        create_list(:brewery, 5)
+        create_list(:brewery, 3, postal_code: "44107")
+        create_list(:brewery, 2, postal_code: "44107-5555")
+        create_list(:brewery, 1, postal_code: "WC2N 5DU")
+      end
+
+      it "returns a filtered list of breweries for US postal codes" do
+        get "/breweries", params: { by_postal: "44107" }
+        expect(json.size).to eq(5)
+      end
+
+      it "returns a filtered list of breweries for US postal code ZIP+4" do
+        get "/breweries", params: { by_postal: "44107-5555" }
+        expect(json.size).to eq(2)
+      end
+
+      it "returns a filtered list of breweries for international postal codes" do
+        get "/breweries", params: { by_postal: "WC2N" }
+        expect(json.size).to eq(1)
+      end
+    end
+
     context "when sort param is passed" do
       before do
         create(