Rake task import csv jobs, change encoding mysql

config/database.yml

 default: &default
   adapter: mysql2
-  encoding: utf8
+  encoding: utf8mb4
   pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
   username: dev
   password: dev

db/schema.rb

@@ -12,7 +12,7 @@
 
 ActiveRecord::Schema.define(version: 2020_04_08_025325) do
 
-  create_table "applies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "applies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "user_id", null: false
     t.bigint "job_id", null: false
     t.datetime "created_at", precision: 6, null: false
@@ -21,20 +21,20 @@ ActiveRecord::Schema.define(version: 2020_04_08_025325) do
     t.index ["user_id"], name: "index_applies_on_user_id"
   end
 
-  create_table "cities", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "cities", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "title"
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
   end
 
-  create_table "cities_jobs", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "cities_jobs", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "city_id", null: false
     t.bigint "job_id", null: false
     t.index ["city_id", "job_id"], name: "index_cities_jobs_on_city_id_and_job_id"
     t.index ["job_id", "city_id"], name: "index_cities_jobs_on_job_id_and_city_id"
   end
 
-  create_table "companies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "companies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "title"
     t.string "address"
     t.string "logo"
@@ -43,7 +43,7 @@ ActiveRecord::Schema.define(version: 2020_04_08_025325) do
     t.datetime "updated_at", precision: 6, null: false
   end
 
-  create_table "favorites", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "favorites", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "user_id", null: false
     t.bigint "job_id", null: false
     t.datetime "created_at", precision: 6, null: false
@@ -52,20 +52,20 @@ ActiveRecord::Schema.define(version: 2020_04_08_025325) do
     t.index ["user_id"], name: "index_favorites_on_user_id"
   end
 
-  create_table "industries", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "industries", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "title"
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
   end
 
-  create_table "industries_jobs", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "industries_jobs", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "industry_id", null: false
     t.bigint "job_id", null: false
     t.index ["industry_id", "job_id"], name: "index_industries_jobs_on_industry_id_and_job_id"
     t.index ["job_id", "industry_id"], name: "index_industries_jobs_on_job_id_and_industry_id"
   end
 
-  create_table "jobs", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "jobs", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "title"
     t.string "updated_date_job"
     t.string "level"
@@ -79,7 +79,7 @@ ActiveRecord::Schema.define(version: 2020_04_08_025325) do
     t.index ["company_id"], name: "index_jobs_on_company_id"
   end
 
-  create_table "users", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+  create_table "users", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "email", default: "", null: false
     t.string "encrypted_password", default: "", null: false
     t.string "reset_password_token"

lib/tasks/import_csv.rake

+require 'csv'
+
+namespace :import do
+  desc "TODO"
+
+  task csv: :environment do
+    
+
+    csv_text = File.read('jobs.csv')
+    csv = CSV.parse(csv_text, :headers => true)
+    csv.each do |row|
+      # Job attributes
+      job_attributes = {
+        title: row[9],
+        level: row[8],
+        salary: row[11],
+        job_description: row[7],
+        company_id: nil,
+      }
+      # Company attributes
+      company_attributes = {
+        title: row[5],
+        address: row[2],
+        logo: "https://via.placeholder.com/66x38?text=Logo",
+        description: row[14]
+      }
+      # Check exist or create company
+      job_attributes[:company_id] = check_exist_or_create_company(company_attributes)
+      # Create job
+      job = check_exist_or_create_job(job_attributes)
+      # Industry
+      industry = check_exist_or_create_industry(row[1])
+      # Industry job
+      job.industries << industry
+      # City
+      city = check_exist_or_create_city(row[16].gsub('["',"").gsub('"]',""))
+      # City job
+      job.cities << city
+    end
+  end
+  
+  def check_exist_or_create_company(company_attributes)
+    find_company = Company.find_or_create_by(company_attributes)
+    return find_company.id
+  end
+
+  def check_exist_or_create_city(city_title)
+    find_city = City.find_or_create_by(title: city_title)
+    return find_city
+  end
+
+  def check_exist_or_create_industry(industry_title)
+    find_industry = Industry.find_or_create_by(title: industry_title)
+    return find_industry
+  end
+
+  def check_exist_or_create_job(job_attributes)
+    job = Job.find_or_create_by(job_attributes)
+    return job
+  end
+end