add message model and migration

app/admin/messages.rb

@@ -0,0 +1,22 @@
+ActiveAdmin.register Message do
+  csv do
+    column :title
+    column(:email)
+    column('bODY', humanize_name: false) # preserve case
+  end
+  # See permitted parameters documentation:
+  # https://github.com/activeadmin/activeadmin/blob/master/docs/2-resource-customization.md#setting-up-strong-parameters
+  #
+  # Uncomment all parameters which should be permitted for assignment
+  #
+  permit_params :title, :description, :email, :phone
+  #
+  # or
+  #
+  # permit_params do
+  #   permitted = [:title, :description, :email, :phone]
+  #   permitted << :other if params[:action] == 'create' && current_user.admin?
+  #   permitted
+  # end
+  
+end

app/models/message.rb

@@ -0,0 +1,2 @@
+class Message < ApplicationRecord
+end

db/migrate/20220512140948_create_messages.rb

@@ -0,0 +1,11 @@
+class CreateMessages < ActiveRecord::Migration[6.0]
+  def change
+    create_table :messages do |t|
+      t.string :title
+      t.text :description
+      t.string :email, null: false
+      t.string :phone
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2022_05_12_124755) do
+ActiveRecord::Schema.define(version: 2022_05_12_140948) do
 
   create_table "active_admin_comments", force: :cascade do |t|
     t.string "namespace"
@@ -38,4 +38,13 @@ ActiveRecord::Schema.define(version: 2022_05_12_124755) do
     t.index ["reset_password_token"], name: "index_admin_users_on_reset_password_token", unique: true
   end
 
+  create_table "messages", force: :cascade do |t|
+    t.string "title"
+    t.text "description"
+    t.string "email", null: false
+    t.string "phone"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
 end

db/seeds.rb

@@ -5,5 +5,7 @@
 #
 #   movies = Movie.create([{ name: 'Star Wars' }, { name: 'Lord of the Rings' }])
 #   Character.create(name: 'Luke', movie: movies.first)
-AdminUser.create!(email: 'admin@example.com', password: 'password', password_confirmation: 'password') if Rails.env.development?
-AdminUser.create!(email: 'bijan@example.com', password: '1234567890', password_confirmation: '1234567890') if Rails.env.development?
+if Rails.env.development?
+  AdminUser.create!(email: 'admin@example.com', password: 'password', password_confirmation: 'password')
+  AdminUser.create!(email: 'bijan@example.com', password: '1234567890', password_confirmation: '1234567890')
+end

test/fixtures/messages.yml

@@ -0,0 +1,11 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+# This model initially had no columns defined. If you add columns to the
+# model remove the '{}' from the fixture names and add the columns immediately
+# below each fixture, per the syntax in the comments below
+#
+one: {}
+# column: value
+#
+two: {}
+# column: value

test/models/message_test.rb

@@ -0,0 +1,7 @@
+require 'test_helper'
+
+class MessageTest < ActiveSupport::TestCase
+  # test "the truth" do
+  #   assert true
+  # end
+end