Folders#create action

app/models/device.rb

@@ -34,6 +34,7 @@ class Device < ApplicationRecord
   has_many :in_use_tools
   has_many :in_use_points
   has_many :users
+  has_many :folders
 
   validates_presence_of :name
   validates :timezone, inclusion: {

app/models/folder.rb

@@ -0,0 +1,9 @@
+class Folder < ApplicationRecord
+  belongs_to :device
+  belongs_to :device, dependent: :destroy
+
+  has_many :sub_folders, class_name: "Folder",
+                          foreign_key: "parent_id"
+
+  belongs_to :parent, class_name: "Folder", optional: true
+end

app/mutations/folders/create.rb

@@ -0,0 +1,37 @@
+module Folders
+  class Create < Mutations::Command
+    required do
+      model :device
+      string :color
+      string :name
+    end
+
+    optional do
+      integer :parent_id
+    end
+
+    def validate
+      validate_parent_id
+    end
+
+    def execute
+      Folder.create!(update_params)
+    end
+
+    private
+
+    def update_params
+      { parent: parent }.merge(inputs.except(:parent_id))
+    end
+
+    def parent
+      @parent ||= device.folders.find(parent_id)
+    end
+
+    def validate_parent_id
+      unless parent
+        add_error :folder_id, :folder_id_invalid, "Folder ID is not valid"
+      end
+    end
+  end
+end

db/migrate/20191203163621_add_folder_columns.rb

@@ -1,14 +1,20 @@
 class AddFolderColumns < ActiveRecord::Migration[6.0]
   def change
     create_table :folders do |t|
-      t.references :device
+      t.references :device, null: false
       t.timestamps
       # https://twitter.com/wesbos/status/719678818831757313?lang=en
-      t.string :color, limit: 20
-      t.string :name, limit: 40
+      t.string :color, limit: 20, null: false
+      t.string :name, limit: 40, null: false
     end
-    add_column :folders, :parent_id, :integer, null: true, index: true
-    add_foreign_key :folders, :folders, column: :parent_id
+    add_column :folders,
+               :parent_id,
+               :integer,
+               null: true,
+               index: true
+    add_foreign_key :folders,
+                    :folders,
+                    column: :parent_id
 
     add_reference :sequences, :folder, index: true
   end

db/structure.sql

@@ -669,11 +669,11 @@ ALTER SEQUENCE public.firmware_configs_id_seq OWNED BY public.firmware_configs.i
 
 CREATE TABLE public.folders (
     id bigint NOT NULL,
-    device_id bigint,
+    device_id bigint NOT NULL,
     created_at timestamp(6) without time zone NOT NULL,
     updated_at timestamp(6) without time zone NOT NULL,
-    color character varying(20),
-    name character varying(40),
+    color character varying(20) NOT NULL,
+    name character varying(40) NOT NULL,
     parent_id integer
 );
 

spec/controllers/api/folders/folders_create_spec.rb

@@ -0,0 +1,26 @@
+require "spec_helper"
+
+describe Api::FoldersController do
+  let(:user) { FactoryBot.create(:user) }
+  include Devise::Test::ControllerHelpers
+
+  it "creates a webcam feed" do
+    sign_in user
+    parent = Folder.create!(name: "parent", color: "red", device: user.device)
+    input = {
+      parent_id: parent.id,
+      color: "blue",
+      name: "child"
+    }
+    b4 = Folder.count
+    expect(user.device.folders.count).to eq(1)
+    post :create, body: input.to_json
+    expect(response.status).to eq(200)
+    expect(Folder.count).to be > b4
+    expect(user.device.folders.count).to eq(2)
+    input.keys.map do |key|
+      binding.pry if json[key] != input[key]
+      expect(input[key]).to eq(json[key])
+    end
+  end
+end