Add SupplierCategory

This allows the categorization of suppliers. For a better reporting
it is necessary to split the expenses of the invoices.
E.g. we want to be able to generate independent sums of general cost
like the rent or electricity and the cost of the bought articles.

app/controllers/suppliers_controller.rb

@@ -27,6 +27,7 @@ class SuppliersController < ApplicationController
 
   def create
     @supplier = Supplier.new(supplier_params)
+    @supplier.supplier_category ||= SupplierCategory.first
     if @supplier.save
       flash[:notice] = I18n.t('suppliers.create.notice')
       redirect_to suppliers_path
@@ -70,7 +71,7 @@ class SuppliersController < ApplicationController
     params
       .require(:supplier)
       .permit(:name, :address, :phone, :phone2, :fax, :email, :url, :contact_person, :customer_number,
-              :iban, :custom_fields, :delivery_days, :order_howto, :note,
+              :iban, :custom_fields, :delivery_days, :order_howto, :note, :supplier_category_id,
               :shared_supplier_id, :min_order_quantity, :shared_sync_method)
   end
 

app/models/financial_transaction_class.rb

@@ -1,5 +1,6 @@
 class FinancialTransactionClass < ApplicationRecord
   has_many :financial_transaction_types, dependent: :destroy
+  has_many :supplier_category, dependent: :restrict_with_exception
 
   validates :name, presence: true
   validates_uniqueness_of :name

app/models/supplier.rb

@@ -8,6 +8,7 @@ class Supplier < ApplicationRecord
   has_many :orders
   has_many :deliveries
   has_many :invoices
+  belongs_to :supplier_category
   belongs_to :shared_supplier  # for the sharedLists-App
 
   validates :name, :presence => true, :length => { :in => 4..30 }

app/models/supplier_category.rb

@@ -0,0 +1,19 @@
+class SupplierCategory < ActiveRecord::Base
+
+  belongs_to :financial_transaction_class
+  has_many :suppliers
+
+  normalize_attributes :name, :description
+
+  validates :name, presence: true, uniqueness: true, length: { minimum: 2 }
+
+  before_destroy :check_for_associated_suppliers
+
+  protected
+
+  # Deny deleting the category when there are associated suppliers.
+  def check_for_associated_suppliers
+    raise I18n.t('activerecord.errors.has_many_left', collection: Supplier.model_name.human) if suppliers.undeleted.any?
+  end
+
+end

app/views/suppliers/_form.html.haml

@@ -12,6 +12,9 @@
   = f.input :url
   = f.input :contact_person
   = f.input :customer_number
+  - supplier_categories = SupplierCategory.order(:name)
+  - if supplier_categories.count > 1
+    = f.association :supplier_category, collection: supplier_categories, include_blank: false
   - if FoodsoftConfig[:use_iban]
     = f.input :iban
   = f.input :delivery_days

app/views/suppliers/show.html.haml

@@ -29,6 +29,9 @@
       %dd= @supplier.contact_person
       %dt= heading_helper(Supplier, :customer_number) + ':'
       %dd= @supplier.customer_number
+      - if SupplierCategory.count > 1
+        %dt= heading_helper(Supplier, :supplier_category) + ':'
+        %dd= @supplier.supplier_category.try(:name)
       - if FoodsoftConfig[:use_iban]
         %dt= heading_helper(Supplier, :iban) + ':'
         %dd= @supplier.iban