Fixes #2793 - CSV-Export contains Tags twice.

lib/core_ext/active_record/calculations/pluck_as_hash.rb

@@ -0,0 +1,35 @@
+require 'active_record/relation/calculations'
+
+module ActiveRecord
+  module Calculations
+    # plucks attributes and create a hash instead of returning an array
+    #
+    # @see ActiveRecord::Calculations#pluck
+    #
+    # @param [<String, Symbol, SqlLiteral>] attributes to fetch
+    #
+    # @return [<Hash<String=>Any>]
+    #
+    # @example
+    #   Ticket.all.pluck_as_hash(:title) # [{title: 'A'}, {title: 'B'}]
+    #   Ticket.all.pluck_as_hash(:title, :owner_id) # [{title: 'A', owner_id: 1}, {title: 'B', owner_id: 2}]
+    def pluck_as_hash(*column_names)
+      column_names.flatten! # flatten args in case array was given
+
+      klass.enforce_raw_sql_whitelist(column_names) # keep up deprection as in #pluck to ensure smooth Rails 6 transition
+
+      pluck(*arel_columns(column_names))
+        .map { |elem| pluck_as_hash_map(column_names, elem) }
+    end
+
+    private
+
+    def pluck_as_hash_map(keys, values)
+      if keys.one?
+        Hash[keys.first, values]
+      else
+        keys.zip(values).to_h
+      end
+    end
+  end
+end

lib/excel_sheet/ticket.rb

@@ -48,23 +48,19 @@ class ExcelSheet::Ticket < ExcelSheet
     header.concat(@additional_attributes_header) if @additional_attributes_header
 
     # ObjectManager attributes
-    objects = ObjectManager::Attribute.where(active:           true,
+    ObjectManager::Attribute
-                                             to_create:        false,
+      .where(
-                                             object_lookup_id: ObjectLookup.lookup(name: 'Ticket').id)
+        active:        true,
-                                      .pluck(:name, :display, :data_type, :data_option)
+        to_create:     false,
-                                      .map { |name, display, data_type, data_option| { name: name, display: display, data_type: data_type, data_option: data_option, width: 20 } }
+        object_lookup: ObjectLookup.lookup(name: 'Ticket')
-    objects.each do |object|
+      )
-      already_exists = false
+      .where.not(
-      header.each do |local_header|
+        name:    header.pluck(:name),
-        next if local_header[:name] != object[:name]
+        display: header.pluck(:display)
-
+      )
-        already_exists = true
+      .pluck_as_hash(:name, :display, :data_type, :data_option)
-        break
+      .each { |elem| elem[:width] = 20 }
-      end
+      .then { |objects| header.concat(objects) }
-      next if already_exists
-
-      header.push object
-    end
 
     header.concat([
                     { display: 'Created At', name: 'created_at', width: 18, data_type: 'datetime' },

spec/lib/core_ext/active_record/calculations/pluck_as_hash_spec.rb

@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe ActiveRecord::Calculations do
+  describe '#pluck_as_hash' do
+    let(:ticket) { create(:ticket) }
+
+    it 'returns array with the hash' do
+      result = Ticket.where(id: ticket.id).pluck_as_hash(:title)
+      expect(result).to eq [{ title: ticket.title }]
+    end
+
+    it 'works given multiple attributes' do
+      result = Ticket.where(id: ticket.id).pluck_as_hash(:title, :id)
+      expect(result).to eq [{ title: ticket.title, id: ticket.id }]
+    end
+
+    it 'works given array' do
+      result = Ticket.where(id: ticket.id).pluck_as_hash(%i[title id])
+      expect(result).to eq [{ title: ticket.title, id: ticket.id }]
+    end
+  end
+end

spec/lib/excel_sheet/ticket_spec.rb

@@ -0,0 +1,29 @@
+require 'rails_helper'
+
+RSpec.describe ExcelSheet::Ticket do
+  let(:ticket)   { create(:ticket) }
+  let(:tag_name) { 'foo' }
+  let(:instance) { described_class.new(title: 'some title', ticket_ids: [ticket.id], timezone: 'Europe/Berlin', locale: 'de-de') }
+
+  before do
+    Tag.tag_add(object: 'Ticket', item: tag_name, o_id: 1, created_by_id: 1)
+  end
+
+  describe '#ticket_header' do
+    it 'has Tags once' do
+      tags_count = instance.ticket_header.count { |elem| elem[:display] == 'Tags' }
+
+      expect(tags_count).to eq 1
+    end
+
+    it 'has 31 column in default configuration' do
+      tags_count = instance.ticket_header.count
+
+      expect(tags_count).to eq 31
+    end
+
+    it 'all elements have width attribute' do
+      expect(instance.ticket_header).to be_all(have_key(:width))
+    end
+  end
+end