Issue export CSV includes weight

doc/user/project/issues/csv_export.md

@@ -39,6 +39,8 @@ You will be asked to confirm the number of issues and email address for the expo
 ## Format
 
 > **Time Estimate** and **Time Spent** columns were [introduced](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/2627) in GitLab Starter 10.0.
+>
+> The **Weight** column was [introduced](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5300) in GitLab Starter 10.8.
 
 Data will be encoded with a comma as the column delimiter, with `"` used to quote fields if needed, and newlines to separate rows. The first row will be the headers, which are listed in the following table along with a description of the values:
 
@@ -59,6 +61,7 @@ Data will be encoded with a comma as the column delimiter, with `"` used to quot
 | Created At (UTC) | Formated as `YYYY-MM-DD HH:MM:SS` |
 | Updated At (UTC) | Formated as `YYYY-MM-DD HH:MM:SS` |
 | Milestone | Title of the issue milestone |
+| Weight | Issue weight |
 | Labels | Title of any labels joined with a `,` |
 | Time Estimate | [Time estimate](../../../workflow/time_tracking.md#estimates) in seconds |
 | Time Spent | [Time spent](../../../workflow/time_tracking.md#time-spent) in seconds |

ee/app/services/issues/export_csv_service.rb

@@ -43,6 +43,7 @@ module Issues
        'Updated At (UTC)' => -> (issue) { issue.updated_at&.to_s(:csv) },
        'Closed At (UTC)' => -> (issue) { issue.closed_at&.to_s(:csv) },
        'Milestone' => -> (issue) { issue.milestone&.title },
+       'Weight' => -> (issue) { issue.weight },
        'Labels' => -> (issue) { @labels[issue.id].sort.join(',').presence },
        'Time Estimate' => ->(issue) { issue.time_estimate.to_s(:csv) },
        'Time Spent' => -> (issue) { issue.timelogs.map(&:time_spent).inject(0, :+)}

ee/changelogs/unreleased/jej-add-weight-to-csv-export.yml

+---
+title: Issues export CSV includes issue weight
+merge_request: 5300
+author:
+type: changed

ee/spec/services/issues/export_csv_service_spec.rb

@@ -41,6 +41,7 @@ describe Issues::ExportCsvService do
                     created_at: DateTime.new(2015, 4, 3, 2, 1, 0),
                     updated_at: DateTime.new(2016, 5, 4, 3, 2, 1),
                     closed_at: DateTime.new(2017, 6, 5, 4, 3, 2),
+                    weight: 4,
                     labels: [feature_label, idea_label],
                     time_estimate: 72000)
       issue.timelogs.create(time_spent: 360, user: user)
@@ -118,6 +119,10 @@ describe Issues::ExportCsvService do
       expect(csv[1]['Closed At (UTC)']).to eq nil
     end
 
+    specify 'weight' do
+      expect(csv[0]['Weight']).to eq '4'
+    end
+
     specify 'time estimate' do
       expect(csv[0]['Time Estimate']).to eq '72000'
       expect(csv[1]['Time Estimate']).to eq '0'