Fix count of required approvals displayed on MR edit form

app/views/shared/issuable/_approvals.html.haml

@@ -4,16 +4,14 @@
 - return unless issuable.is_a?(MergeRequest)
 - return unless issuable.requires_approve?
 
-- approvals_required = issuable.target_project.approvals_before_merge
-
 .form-group
   = form.label :approvals_before_merge, class: 'control-label' do
     Approvals required
   .col-sm-10
-    = form.number_field :approvals_before_merge, class: 'form-control', value: approvals_required
+    = form.number_field :approvals_before_merge, class: 'form-control', value: issuable.approvals_required
     .help-block
       Number of users who need to approve this merge request before it can be accepted.
-      If this isn't greater than the project default (#{pluralize(approvals_required, 'user')}),
+      If this isn't greater than the project default (#{pluralize(issuable.target_project.approvals_before_merge, 'user')}),
       then it will be ignored and the project default will be used.
 .form-group
   = form.label :approver_ids, class: 'control-label' do

changelogs/unreleased-ee/1078_approval_counts_edit_fix.yml

+---
+title: Fix count of required approvals displayed on MR edit form
+merge_request: 1082
+author:

spec/features/merge_requests/approvals_spec.rb

@@ -153,6 +153,36 @@ feature 'Merge request approvals', js: true, feature: true do
         find('.approvals-components')
         expect(page).to have_content("Requires 1 more approval (from #{approver.name})")
       end
+
+      it 'allows changing approvals number' do
+        create_list :approver, 3, target: project
+
+        visit namespace_project_merge_request_path(project.namespace, project, merge_request)
+
+        # project setting in the beginning on the show MR page
+        find('.approvals-components')
+        expect(page).to have_content("Requires 1 more approval")
+
+        find('.merge-request').click_on 'Edit'
+
+        # project setting in the beginning on the edit MR page
+        expect(find('#merge_request_approvals_before_merge').value).to eq('1')
+        expect(find('#merge_request_approvals_before_merge ~ .help-block')).to have_content('1 user')
+
+        fill_in 'merge_request_approvals_before_merge', with: '3'
+
+        click_on('Save changes')
+
+        # new MR setting on the show MR page
+        find('.approvals-components')
+        expect(page).to have_content("Requires 3 more approvals")
+
+        find('.merge-request').click_on 'Edit'
+
+        # new MR setting on the edit MR page
+        expect(find('#merge_request_approvals_before_merge').value).to eq('3')
+        expect(find('#merge_request_approvals_before_merge ~ .help-block')).to have_content('1 user')
+      end
     end
   end