Add limit metric to list type

Also update of documentation and schema

doc/api/graphql/reference/gitlab_schema.graphql

@@ -340,6 +340,11 @@ type BoardList {
   """
   label: Label
 
+  """
+  The current limit metric for the list
+  """
+  limitMetric: ListLimitMetric
+
   """
   Type of the list
   """
@@ -4619,6 +4624,15 @@ type LabelEdge {
   node: Label
 }
 
+"""
+List limit metric setting
+"""
+enum ListLimitMetric {
+  all_metrics
+  issue_count
+  issue_weights
+}
+
 """
 Autogenerated input type of MarkAsSpamSnippet
 """

doc/api/graphql/reference/gitlab_schema.json

@@ -1036,6 +1036,20 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "limitMetric",
+              "description": "The current limit metric for the list",
+              "args": [
+
+              ],
+              "type": {
+                "kind": "ENUM",
+                "name": "ListLimitMetric",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "listType",
               "description": "Type of the list",
@@ -13171,6 +13185,35 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "ENUM",
+          "name": "ListLimitMetric",
+          "description": "List limit metric setting",
+          "fields": null,
+          "inputFields": null,
+          "interfaces": null,
+          "enumValues": [
+            {
+              "name": "all_metrics",
+              "description": null,
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "issue_count",
+              "description": null,
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "issue_weights",
+              "description": null,
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "possibleTypes": null
+        },
         {
           "kind": "INPUT_OBJECT",
           "name": "MarkAsSpamSnippetInput",

doc/api/graphql/reference/index.md

@@ -89,6 +89,7 @@ Represents a list for an issue board
 | `collapsed` | Boolean | Indicates if list is collapsed for this user |
 | `id` | ID! | ID (global ID) of the list |
 | `label` | Label | Label of the list |
+| `limitMetric` | ListLimitMetric | The current limit metric for the list |
 | `listType` | String! | Type of the list |
 | `maxIssueCount` | Int | Maximum number of issues in the list |
 | `maxIssueWeight` | Int | Maximum weight of issues in the list |

ee/app/graphql/ee/types/board_list_type.rb

@@ -14,6 +14,8 @@ module EE
               description: 'Maximum weight of issues in the list'
         field :assignee, ::Types::UserType, null: true,
               description: 'Assignee in the list'
+        field :limit_metric, ::EE::Types::ListLimitMetricEnum, null: true,
+              description: 'The current limit metric for the list'
 
         def milestone
           ::Gitlab::Graphql::Loaders::BatchModelLoader.new(::Milestone, object.milestone_id).find

ee/app/graphql/ee/types/list_limit_metric_enum.rb

+# frozen_string_literal: true
+
+module EE
+  module Types
+    class ListLimitMetricEnum < ::Types::BaseEnum
+      graphql_name 'ListLimitMetric'
+      description 'List limit metric setting'
+
+      value 'all_metrics'
+      value 'issue_count'
+      value 'issue_weights'
+    end
+  end
+end

ee/changelogs/unreleased/add-limit-metric-to-board-list-type-pd.yml

+---
+title: Add limit metric to list type
+merge_request: 30028
+author:
+type: added

ee/spec/requests/api/graphql/boards/board_lists_query_spec.rb

@@ -102,6 +102,25 @@ describe 'get board lists' do
           end
         end
       end
+
+      describe 'limit metric settings' do
+        let(:limit_metric_params) { { limit_metric: 'issue_count', max_issue_count: 10, max_issue_weight: 4 } }
+        let!(:list_with_limit_metrics) { create(:list, board: board, **limit_metric_params) }
+
+        before do
+          post_graphql(query, current_user: user)
+        end
+
+        it 'returns the expected limit metric settings' do
+          lists = grab_list_data(response.body).map { |item| item['node'] }
+
+          list = lists.find { |l| l['id'] == list_with_limit_metrics.to_global_id.to_s }
+
+          expect(list['limitMetric']).to eq('issue_count')
+          expect(list['maxIssueCount']).to eq(10)
+          expect(list['maxIssueWeight']).to eq(4)
+        end
+      end
     end
   end