Add assignee usernames

Add GraphQL resolver property
for assignee usernames as
a array for filtering

app/graphql/resolvers/concerns/issue_resolver_arguments.rb

@@ -24,6 +24,9 @@ module IssueResolverArguments
     argument :assignee_username, GraphQL::STRING_TYPE,
               required: false,
               description: 'Username of a user assigned to the issue'
+    argument :assignee_usernames, [GraphQL::STRING_TYPE],
+              required: false,
+              description: 'Usernames of users assigned to the issue'
     argument :assignee_id, GraphQL::STRING_TYPE,
               required: false,
               description: 'ID of a user assigned to the issues, "none" and "any" values supported'

changelogs/unreleased/254903-add-multiple-assignee-filter-graphql.yml

+---
+title: Add assignee usernames to issue resolver
+merge_request: 43294
+author:
+type: changed

doc/api/graphql/reference/gitlab_schema.graphql

@@ -7363,6 +7363,11 @@ type Group {
     """
     assigneeUsername: String
 
+    """
+    Usernames of users assigned to the issue
+    """
+    assigneeUsernames: [String!]
+
     """
     Username of the author of the issue
     """
@@ -12930,6 +12935,11 @@ type Project {
     """
     assigneeUsername: String
 
+    """
+    Usernames of users assigned to the issue
+    """
+    assigneeUsernames: [String!]
+
     """
     Username of the author of the issue
     """
@@ -13025,6 +13035,11 @@ type Project {
     """
     assigneeUsername: String
 
+    """
+    Usernames of users assigned to the issue
+    """
+    assigneeUsernames: [String!]
+
     """
     Username of the author of the issue
     """
@@ -13110,6 +13125,11 @@ type Project {
     """
     assigneeUsername: String
 
+    """
+    Usernames of users assigned to the issue
+    """
+    assigneeUsernames: [String!]
+
     """
     Username of the author of the issue
     """

doc/api/graphql/reference/gitlab_schema.json

@@ -20370,6 +20370,24 @@
                   },
                   "defaultValue": null
                 },
+                {
+                  "name": "assigneeUsernames",
+                  "description": "Usernames of users assigned to the issue",
+                  "type": {
+                    "kind": "LIST",
+                    "name": null,
+                    "ofType": {
+                      "kind": "NON_NULL",
+                      "name": null,
+                      "ofType": {
+                        "kind": "SCALAR",
+                        "name": "String",
+                        "ofType": null
+                      }
+                    }
+                  },
+                  "defaultValue": null
+                },
                 {
                   "name": "assigneeId",
                   "description": "ID of a user assigned to the issues, \"none\" and \"any\" values supported",
@@ -38127,6 +38145,24 @@
                   },
                   "defaultValue": null
                 },
+                {
+                  "name": "assigneeUsernames",
+                  "description": "Usernames of users assigned to the issue",
+                  "type": {
+                    "kind": "LIST",
+                    "name": null,
+                    "ofType": {
+                      "kind": "NON_NULL",
+                      "name": null,
+                      "ofType": {
+                        "kind": "SCALAR",
+                        "name": "String",
+                        "ofType": null
+                      }
+                    }
+                  },
+                  "defaultValue": null
+                },
                 {
                   "name": "assigneeId",
                   "description": "ID of a user assigned to the issues, \"none\" and \"any\" values supported",
@@ -38348,6 +38384,24 @@
                   },
                   "defaultValue": null
                 },
+                {
+                  "name": "assigneeUsernames",
+                  "description": "Usernames of users assigned to the issue",
+                  "type": {
+                    "kind": "LIST",
+                    "name": null,
+                    "ofType": {
+                      "kind": "NON_NULL",
+                      "name": null,
+                      "ofType": {
+                        "kind": "SCALAR",
+                        "name": "String",
+                        "ofType": null
+                      }
+                    }
+                  },
+                  "defaultValue": null
+                },
                 {
                   "name": "assigneeId",
                   "description": "ID of a user assigned to the issues, \"none\" and \"any\" values supported",
@@ -38535,6 +38589,24 @@
                   },
                   "defaultValue": null
                 },
+                {
+                  "name": "assigneeUsernames",
+                  "description": "Usernames of users assigned to the issue",
+                  "type": {
+                    "kind": "LIST",
+                    "name": null,
+                    "ofType": {
+                      "kind": "NON_NULL",
+                      "name": null,
+                      "ofType": {
+                        "kind": "SCALAR",
+                        "name": "String",
+                        "ofType": null
+                      }
+                    }
+                  },
+                  "defaultValue": null
+                },
                 {
                   "name": "assigneeId",
                   "description": "ID of a user assigned to the issues, \"none\" and \"any\" values supported",

spec/graphql/resolvers/issues_resolver_spec.rb

@@ -46,6 +46,13 @@ RSpec.describe Resolvers::IssuesResolver do
         expect(resolve_issues(assignee_username: assignee.username)).to contain_exactly(issue2)
       end
 
+      it 'filters by two assignees' do
+        assignee2 = create(:user)
+        issue2.update!(assignees: [assignee, assignee2])
+
+        expect(resolve_issues(assignee_id: [assignee.id, assignee2.id])).to contain_exactly(issue2)
+      end
+
       it 'filters by assignee_id' do
         expect(resolve_issues(assignee_id: assignee.id)).to contain_exactly(issue2)
       end