[WEB-3787] fix: project joining date (#7127)

* fix: return project joining date

* fix: added project's joining date

* fix: set created_at as read_only_fields

---------

Co-authored-by: gakshita <akshitagoyal1516@gmail.com>

apiserver/plane/app/serializers/project.py

@@ -151,7 +151,8 @@ class ProjectMemberAdminSerializer(BaseSerializer):
 class ProjectMemberRoleSerializer(DynamicBaseSerializer):
     class Meta:
         model = ProjectMember
-        fields = ("id", "role", "member", "project")
+        fields = ("id", "role", "member", "project", "created_at")
+        read_only_fields = ["created_at"]
 
 
 class ProjectMemberInviteSerializer(BaseSerializer):

packages/types/src/project/projects.d.ts

@@ -114,6 +114,7 @@ export interface IProjectMembership {
   id: string;
   member: string;
   role: TUserPermissions;
+  created_at: string;
 }
 
 export interface IProjectBulkAddFormData {

packages/types/src/users.d.ts

@@ -12,6 +12,7 @@ export interface IUserLite {
   id: string;
   is_bot: boolean;
   last_name: string;
+  joining_date?: string;
 }
 export interface IUser extends IUserLite {
   // only for uploading the cover image

web/core/store/member/project-member.store.ts

@@ -127,7 +127,10 @@ export class ProjectMemberStore implements IProjectMemberStore {
     const memberDetails: IProjectMemberDetails = {
       id: projectMember.id,
       role: projectMember.role,
-      member: this.memberRoot?.memberMap?.[projectMember.member],
+      member: {
+        ...this.memberRoot?.memberMap?.[projectMember.member],
+        joining_date: projectMember.created_at,
+      },
     };
     return memberDetails;
   });