Lookup in another list when filtering in a view

Question

Hello,
I need help with a public view for a list. This is my filter now:
<View Name="{F9165834-6860-4EB5-A7FE-D96CE334DF70}" Type="HTML" DisplayName="My group - not assigned" Url="/sites/RomaniaL1SD/Lists/Opened tickets/My group not assigned.aspx" Level="1" BaseViewID="1" ContentTypeID="0x" ImageUrl="/_layouts/15/images/generic.png?rev=23" ><Query><OrderBy><FieldRef Name="Modified" Ascending="FALSE"/><FieldRef Name="Requester" Ascending="FALSE"/></OrderBy><Where><And><Eq><FieldRef Name="Assignment_x0020_group"/><Value Type="Text">EMEIA Romania Service Desk Management Level 1</Value></Eq><IsNull><FieldRef Name="Assignment_x0020_Person"/></IsNull></And></Where></Query><ViewFields><FieldRef Name="ID"/><FieldRef Name="Requester"/><FieldRef Name="Short_x0020_description"/><FieldRef Name="Assignment_x0020_group"/><FieldRef Name="Assignment_x0020_Person"/><FieldRef Name="Ticket_x0020_Status"/><FieldRef Name="Ticket_x0020_Priority"/><FieldRef Name="Attachments"/></ViewFields><RowLimit Paged="TRUE">30</RowLimit><Aggregations Value="Off"/><JSLink>clienttemplates.js</JSLink><XslLink Default="TRUE">main.xsl</XslLink><Toolbar Type="Standard"/></View></XmlDefinition>
So this view displays all the items where the Assignment group is  "EMEIA Romania Service Desk Management Level 1" and the Assignment person "IsNull".
What I need is to modify this, to filter
by the Assignment group taken from another list and where in that list the person is [Me]
--- I have another list with a 1st Person column, and a 2nd column which contains an Assignment group for each person and this is where I want to look ---
Please let me know if this is feasible from SharePoint Designer.
Kind Regards,
Alex

Answer 1

Hi,
Per my understanding, you might want to filter the current list view with values from other list.
Modifying the CAML statement in SharePoint Designer won’t be capable of this requirement cause we will need to query data from other list.
In my opinion, custom code with CAML query would be required to query the “Assignment group” column and the “Assignment person” from the other list, then apply filter
to the current list view.
A possible solution is that you can use JavaScript Client Object Model to do the query job, with the retrieved values, filter the current list view using JavaScript.
The links below about
accessing list items using JavaScript Client Object Model would be helpful:
How to: Create, Update, and Delete List Items Using JavaScript
http://msdn.microsoft.com/en-us/library/office/hh185011(v=office.14).aspx  
Common Programming Tasks in the JavaScript Object Model
http://msdn.microsoft.com/en-us/library/office/hh185015(v=office.14).aspx
About how to filter a list view using query string in URL:
http://sharepointificate.blogspot.jp/2012/12/filtering-listviews-with-url-query.html
Best regards,
Patrick
Patrick Liang
TechNet Community Support