title: How to have only one selected row across all details grid in a master detail KendoUI grid?
body: <p>I have a KendoUI grid displaying a list of customers (the master part). Each customer could have a list of users (the detail part) </p>
  
  <p>Html page: </p>
  
  <pre><code>&lt;kendo-grid options="mainGridOptions" k-on-change="onSelectedCustomerChanged({selected:data})"&gt;
  &lt;div k-detail-template&gt;
      &lt;div&gt;
          &lt;div kendo-grid k-options="detailGridOptions(dataItem)" k-on-change="onSelectedUserChanged({selected:data})"&gt;&lt;/div&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>js file:</p>
  
  <pre><code>$scope.mainGridOptions = {
    toolbar: ["excel"],
    columns: [{ field: "Fullname"}, { field: "Country.CountryName"}],
    selectable: "row",
    dataSource: {
        transport: {
            read: function (e) {
                $http.post("Services/Customer.svc/GetCustomers").
                    success(function (data, status, headers, config) {
                        e.success(data.d);
                    }).
                    error(function (data, status, headers, config) {
                        alert('something went wrong');
                        console.log(status);
                      });
              }
          }
      }
  };
  $scope.detailGridOptions = function (dataItem) {
      return {
          selectable: "row",
          dataSource: dataItem.Users,                       
          columns: [{ field: "UserName" },{ field: "Email" },{ field: "FullName" }]
      };
  };
  </code></pre>
  
  <p>my data looks like :</p>
  
  <pre><code>customer 1  France
    user1   user1@domain.tld  user 1
    user2   user2@domain.tld  user 2
    user3   user3@domain.tld  user 3
  customer 2  U.K.
    user4   user4@domain.tld  user 4
    user5   user5@domain.tld  user 5
  </code></pre>
  
  <p>I can click on customer row and user row.</p>
  
  <p>when I click on user 4 the full row is selected.
  If I click on user 2, the user 2's row is selected but the user 4's row remains selected. 
  I would like to have only 1 user selected at a time.</p>
  
  <p>I don't know if it is possible (and how to do that).
  Any help would be appreciated.
  Thank you</p>