Error in SharePoint hosted app: Add permission level to the list programmatically

Question

I am trying to add permission to the list which I have created in my app. I am trying to give current user some permission to add update delete items from my list. I have used one article from MSDN site. And my code is as bellow:

function execOperation() {
    debugger;
    context = new SP.ClientContext(appweburl);
    var factory =
        new SP.ProxyWebRequestExecutorFactory(
            appweburl
        );
    context.set_webRequestExecutorFactory(factory);
    appContextSite = new SP.AppContextSite(context, appweburl);
    var appContextSite2 = new SP.AppContextSite(context, hostweburl);

    var siteColl = appContextSite2.get_site();
    hostweb = appContextSite2.get_web();
    context.load(hostweb);

    web = appContextSite.get_web();
    context.load(web);
    user = web.get_currentUser();
    context.load(user);
    que_list = web.get_lists().getByTitle("MyList1");
    context.load(que_list);
    que_list.breakRoleInheritance(true, true);

    var permissions = new SP.BasePermissions();
    permissions.set(SP.PermissionKind.viewListItems);
    permissions.set(SP.PermissionKind.addListItems);
    permissions.set(SP.PermissionKind.editListItems);
    permissions.set(SP.PermissionKind.deleteListItems);

    // Create a new role definition.
    var roleDefinitionCreationInfo = new SP.RoleDefinitionCreationInformation();
    roleDefinitionCreationInfo.set_name('Manage List Items');
    roleDefinitionCreationInfo.set_description('Allows a user to manage list items');
    roleDefinitionCreationInfo.set_basePermissions(permissions);
    var roleDefinition = web.get_roleDefinitions().add(roleDefinitionCreationInfo);

    web.breakRoleInheritance(true, false);
    // Create a new RoleDefinitionBindingCollection.
    var newBindings = SP.RoleDefinitionBindingCollection.newObject(context);
    // Add the role to the collection.
    newBindings.add(roleDefinition);

    // Get the RoleAssignmentCollection for the target list.
    var assignments = que_list.get_roleAssignments();
    que_list.breakRoleInheritance(true, true);
    // Add the user to the target list and assign the use to the new RoleDefinitionBindingCollection.
    var roleAssignment = assignments.add(web.get_currentUser(), newBindings);

    context.executeQueryAsync(onSuccess, onFail);
}

I have just copied the code from that article. But when I run my app it give me error :

You cannot customize permission levels in a web site with inherited permission levels

Any suggestions, What am I doing wrong?
Any help will be appreciated...! Thank you in advance...!

Answer 1

I think the problem is in the breakRoleInheritance method,

Replace the below code

web.breakRoleInheritance(true, false);

With

 web.breakRoleInheritance(true, true);

Note:

SPWeb.BreakRoleInheritance method (Boolean, Boolean)

Parameters,

copyRoleAssignments - true to specify role assignments are copied from the parent website to this website; false to specify only the current user is assigned to security roles.

clearSubscopes - true to specify unique role assignments are cleared from child objects and then inherit role assignments from this website; false to specify unique role assignments defined on child objects are left in place.

Reference

Answer 2

web.RoleDefinitions.BreakInheritance(true, true);
web.Update();

if you target the roledefinitions instead of the spweb this will get rid the error message