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MVC two joing table with link querry order by

I have this controller that return a grid but I would like to make some modification so my search result are order by location.

I have a table Master List that contain LastName, FirstName, and others fields and has one foreign key that is LocationID that is related to a Table phoneList Location and its primary key is ID.

My current controller work and return a result set:
var masterLists = db.MasterLists.Include(m => m.PhoneListLocation);

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But when I made some modification bellow  I get an error:

     var masterLists = from r in db.MasterLists.Include(m => m.PhoneListLocation)
                              orderby r.PhoneListLocation.ID
                              select r.PhoneListLocation;
                              




            return View(masterLists.ToList());       

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The model item passed into the dictionary is of type 'System.Collections.Generic.List`1[PhoneListTest.Models.PhoneListLocation]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[PhoneListTest.Models.MasterList]'.
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yguyon28
Asked:
yguyon28
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1 Solution
 
Fernando SotoRetiredCommented:
Hi yguyon28;

The two queries are returning different data types. The first is returning a collection of MasterLists while the modified query that does not work returns collection of PhoneListLocation. While I do not work with Web applications I believe that the View is not expecting the PhoneListLocation data type.

What will be needed in the View?
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yguyon28Author Commented:
Well this controller work

var masterLists = db.MasterLists.Include(m => m.PhoneListLocation);

but I'm trying to modified it so I can have an orderby from the location in the phoneListLocation...
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Fernando SotoRetiredCommented:
What is the relationship between MasterLists and PhoneListLocation? Is it a One to One, One to Many?
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it_saigeDeveloperCommented:
I think your hangup may be here:
var masterLists = (from r in db.MasterLists.Include(m => m.PhoneListLocation)
		   orderby r.PhoneListLocation.ID
		   select r.PhoneListLocation);
// Not this - return View(masterLists.ToList());
// Use this instead:
return View(masterLists);

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masterLists should already be a 'System.Collections.Generic.IEnumerable`1[PhoneListTest.Models.MasterList]'.

-saige-
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yguyon28Author Commented:
But I get this error when I run the code....

Server Error in '/' Application.

The model item passed into the dictionary is of type 'System.Data.Entity.Infrastructure.DbQuery`1[WebApplicationCodeFirstPhoneList.Models.PhoneListLocation]', but this dictionary requires a model item of type 'System.Collections.Generic.IEnumerable`1[WebApplicationCodeFirstPhoneList.Models.MasterList]'.
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yguyon28Author Commented:
the relation is one to many
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it_saigeDeveloperCommented:
Is your View method doing any sort of conversion?  What does the view method take as a parameter?

-saige-
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yguyon28Author Commented:
No no conversion

@model IEnumerable<WebApplicationCodeFirstPhoneList.Models.MasterList>

@{
    ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.PhoneListLocation.Location)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.LastName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.FirstName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Department)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.ExtensionInternal)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.ExtensionDirectDial)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.NumberMobile)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.NumberHome)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.NumberTextMessage)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.NumberOther)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Terminated)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Shift)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.Notes)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.NameGrouping)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.LastUpdatedDT)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.PhoneListLocation.Location)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.LastName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.FirstName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Department)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.ExtensionInternal)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.ExtensionDirectDial)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.NumberMobile)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.NumberHome)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.NumberTextMessage)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.NumberOther)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Terminated)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Shift)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.Notes)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.NameGrouping)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.LastUpdatedDT)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new { id=item.RecordID }) |
            @Html.ActionLink("Details", "Details", new { id=item.RecordID }) |
            @Html.ActionLink("Delete", "Delete", new { id=item.RecordID })
        </td>
    </tr>
}

</table>

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Fernando SotoRetiredCommented:
Ordering of the PhoneListLocation collection which is part of the Include of the MasterLists entity can not be done in the Linq query, it will only return it in order that it has it in.  If you will not be updating the entities in the data context you can order them when they are materialize on the local system. Something like this should work.

var masterLists = db.MasterLists.Include(m => m.PhoneListLocation);

foreach( var m in masterLists )
{
    List<Order> pl = m.PhoneListLocation.OrderBy(p => p.ID).ToList();
     m.PhoneListLocation = null;
     m.Orders = pl;
}

return View(masterLists)

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;
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