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POEntity Framework Finding Entity via Foreign Keys
 

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  1. POEntity Framework Finding Entity via Foreign Keys
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    <p>I'm assuming this is bread &amp; butter for most..</p> <p>I have Roles, Permissions, and a RolePermissions entity to model many-to-many relationship.</p> <pre><code>public class RolePermission { [Key] public int ID { get; set; } //[Key, ForeignKey("Role"), Column(Order = 0)] public int RoleID { get; set; } //[Key, ForeignKey("Permission"), Column(Order = 1)] public int PermissionID { get; set; } //Navigational Properties public virtual Role role { get; set; } public virtual Permission permission { get; set; } } </code></pre> <p>I have an ActionResult to remove a given RolePermission, based on the RoleID and PermissionId that are passed in.</p> <pre><code>public ActionResult Remove(int Roleid, int Permissionid) { RolePermission rolepermission = db.RolePermissions .Include(p =&gt; p.PermissionID == Permissionid) .SingleOrDefault(p =&gt; p.RoleID == Roleid); db.RolePermissions.Remove(rolepermission); db.SaveChanges(); return RedirectToAction("Index"); } </code></pre> <p>The above RolePermission rolepermission.. statement fails with </p> <pre><code>The Include path expression must refer to a navigation property defined on the type. Use dotted paths for reference navigation properties and the Select operator for collection navigation properties. Parameter name: path </code></pre> <p>.. which I'm not suprised, as it has one hell of a code smell to start with.</p> <p>What I'm after is the equivalent of</p> <pre><code>Delete from RolePermission Where RoleID = roleid AND PermissionID = permissionid </code></pre> <p>Any guidance? Many thanks</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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