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The property 'x' is not a navigation property of entity type 'y'


The property 'x' is not a navigation property of entity type 'y'

By : user7454975
Date : November 20 2020, 03:01 PM
fixed the issue. Will look into that further I'm using EF Core with ASP Core 2.0. Using latest Identity framework. I get this exception on page All. , add a ForeignKey attribute
code :
using System.ComponentModel.DataAnnotations.Schema;

...

[ForeignKey("Article")]
public int? ArticleId { get; set; }

[ForeignKey("User")]
public Guid UserId { get; set; }
[ForeignKey("UserId")]
public ApplicationUser User { get; set; }


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Self Tracking Entity - Loading Navigation Property of a Navigation Property

Self Tracking Entity - Loading Navigation Property of a Navigation Property


By : dwilkinson
Date : March 29 2020, 07:55 AM
I hope this helps you . Try this out. It loads the navigation property from the current point in the object graph:
code :
EntityA entityA = ctx.EntityA.Include("EntityB.EntityC").Where(x => x.Id == id).SingleOrDefault();
Entity Framework Navigation property interface type

Entity Framework Navigation property interface type


By : Suraj Sanwal
Date : March 29 2020, 07:55 AM
Does that help There is only one way to solve this - use concrete classes persisted to the database. EF doesn't support any other way. Even using abstract classes will not help you unless you map the whole inheritance tree (don't do that).
If you want property exposing an interface you must offer second non mapped property which will do the conversion from property exposing concrete type internally.
The property is not a navigation property of entity type

The property is not a navigation property of entity type


By : Alexey Palshin
Date : March 29 2020, 07:55 AM
hope this fix your issue I've designed my entities attached in the below diagram. , I've to modify my query to following to fix the issue.
code :
from u in _context.Users
                   from r in _context.Roles
                   from app in _context.Applications
                   from ac in _context.Activities
                   where u.Id == 1
                   select u
The property 'a' is not a navigation property of entity type 'b'. Why not?

The property 'a' is not a navigation property of entity type 'b'. Why not?


By : Alexandr
Date : March 29 2020, 07:55 AM
this one helps. As pointed out in the comments the Include is for the Navigation property only.
Instead of doing .Include(t => t.Identifier.Label) try to do only .Include(t => t.Identifier)
Property 'field' on type 'Microsoft.Dynamics.CRM.entity' is not a navigation property or complex property. Only navigati

Property 'field' on type 'Microsoft.Dynamics.CRM.entity' is not a navigation property or complex property. Only navigati


By : Fath Elus
Date : November 17 2020, 04:01 AM
wish of those help My understanding is that the _[field]_value item will give you the GUID of the associated item immediately.
To use $expand you have to use the schema name, so it should look like:
code :
$expand=biz_buyerlookupid($select=contactid, fullname)
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