Entity Framework migrations: can't convert a property to a NotMapped runtime getter

Enable AutoMigrations as well as other migrations in Entity Framework.

A configuration that has the AutomaticMigrationsEnabled property set to true in the constructor is required. Something like this ought to be useful:... Database.SetInitializer(new MigrateDatabaseToLatestVersion<MyContext, MyConfiguration>()); ...with MyConfiguration looking like this:... public class MyConfiguration : Core.Migrations.Configuration ...

Entity Framework - Migrations - Code First - Seeding per Migration

When I wish to use a migration to enter fixed data, I call the migration's Up() method to add the inserts....Sql("Insert ...")... . See the remark at the bottom of the page: ...putting in fixed data...By using the AddOrUpdate overload, which accepts an identifier expression indicating the natural key (see ...this response... and ...in this blog pos...

Entity Framework will only set related entity property to "null" if I first get the property

Edit... This appears to be the case for ...any... Entity property that makes a direct connection to another entity. To put it another way, in the example below, the information that...Bar... overrides It seems like equality is unimportant....Let's say I have the upcoming classes:...public class Foo { public int? Id { get; set; } public vir...

entity framework property can't be set to string, has to be nullable int

The 'EmpGipNumber' property on 'Employee' could not be set to a 'System.String' value. You must set this property to a non-null value of type 'System.Int32'....I'm receiving the following problem, and the EmpGipNumber attribute of my Employee Model is declared as follows:...public virtual int? EmpGipNumber {get;set;} ...Why is it complaining whe...

Entity Framework 6 NotMapped attributes

Is it possible to manually add ICollections that have been [NotMapped] to the model using the fluentAPI in a DbContext? I am aware of how to use the fluentAPI to manually ignore properties....modelBuilder.Entity<MyEntity>().Ignore(e => e.MyChildCollection); ...But can the property be "brought back" into the model if it was defined with the [NotMapp...

Entity Framework Migrations can't drop table because of foreign key constraint

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Entity Framework 6 Getter Only Property Influencing Entity Relationships

Entity Framework's method for determining entity associations is giving me conceptual trouble. Although I have found a solution to my problem, I cannot understand how it works....I have the following entities from the ...Mathematics Class Library... here in condensed form....For simplicity and to keep the attention on the query, line class with hid...

Can't enable migrations for Entity Framework on VS 2017 .NET Core

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Entity Framework Core can't resolve inverse properties even with annotation

Because your data annotations are entirely legitimate, there is nothing to comprehend in this situation....The root of the problem is a simpler one: a regression defect in EF Core 2.0 that is being monitored by open issue ...#9180 Metadata: When using KeyAttribute on PK, InverseProperty cannot resolve ambiguity.... in the EFC issue tracker and slat...

Entity Framework How to fill NotMapped Property that need a join?

I have a table for PostInfo and one for LikeInfo. PostInfo has a list of LikeInfo (for post likes). "LikeCount" is a NotMapped attribute in the PostInfo database. I want to choose a list of PostInfoes, link it to the LikeInfo table, calculate the number of LikeInfoes per post, and then populate the LikeCount attribute with that number....Here is my...