Error 3027: No mapping specified for the following EntitySet/AssociationSet

"The supplied LINQ phrase includes references to queries associated with various contexts," says the error message.

You either need to add the second table to the model of the first context. If this is in multiple databases, you need to do the secondary lookup client-side using a Linq to Objects join.

Entity Framework error - Error 11009: Property ' ' is not mapped

Check the xml file of your model, it's probably still in there somewhere. Try deleting it manually from that XML file, then try to update again. Be sure to take backups though.

Foreign key must be mapped to some AssociationSet or EntitySets participating in a foreign key association on the conceptual side

I am trying to use a one to one (master, detail) relationship in Entity Framework, however, I get this error:...Problem in mapping fragments starting at lines 254, 443:Foreign key constraint 'options_Advanced_FK00' from table options_Advanced (ProductID) to table products (catalogid):: Insufficient mapping: Foreign key must be mapped to some Associ...

Automapper causing error: missing type map configuration or unsupported mapping

See Getting-started ...https://github.com/AutoMapper/AutoMapper/wiki/Getting-started...CreateMap<**TSource, TDestination**>() ...You must add ...Mapper.CreateMap<studentDTO, StudentMaster>(); ...After mapping configuration call...Mapper.AssertConfigurationIsValid();

EF6: Schema specified is not valid; ambiguous mapping

I am using EF6 with the database first approach. The database has three simple tables: Person, Token and Template...For the database I have generated the edmx model and entities...Person.cs...public partial class Person { public Person() { this.Tokens = new HashSet<Token>(); } public long Id { get; set; } public string F...

error 2019: Member Mapping specified is not valid using Entity Framework Code First

I am implementing Entity Framework Code-First methodology in my project and got stuck in an issue....Error Details:... 18,12) : error 2019: Member Mapping specified is not valid. The type 'Edm.Byte[Nullable=False,DefaultValue=]' of member 'status' in type 'IMS.DAL.Users_mast' is not compatible with 'SqlServer.binary[Nullable=False,DefaultValue=...

EF Code First Foreign key must be mapped to some AssociationSet or EntitySets participating in a foreign key association on the conceptual side

we want to migrate our project from Database-First to Code-First. For this task i used the Code First from database Generator from Visual Studio. I have some tables with concatenated PKs and FKs. I cannot change them to one simple "ID", because there is a legacy application that needs them this way. The EF version is 6.1.3...When i start my program...

Getting error "The parameter was not bound in the specified LINQ to Entities query expression."

I am trying to create a generic way to find deals that have a date that fall within a list of user-specified date ranges. Here's my code:...var closeDates = new List<Range<DateTime>> {{ new Range<DateTime>{ Start = DateTime.Now, End = DateTime.Now.AddDays(1) }}; var deals = dbContext.Deals.AsQueryable(); deals = _helperService.ApplyDateRanges(...

I want to show relationship with following classes but I got these error

public class Newtask { [Key] public int TId { get; set; } public string Name { get; set; } public int Estimated_days_of_work { get; set; } public virtual ICollection<Enrollment> Enrollments { get; set; } public virtual ICollection<Subtask> Subtasks { get; set; } } public class Subtask { [Key] public int SId { get; s...

"Error mapping types" error on AutoMapper for ICollection typed members

I'm getting following error message when trying to cast DTO to Model....MEMBER_Model model = Mapper.Map<MEMBER_Model>(item); ...Error mapping types....Mapping types: T_MEMBER -> MEMBER_Model TL.CFM.DATA.T_MEMBER -> TL.CFM.CORE.MEMBER_Model...Type Map configuration: T_MEMBER -> MEMBER_Model TL.CFM.DATA.T_MEMBER -> TL.CFM.CORE.MEMBER_Model...Dest...