Error 3023 Entity Framework
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site
Entity Framework Error 3003
About Us Learn more about Stack Overflow the company Business Learn more about entity framework error 3002 problem in mapping fragments hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join
Entity Framework Error 26 - Error Locating Server/instance Specified
the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error 3023 using Entity Framework entity framework error 3007 problem in mapping fragments up vote 4 down vote favorite 2 Using the Entity Framework, I've modeled a fairly simple database schema with an ever-so-slightly more complex class hierarchy. In two places, I'm using single table inheritance with a single NVARCHAR(20) NOT NULL discriminator column. In one of those two places, it works great, no issues. But in the other place, with an almost identical pattern, I get the entity framework error 11007 entity type is not mapped following error: Error 3023: Problem in Mapping Fragments starting at lines 371, 375, 379, 382: Column MediaStream.MediaStreamTypeID has no default value and is not nullable. A column value is required to store entity data. An Entity with Key (PK) will not round-trip when: ((PK does NOT play Role 'MediaStream' in AssociationSet 'FK_MediaStream_SessionID' OR PK is NOT in 'MediaStream' EntitySet OR Entity is type [SlideLinc.Model].MediaStream) AND (PK plays Role 'MediaStream' in AssociationSet 'FK_MediaStream_SessionID' OR PK is NOT in 'MediaStream' EntitySet OR Entity is type [SlideLinc.Model].MediaStream) AND (PK plays Role 'MediaStream' in AssociationSet 'FK_MediaStream_SessionID' OR PK is in 'MediaStream' EntitySet)) Here's the table definition (not including various indexes, foreign keys, etc.): CREATE TABLE [dbo].MediaStream( [MediaStreamID] UNIQUEIDENTIFIER NOT NULL, [SessionID] UNIQUEIDENTIFIER NOT NULL, [RtmpUri] nvarchar(250) NOT NULL, [MediaStreamTypeID] nvarchar(20) NOT NULL, CONSTRAINT PK_MediaStream PRIMARY KEY CLUSTERED ( [MediaStreamID] ASC ) I'm using the MediaStreamtypeID column as the discriminator: if it's set to "video", a VideoMediaStream class should be created, and if it's set to "audio", an AudioMediaStream class should be created. The relevant portions of the EDMX file look like this: here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs entity framework error the underlying provider failed on open Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Entity Framework: Column must be mapped although it does have a default value? up vote 7 down vote favorite 4 I am trying http://stackoverflow.com/questions/994858/error-3023-using-entity-framework to create an Entity Framework 4 model based on a legacy SQL server 2008 database. Since the model is going to be published in a web service, I need to omit an integer column called NewsletterSubscribed from one of the model's entities. After removing the column in the EF designer I got the following compilation error: Error 59 Error 3023: Problem in mapping fragments starting at line 356:Column Users.NewsletterSubscribed in table Users must be http://stackoverflow.com/questions/3076496/entity-framework-column-must-be-mapped-although-it-does-have-a-default-value mapped: It has no default value and is not nullable. C:\Users\Adrian\Documents\Sites\Zeiterfassung\Zeiterfassung\API\V1\EFModel.edmx 357 15 Zeiterfassung But the column seems to have a default value of 0 bound to it. I tried running this SQL statement against the database: ALTER TABLE [dbo].[Users] ADD DEFAULT ((0)) FOR [NewsletterSubscribed] But that also fails: Msg 1781, Level 16, State 1, Line 3 Column already has a DEFAULT bound to it. Msg 1750, Level 16, State 0, Line 3 Could not create constraint. See previous errors. So either the column does not have a default value (in which case I am not sure why I can't create one), or Entity Framework doesn't see it. What is going on? Thanks, Adrian sql-server tsql entity-framework share|improve this question asked Jun 19 '10 at 17:22 Adrian Grigore 19.9k26108189 add a comment| 1 Answer 1 active oldest votes up vote 11 down vote accepted Open the .edmx with Visual Studio XML editor rather than with the Entity Designer, and add a DefaultValue="0" attribute to the unmapped column in the SSDL. For some reasons these are not generated from the database. share|improve this answer edited Dec 19 '14 at 17:21 Luke Puplett 12k1084121 answered Jun 19 '10 at 17:39 Julien Lebosquain 28.4k77190 Thank you! I've been struggling with this for weeks... –Roy Tinker May 26 '11 at 4:08 add a comment is required to store entity data There are many reasons why this error would http://jerther.blogspot.com/2014/08/entity-framework-6-code-first-error.html happen. There's a known bug in 6.1 which will be fixed in 6.2. But my problem wasn't related to it. Here's what happened for me. I https://bugs.mysql.com/bug.php?id=53188 use a single table, tbl_Person, to map a hierarchy, like this example, where Person is abstract: And I use this mapping using Fluent API: modelBuilder.Entity Apr 2011 20:39 Reporter: Michael Pritchard Email Updates: Status: Not a Bug Impact on me: None Category:Connector / NET Severity:S3 (Non-critical) Version:6.3.1, 6.3.5, 6.3.6 OS:Microsoft Windows (Vista SP2) Assigned to: Julio Casal View Add Comment Files Developer Edit Submission View Progress Log Contributions [27 Apr 2010 8:02] Michael Pritchard Description: Create an ADO.NET Entity Data Model for a database table that has columns with default values in the schema. When the .edmx file is generated it does not set the DefaultValue attribute for any columns with a default value defined. This can then cause errors trying to create entities that only expose a subset of the tables columns as properties, when a non-nullable column with a default is excluded from that entity. The error text is: "Error 1 Error 3023: Problem in mapping fragments starting at line 42:Column new table.string default in table new table must be mapped: It has no default value and is not nullable. C:\Users\...\Documents\Visual Studio 2010\Projects\TestEntities\ClassLibrary\Model1.edmx 43 15 ClassLibrary" Will attach an example with broke and fixed edmx files. I am presuming this DefaultValue should be set, I am only just starting out on Entity Framework so apologies if its not. MySQL: 5.1.31-community VS2010 Professional (Final Release) Connector: 6.3.1 How to repeat: Create the following table: CREATE TABLE `new table` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `not_null_default` tinyint(1) NOT NULL DEFAULT '0', `string default` varchar(45) NOT NULL DEFAULT 'default me', `string nullable default` varchar(45) DEFAULT 'nullable me', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1; Create a new blank Solution in VS2010 and add a single class library project. Add a new ADO.NET Entity Data Model to the class library and auto-generate from this table. If you view the generated edmx file you will see no DefaultValue attributes on the schema in the section. This does not generate an error. Then in the model designer create a new entity, add two properties and map them to the id and not_null_default columns. Delete the auto generated entity for new table. You will then get the error listed above in the description shown in the Errors window Suggested fix: The DefauEntity Framework Error 3032
Entity Framework Error 2062