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POEntity Framework 4 with MySQL connector 6.4.3 autogenerate tables causes "Column Length" exception
 

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  1. POEntity Framework 4 with MySQL connector 6.4.3 autogenerate tables causes "Column Length" exception
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    <p>I am working with MySQL and the .Net EntityFramework 4 using the Code First approach. The mysql connector version is 6.4.3. </p> <p>When I run the project for the first time my initializer attempts to "DropCreateDatabaseAlways". The database is created as well as all the tables. Then the following exception is thrown.</p> <p><pre><code>Column length too big for column 'ModelHash' (max = 21845); use BLOB or TEXT instead Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.</p> <p>Exception Details: MySql.Data.MySqlClient.MySqlException: Column length too big for column 'ModelHash' (max = 21845); use BLOB or TEXT instead</p> <p>Source Error:</p> <p>Line 38: public virtual List GetAll() Line 39: { Line 40: return dbSet.ToList(); Line 41: } Line 42: </p> <p>Source File: C:\Users\Andrew\Documents\Visual Studio 2010\Projects\SearchCore\OnlineID.DAL\GlobalGatewayRepository.cs Line: 40</p> <p>Stack Trace:</p> <p>[MySqlException (0x80004005): Column length too big for column 'ModelHash' (max = 21845); use BLOB or TEXT instead] MySql.Data.MySqlClient.MySqlStream.ReadPacket() +198 MySql.Data.MySqlClient.NativeDriver.GetResult(Int32&amp; affectedRow, Int32&amp; insertedId) +73 MySql.Data.MySqlClient.Driver.GetResult(Int32 statementId, Int32&amp; affectedRows, Int32&amp; insertedId) +20 MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force) +100 MySql.Data.MySqlClient.MySqlDataReader.NextResult() +836 MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior) +1399 MySql.Data.MySqlClient.MySqlCommand.ExecuteNonQuery() +36 MySql.Data.MySqlClient.MySqlScript.Execute() +551 MySql.Data.MySqlClient.MySqlProviderServices.DbCreateDatabase(DbConnection connection, Nullable<code>1 commandTimeout, StoreItemCollection storeItemCollection) +260 System.Data.Objects.ObjectContext.CreateDatabase() +84 System.Data.Entity.Internal.DatabaseOperations.CreateIfNotExists(ObjectContext objectContext) +28 System.Data.Entity.Database.CreateIfNotExists() +53 System.Data.Entity.DropCreateDatabaseAlways</code>1.InitializeDatabase(TContext context) +233 System.Data.Entity.&lt;>c__DisplayClass2<code>1.&lt;SetInitializerInternal&gt;b__0(DbContext c) +75 System.Data.Entity.Internal.&lt;&gt;c__DisplayClass5.&lt;PerformDatabaseInitialization&gt;b__3() +19 System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +72 System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +169 System.Data.Entity.Internal.LazyInternalContext.&lt;InitializeDatabase&gt;b__4(InternalContext c) +7 System.Data.Entity.Internal.RetryAction</code>1.PerformAction(TInput input) +118 System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action<code>1 action) +190 System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase() +73 System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +27 System.Data.Entity.Internal.Linq.InternalSet</code>1.Initialize() +62 System.Data.Entity.Internal.Linq.InternalSet<code>1.GetEnumerator() +15 System.Data.Entity.Infrastructure.DbQuery</code>1.System.Collections.Generic.IEnumerable.GetEnumerator() +40 System.Collections.Generic.List<code>1..ctor(IEnumerable</code>1 collection) +315 System.Linq.Enumerable.ToList(IEnumerable<code>1 source) +58 OnlineID.DAL.GlobalGatewayRepository</code>1.GetAll() in C:\Users\Andrew\Documents\Visual Studio 2010\Projects\SearchCore\OnlineID.DAL\GlobalGatewayRepository.cs:40 OnlineID.BAL.AccountService.GetAccounts() in C:\Users\Andrew\Documents\Visual Studio 2010\Projects\SearchCore\OnlineID.BAL\AccountService.cs:32 OnlineID.Website.Controllers.AccountManagement.AccountManagementController.Index() in C:\Users\Andrew\Documents\Visual Studio 2010\Projects\SearchCore\OnlineID.Website\Controllers\AccountManagement\AccountManagementController.cs:29 lambda_method(Closure , ControllerBase , Object[] ) +62 System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17 System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary<code>2 parameters) +208 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary</code>2 parameters) +27 System.Web.Mvc.&lt;>c_<em>DisplayClass15.b</em>_12() +55 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func<code>1 continuation) +263 System.Web.Mvc.&lt;&gt;c__DisplayClass17.&lt;InvokeActionMethodWithFilters&gt;b__14() +19 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList</code>1 filters, ActionDescriptor actionDescriptor, IDictionary<code>2 parameters) +191 System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +343 System.Web.Mvc.Controller.ExecuteCore() +116 System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +97 System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10 System.Web.Mvc.&lt;&gt;c__DisplayClassb.&lt;BeginProcessRequest&gt;b__5() +37 System.Web.Mvc.Async.&lt;&gt;c__DisplayClass1.&lt;MakeVoidDelegate&gt;b__0() +21 System.Web.Mvc.Async.&lt;&gt;c__DisplayClass8</code>1.b__7(IAsyncResult <em>) +12 System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62 System.Web.Mvc.&lt;>c</em>_DisplayClasse.b_<em>d() +50 System.Web.Mvc.SecurityUtil.b</em>_0(Action f) +7 System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +8920029 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&amp; completedSynchronously) +184 </pre></code></p> <p>I'm not sure what this "ModelHash" column is as it does not exist in my models.</p> <p>Thanks, AFrieze</p> <hr> <p>I have identified the location of this ModelHash column, it is in the EdmMetadata table that is used to track changes. The error I am experiencing can be eliminated by adding the following modelBuilder.Conventions.Remove(); Is there a way to use EdmMetadata with MySQL then?</p>
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    1. USKev
    1. USAFrieze
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      1. POEntity Framework 4 with MySQL connector 6.4.3 autogenerate tables causes "Column Length" exception
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      1. POEntity Framework 4 with MySQL connector 6.4.3 autogenerate tables causes "Column Length" exception
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      1. POEntity Framework 4 with MySQL connector 6.4.3 autogenerate tables causes "Column Length" exception
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    1. COI have identified the location of this ModelHash column, it is in the EdmMetadata table that is used to track changes. The error I am experiencing can be eliminated by adding the following modelBuilder.Conventions.Remove<System.Data.Entity.Infrastructure.IncludeMetadataConvention>(); Is there a way to use EdmMetadata with MySQL then?
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      1. POEntity Framework 4 with MySQL connector 6.4.3 autogenerate tables causes "Column Length" exception
      1. USAFrieze
    2. COHi AFrieze, I can not create a column with tinyint(byte or sbyte) datatype by code first in mysql. do u know what is the solution?
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      1. POEntity Framework 4 with MySQL connector 6.4.3 autogenerate tables causes "Column Length" exception
      1. USGhooti Farangi
    3. COI do not. Could you use a bool instead of a byte? The bool will be created as a tinyint(1) column in the database.
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      1. POEntity Framework 4 with MySQL connector 6.4.3 autogenerate tables causes "Column Length" exception
      1. USAFrieze
 

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