System.Collections.Generic.KeyNotFoundException:
Posted by: Jovencio Sebucao
Date: August 18, 2022 01:01AM

I am trying to update the database using a code first basis. But when I am trying to update or run the migration, I get this error

System.Collections.Generic.KeyNotFoundException: The given key '21256' was not present in the dictionary.
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at MySql.Data.MySqlClient.MySqlField.SetFieldEncoding()
at MySql.Data.MySqlClient.MySqlField.set_CharacterSetIndex(Int32 value)
at MySql.Data.MySqlClient.NativeDriver.GetColumnData(MySqlField field)
at MySql.Data.MySqlClient.NativeDriver.GetColumnsData(MySqlField[] columns)
at MySql.Data.MySqlClient.Driver.GetColumns(Int32 count)
at MySql.Data.MySqlClient.ResultSet.LoadColumns(Int32 numCols)
at MySql.Data.MySqlClient.ResultSet..ctor(Driver d, Int32 statementId, Int32 numCols)
at MySql.Data.MySqlClient.Driver.NextResult(Int32 statementId, Boolean force)
at MySql.Data.MySqlClient.MySqlDataReader.NextResult()
at MySql.Data.MySqlClient.MySqlDataReader.Close()
at MySql.Data.MySqlClient.MySqlCommand.ResetReader()
at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader(CommandBehavior behavior)
at MySql.Data.MySqlClient.MySqlCommand.ExecuteReader()
at MySql.Data.MySqlClient.MySqlCommand.ExecuteScalar()
at MySql.Data.EntityFrameworkCore.MySQLDatabaseCreator.<>c__DisplayClass18_0.<Exists>b__0(DateTime giveUp)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.<>c__DisplayClass12_0`2.<Execute>b__0(DbContext c, TState s)
at MySql.Data.EntityFrameworkCore.Storage.Internal.MySQLExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.Execute[TState,TResult](IExecutionStrategy strategy, TState state, Func`2 operation, Func`2 verifySucceeded)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.Execute[TState,TResult](IExecutionStrategy strategy, TState state, Func`2 operation)
at MySql.Data.EntityFrameworkCore.MySQLDatabaseCreator.Exists(Boolean retryOnNotExists)
at MySql.Data.EntityFrameworkCore.MySQLDatabaseCreator.Exists()
at Microsoft.EntityFrameworkCore.Migrations.HistoryRepository.Exists()
at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration)
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.UpdateDatabase(String targetMigration, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabaseImpl(String targetMigration, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabase.<>c__DisplayClass0_0.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
The given key '21256' was not present in the dictionary.

This is my current specifications for database

MySQL Server: 8.0.30
Connector/NET: 8.0.22

Any help would be a great help. Thank you

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System.Collections.Generic.KeyNotFoundException:
August 18, 2022 01:01AM


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