Why is Migrations looking for Sql Server Provider? - entity-framework

Question

Here is my config...
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<connectionStrings>
<add name="DataContext" connectionString="Server=localhost;Port=5432;Database=myDatabase;User Id=postgres;Password=password;Preload Reader = true;" providerName="Npgsql" />
</connectionStrings>
<entityFramework>
<providers>
<provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, Npgsql.EntityFramework" />
</providers>
</entityFramework>
</configuration>
When I run update-database it gives at the end of the stack trace...
No Entity Framework provider found for the ADO.NET provider with
invariant name 'System.Data.SqlClient'. Make sure the provider is
registered in the 'entityFramework' section of the application config
file. See http://go.microsoft.com/fwlink/?LinkId=260882 for more
information.
Another error I'm running into when I add to the entityFramework section..
<defaultConnectionFactory type="Npgsql.NpgsqlFactory, Npgsql" />
Failed to set Database.DefaultConnectionFactory to an instance of the
'Npgsql.NpgsqlFactory, Npgsql' type as specified in the application
configuration.
What am I missing?

Answer 1

You could try using a DbProvidersFactories instead of the connection string:
<system.data>
<DbProviderFactories>
<remove invariant="Npgsql" />
<add name="Npgsql Data Provider" invariant="Npgsql" support="FF" description=".Net Framework Data Provider for Postgresql" type="Npgsql.NpgsqlFactory, Npgsql" />
</DbProviderFactories>
</system.data>

Answer 2

I got this working by adding Entityframework, Npgsql and Npgsql.Entityframework as three individual installs using Nuget. Then the following config...
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
<connectionStrings>
<add name="[Name of EF Context class]" connectionString="Server=localhost;Port=5432;Database=[Name of existing database];User Id=[username];Password=[password];" providerName="Npgsql" />
</connectionStrings>
<entityFramework>
<providers>
<provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, Npgsql.EntityFramework"></provider>
</providers>
<defaultConnectionFactory type="Npgsql.NpgsqlConnectionFactory, Npgsql.EntityFramework" />
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="Npgsql" />
<add name="Npgsql Data Provider" invariant="Npgsql" support="FF" description=".Net Framework Data Provider for Postgresql" type="Npgsql.NpgsqlFactory, Npgsql" />
</DbProviderFactories>
</system.data>
</configuration>