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Allow a DbContext to have a derived service implementation registered #28

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57 changes: 50 additions & 7 deletions src/Extensions/EFCore.DbContextFactory/Extensions/ServiceCollectionExtensions.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,21 @@ public static class ServiceCollectionExtensions
/// <param name="logger">The <see cref="ILoggerFactory"/>implementation.</param>
public static void AddSqlServerDbContextFactory<TDataContext>(this IServiceCollection services, string nameOrConnectionString = null, ILoggerFactory logger = null)
where TDataContext : DbContext
{
services.AddSqlServerDbContextFactory<TDataContext, TDataContext>(nameOrConnectionString, logger);
}

/// <summary>
/// Configures the resolution of <typeparamref name="TContextService"/>'s factory.
/// </summary>
/// <typeparam name="TContextService">The DbContext service type.</typeparam>
/// <typeparam name="TContextImplementation">The DbContent implementation type.</typeparam>
/// <param name="services"></param>
/// <param name="nameOrConnectionString">Name or connection string of the context. (Optional)</param>
/// <param name="logger">The <see cref="ILoggerFactory"/>implementation.</param>
public static void AddSqlServerDbContextFactory<TContextService, TContextImplementation>(this IServiceCollection services, string nameOrConnectionString = null, ILoggerFactory logger = null)
where TContextService : class
where TContextImplementation : DbContext, TContextService
{
if (string.IsNullOrEmpty(nameOrConnectionString))
{
Expand All @@ -31,7 +46,7 @@ public static void AddSqlServerDbContextFactory<TDataContext>(this IServiceColle
nameOrConnectionString = configuration.GetConnectionString("DefaultConnection");
}

AddDbContextFactory<TDataContext>(services, (provider, builder) =>
AddDbContextFactory<TContextService, TContextImplementation>(services, (provider, builder) =>
builder.UseSqlServer(nameOrConnectionString)
.UseLoggerFactory(logger)
);
Expand All @@ -46,7 +61,20 @@ public static void AddSqlServerDbContextFactory<TDataContext>(this IServiceColle
public static void AddDbContextFactory<TDataContext>(this IServiceCollection services,
Action<DbContextOptionsBuilder> options)
where TDataContext : DbContext
=> AddDbContextFactory<TDataContext>(services, (provider, builder) => options.Invoke(builder));
=> AddDbContextFactory<TDataContext, TDataContext>(services, (provider, builder) => options.Invoke(builder));

/// <summary>
/// Configures the resolution of <typeparamref name="TContextService"/>'s factory.
/// </summary>
/// <typeparam name="TContextService">The DbContext service type.</typeparam>
/// <typeparam name="TContextImplementation">The DbContext implementation type.</typeparam>
/// <param name="services"></param>
/// <param name="options">The DbContext options.</param>
public static void AddDbContextFactory<TContextService, TContextImplementation>(this IServiceCollection services,
Action<DbContextOptionsBuilder> options)
where TContextService : class
where TContextImplementation : DbContext, TContextService
=> AddDbContextFactory<TContextService, TContextImplementation>(services, (provider, builder) => options.Invoke(builder));

/// <summary>
/// Configures the resolution of <typeparamref name="TDataContext"/>'s factory.
Expand All @@ -57,18 +85,33 @@ public static void AddDbContextFactory<TDataContext>(this IServiceCollection ser
public static void AddDbContextFactory<TDataContext>(this IServiceCollection services, Action<IServiceProvider, DbContextOptionsBuilder> optionsAction)
where TDataContext : DbContext
{
AddCoreServices<TDataContext>(services, optionsAction, ServiceLifetime.Scoped);
services.AddDbContextFactory<TDataContext, TDataContext>(optionsAction);
}

/// <summary>
/// Configures the resolution of <typeparamref name="TContextService"/>'s factory.
/// </summary>
/// <typeparam name="TContextService">The DbContext service type.</typeparam>
/// <typeparam name="TContextImplementation">The DbContext implementation type.</typeparam>
/// <param name="services"></param>
/// <param name="optionsAction">Service provider and DbContext options.</param>
public static void AddDbContextFactory<TContextService, TContextImplementation>(this IServiceCollection services, Action<IServiceProvider, DbContextOptionsBuilder> optionsAction)
where TContextService : class
where TContextImplementation : DbContext, TContextService
{
AddCoreServices<TContextService, TContextImplementation>(services, optionsAction, ServiceLifetime.Scoped);
var serviceProvider = services.BuildServiceProvider();
var options = serviceProvider.GetService<DbContextOptions<TDataContext>>();
var options = serviceProvider.GetService<DbContextOptions<TContextImplementation>>();

services.AddScoped<Func<TDataContext>>(ctx => () => (TDataContext)Activator.CreateInstance(typeof(TDataContext), options));
services.AddScoped<Func<TContextService>>(ctx => () => (TContextService)Activator.CreateInstance(typeof(TContextImplementation), options));
}

private static void AddCoreServices<TContextImplementation>(
private static void AddCoreServices<TContextService, TContextImplementation>(
IServiceCollection serviceCollection,
Action<IServiceProvider, DbContextOptionsBuilder> optionsAction,
ServiceLifetime optionsLifetime)
where TContextImplementation : DbContext
where TContextService : class
where TContextImplementation : DbContext, TContextService
{
serviceCollection
.AddMemoryCache()
Expand Down