protected IRequestExecutor CreateSchema <TEntity, T>(
TEntity[] entities,
FilterConvention?convention = null,
bool withPaging = false,
Action <ISchemaBuilder>?configure = null)
where TEntity : class
where T : FilterInputType <TEntity>
{
convention ??= new FilterConvention(x => x.AddDefaults().BindRuntimeType <TEntity, T>());
Func <IResolverContext, IEnumerable <TEntity> > resolver = BuildResolver(entities);
ISchemaBuilder builder = SchemaBuilder.New()
.AddConvention <IFilterConvention>(convention)
.AddFiltering()
.AddQueryType(
c =>
{
IObjectFieldDescriptor field = c
.Name("Query")
.Field("root")
.Resolve(resolver);
if (withPaging)
{
field.UsePaging <ObjectType <TEntity> >();
}
field.UseFiltering <T>();
field = c
.Name("Query")
.Field("rootExecutable")
.Resolve(ctx => resolver(ctx).AsExecutable());
if (withPaging)
{
field.UsePaging <ObjectType <TEntity> >();
}
field.UseFiltering <T>();
});
configure?.Invoke(builder);
ISchema schema = builder.Create();
return(schema.MakeExecutable());
}
private void ApplyConfigurationToField <TEntity, TType>(
IObjectFieldDescriptor field,
bool withPaging)
where TEntity : class
where TType : FilterInputType <TEntity>
{
field.Use(
next => async context =>
{
await next(context);
if (context.Result is IQueryable <TEntity> queryable)
{
try
{
context.ContextData["sql"] = queryable.ToQueryString();
}
catch (Exception)
{
context.ContextData["sql"] =
"EF Core 3.1 does not support ToQueryString";
}
}
});
if (withPaging)
{
field.UsePaging <ObjectType <TEntity> >();
}
field.UseFiltering <TType>();
}
/// <summary>
/// Adds cursor pagination support to the field. Rewrites the type to a connection type and
/// registers the mongo pagination handler
/// </summary>
/// <param name="descriptor">The descriptor of the field</param>
/// <param name="type">
/// The schema type of the entity. Not a connection type
/// </param>
/// <param name="entityType">The type of the entity</param>
/// <param name="options">The options for pagination</param>
/// <returns>The <paramref name="descriptor"/></returns>
public static IObjectFieldDescriptor UseMongoDbPaging(
this IObjectFieldDescriptor descriptor,
Type?type = null,
Type?entityType = null,
PagingOptions options = default) =>
descriptor.UsePaging(
type,
entityType,
(services, sourceType) => services.GetService <MongoDbCursorPagingProvider>() ??
new MongoDbCursorPagingProvider(),
options);
private static void ApplyConfigurationToFieldDescriptor <TEntity>(
IObjectFieldDescriptor descriptor,
Type?type,
bool usePaging = false,
bool useOffsetPaging = false)
{
if (usePaging)
{
descriptor.UsePaging(nodeType: type ?? typeof(ObjectType <TEntity>));
}
if (useOffsetPaging)
{
descriptor.UseOffsetPaging(type ?? typeof(ObjectType <TEntity>));
}
descriptor
.Use(
next => async context =>
{
await next(context);
if (context.Result is IQueryable <TEntity> queryable)
{
try
{
context.ContextData["sql"] = queryable.ToQueryString();
}
catch (Exception ex)
{
context.ContextData["sql"] = ex.Message;
}
context.Result = await queryable.ToListAsync();
}
if (context.Result is IExecutable executable)
{
try
{
context.ContextData["sql"] = executable.Print();
}
catch (Exception ex)
{
context.ContextData["sql"] = ex.Message;
}
}
})
.UseProjection()
.UseFiltering()
.UseSorting();
}
protected IRequestExecutor CreateSchema <TEntity, T>(
TEntity[] entities,
FilterConvention?convention = null,
bool withPaging = false)
where TEntity : class
where T : FilterInputType <TEntity>
{
convention ??= new FilterConvention(x => x.AddDefaults().BindRuntimeType <TEntity, T>());
Func <IResolverContext, IEnumerable <TEntity> >?resolver = BuildResolver(entities);
ISchemaBuilder builder = SchemaBuilder.New()
.AddConvention <IFilterConvention>(convention)
.AddFiltering()
.AddQueryType(
c =>
{
IObjectFieldDescriptor field = c
.Name("Query")
.Field("root")
.Resolver(resolver)
.Use(
next => async context =>
{
await next(context);
if (context.Result is IQueryable <TEntity> queryable)
{
try
{
context.ContextData["sql"] = queryable.ToQueryString();
}
catch (Exception)
{
context.ContextData["sql"] =
"EF Core 3.1 does not support ToQueryString";
}
}
});
if (withPaging)
{
field.UsePaging <ObjectType <TEntity> >();
}
field.UseFiltering <T>();
});
ISchema schema = builder.Create();
return(new ServiceCollection()
.Configure <RequestExecutorFactoryOptions>(
Schema.DefaultName,
o => o.Schema = schema)
.AddGraphQL()
.UseRequest(
next => async context =>
{
await next(context);
if (context.Result is IReadOnlyQueryResult result &&
context.ContextData.TryGetValue("sql", out var queryString))
{
context.Result =
QueryResultBuilder
.FromResult(result)
.SetContextData("sql", queryString)
.Create();
}
})
.UseDefaultPipeline()
.Services
.BuildServiceProvider()
.GetRequiredService <IRequestExecutorResolver>()
.GetRequestExecutorAsync()
.Result);
}