Dotnet api graphql linux

Creating a Project

Copy the project from RAID array

Sorry no help here

Add the packages

dotnet add package GraphQL

Create Database

Change the connection string

"CarvedRock": "Server=.;Database=CarvedRock;Trusted_Connection=False;User Id=test;Password=nottherealone"

Update the database

dotnet ef database update

Run the Site

To the site and look at https://localhost:5001/ui/playground

Creating a Schema

Create a Product Graph Type

Create Fields based on Meta Fields within ObjectGraphType

    public class ProductType: ObjectGraphType<Product>
    {
        public ProductType()
        {
            Field(t => t.Id);
            Field(t => t.Name).Description("The name of the product");
            Field(t => t.Description);
        }
    }

Create a Query

Create a Query which looks in the repository (DB) and gets all of the products.

    public class CarvedRockQuery: ObjectGraphType
    {
        public CarvedRockQuery(ProductRepository productRepository)
        {
            Field<ListGraphType<ProductType>>(
                "products", 
                resolve: context => productRepository.GetAll()
            );
        }
    }

Create a Schema for the Carved Rock Query

This holds the queries the schema supports. In our case the CarvedRockQuery created above

    public class CarvedRockSchema: Schema
    {
        public CarvedRockSchema(IDependencyResolver resolver): base(resolver)
        {           
            Query = resolver.Resolve<CarvedRockQuery>();
        }
    }

Configuring ASP .NET Core

In the Startup, Add the dependency resolver to the services, add the Schema and GraphQL configuring options.

        public void ConfigureServices(IServiceCollection services)
        {

            services.AddScoped<IDependencyResolver>(s => new FuncDependencyResolver(s.GetRequiredService));

            services.AddScoped<CarvedRockSchema>();

            services.AddGraphQL(o => { o.ExposeExceptions = false; })
                .AddGraphTypes(ServiceLifetime.Scoped);

Add the GraphQL to the middleware

        public void Configure(
            IApplicationBuilder app, 
            CarvedRockDbContext dbContext)
        {
           app.UseGraphQL<CarvedRockSchema>();
           app.UseGraphQLPlayground(new GraphQLPlaygroundOptions());

Creating a GraphQL API

Adding Scalar Type

Here is an example of creating a product type Enum

    public class ProductTypeEnumType: EnumerationGraphType<Data.ProductType>
    {
        public ProductTypeEnumType()
        {
            Name = "Type";
            Description = "The type of product";
        }
    }

Lets add that to our Product type

    public class ProductType: ObjectGraphType<Product>
    {
        public ProductType()
        {
            Field(t => t.Id);
...
            Field<ProductTypeEnumType>("Type", "The type of product");
...