This is an implementation of Facebook's GraphQL in .NET.
This project uses a lexer/parser originally written by Marek Magdziak and released with a MIT license. Thank you Marek!
You can install the latest version via NuGet.
PM> Install-Package GraphQL
There is a sample web api project hosting the GraphiQL interface. yarn install and yarn start from the root of the repository, then run the web project from Visual Studio.
Note: Before running the GraphiQL project: make sure you Build the entire solution so that all the project references get built. (GraphQL, GraphQL-Parser, etc) to avoid missing reference/assembly errors.
> npm install -g yarn
> yarn install
> yarn start
Define your schema with a top level query object then execute that query.
A more full-featured example including all classes required can be found here.
namespace ConsoleApplication
{
using System;
using System.Threading.Tasks;
using GraphQL;
using GraphQL.Http;
using GraphQL.Types;
public class Program
{
public static void Main(string[] args)
{
Run();
}
private static async void Run()
{
Console.WriteLine("Hello GraphQL!");
var schema = new Schema { Query = new StarWarsQuery() };
var result = await new DocumentExecuter().ExecuteAsync( _ =>
{
_.Schema = schema;
_.Query = @"
query {
hero {
id
name
}
}
";
}).ConfigureAwait(false);
var json = new DocumentWriter(indent: true).Write(result);
Console.WriteLine(json);
}
}
public class Droid
{
public string Id { get; set; }
public string Name { get; set; }
}
public class DroidType : ObjectGraphType<Droid>
{
public DroidType()
{
Field(x => x.Id).Description("The Id of the Droid.");
Field(x => x.Name, nullable: true).Description("The name of the Droid.");
}
}
public class StarWarsQuery : ObjectGraphType
{
public StarWarsQuery()
{
Field<DroidType>(
"hero",
resolve: context => new Droid { Id = "1", Name = "R2-D2" }
);
}
}
}Output
Hello GraphQL!
{
"data": {
"hero": {
"id": "1",
"name": "R2-D2"
}
}
}
- Grammar and AST for the GraphQL language should be compatible with the April 2016 specification.
- Scalars
- Objects
- Lists of objects/interfaces
- Interfaces
- Unions
- Arguments
- Variables
- Fragments
- Directives
- Include
- Skip
- Custom
- Enumerations
- Input Objects
- Mutations
- Subscriptions
- Async execution
- Arguments of correct type
- Default values of correct type
- Fields on correct type
- Fragments on composite types
- Known argument names
- Known directives
- Known fragment names
- Known type names
- Lone anonymous operations
- No fragment cycles
- No undefined variables
- No unused fragments
- No unused variables
- Overlapping fields can be merged
- Possible fragment spreads
- Provide non-null arguments
- Scalar leafs
- Unique argument names
- Unique directives per location
- Unique fragment names
- Unique input field names
- Unique operation names
- Unique variable names
- Variables are input types
- Variables in allowed position
- __typename
- __type
- name
- kind
- description
- fields
- interfaces
- possibleTypes
- enumValues
- inputFields
- ofType
- __schema
- types
- queryType
- mutationType
- subscriptionType
- directives
yarn run setVersion 0.17.0
git commit/push
download nuget from AppVeyor
upload nuget package to github
publish nuget from MyGet
To run this project on macOS you will need to add some configuration. Make sure mono is installed and add the following to your bash configuration:
export FrameworkPathOverride=/Library/Frameworks/Mono.framework/Versions/4.6.2/lib/mono/4.5/See the following for more details: