public void Create_InputObject_field()
{
/* Given */
var builder = new SchemaBuilder();
builder.InputObject(
name: "Input1",
out var input1);
/* When */
builder.Connections(connect => connect
.InputField(
owner: input1,
fieldName: "field1",
to: ScalarType.NonNullBoolean,
defaultValue: true,
description: "Descriptipn",
directives: new DirectiveInstance[]
{
/* directive */
})
);
/* Then */
var isDefined = false;
builder.Connections(connect => isDefined = connect.TryGetInputField(input1, "field1", out _));
Assert.True(isDefined);
}
private InputObjectType InputObject(__Type type)
{
if (_builder.TryGetType <InputObjectType>(type.Name, out var owner))
{
return(owner);
}
_builder.InputObject(type.Name, out owner, type.Description);
if (type.InputFields != null && type.InputFields.Any())
{
_builder.Connections(connect =>
{
foreach (var field in type.InputFields)
{
connect.InputField(
owner,
field.Name,
InputType(field.Type),
field.DefaultValue,
field.Description);
}
});
}
return(owner);
}
protected IEnumerable <(string Name, IType Type, object DefaultValue, string Description)> Args(
IEnumerable <GraphQLInputValueDefinition> definitions)
{
var args = new List <(string Name, IType Type, object DefaultValue, string Description)>();
foreach (var definition in definitions)
{
var type = InputType(definition.Type);
object defaultValue = null;
try
{
_builder.Connections(connections =>
{
defaultValue = Values.CoerceValue(
connections.GetInputFields,
definition.DefaultValue,
type);
});
}
catch (Exception)
{
defaultValue = null;
}
args.Add((definition.Name.Value, type, defaultValue, default));
public static SchemaBuilder UseResolversAndSubscribers(
this SchemaBuilder builder,
IResolverMap resolvers,
ISubscriberMap subscribers = null)
{
foreach (var type in builder.GetTypes <ObjectType>())
{
builder.Connections(connections =>
{
foreach (var field in connections.GetFields(type))
{
var resolver = resolvers.GetResolver(type.Name, field.Key);
if (resolver != null)
{
connections.GetOrAddResolver(type, field.Key)
.Run(resolver);
}
var subscriber = subscribers?.GetSubscriber(type.Name, field.Key);
if (subscriber != null)
{
connections.GetOrAddSubscriber(type, field.Key)
.Run(subscriber);
}
}
});
}
return(builder);
}
private static void MergeInputType(ISchema right, SchemaBuilder builder, InputObjectType rightType)
{
if (builder.TryGetType <InputObjectType>(rightType.Name, out var leftType))
{
var rightTypeFields = right.GetInputFields(rightType.Name);
foreach (var rightTypeField in rightTypeFields)
{
builder.Connections(connect =>
{
if (connect.TryGetInputField(leftType, rightTypeField.Key, out _))
{
return;
}
connect.Include(leftType, new[] { rightTypeField });
});
}
}
else
{
builder
.Include(rightType)
.Connections(connect =>
{
var fields = right.GetInputFields(rightType.Name).ToList();
connect.Include(rightType, fields);
});
}
}
public void Create_Object_field_when_type_not_known()
{
/* Given */
var builder = new SchemaBuilder();
var object1 = new ObjectType("Type");
/* When */
var exception = Assert.Throws <SchemaBuilderException>(() => builder.Connections(connect =>
{
connect.Field(
owner: object1,
fieldName: "field1",
to: ScalarType.Int,
description: "Description",
resolve: null,
subscribe: null,
directives: new DirectiveInstance[]
{
/* directive */
},
args => args.Arg(
name: "arg1",
type: ScalarType.Boolean,
defaultValue: true,
description: "Description")
);
}));
/* Then */
Assert.Equal("Type", exception.TypeName);
}
protected IEnumerable <(string Name, IType Type, object DefaultValue, string Description)> Args(
IEnumerable <InputValueDefinition>?definitions)
{
var args = new List <(string Name, IType Type, object DefaultValue, string Description)>();
if (definitions == null)
{
return(args);
}
foreach (var definition in definitions)
{
var type = InputType(definition.Type);
object?defaultValue = null;
try
{
_builder.Connections(connections =>
{
defaultValue = Values.CoerceValue(
connections.GetInputFields,
_builder.GetValueConverter,
definition.DefaultValue?.Value,
type);
});
}
catch (Exception)
{
defaultValue = null;
}
args.Add((definition.Name, type, defaultValue, default));
public void Create_Object_field()
{
/* Given */
var builder = new SchemaBuilder();
builder.Object(
name: "Object1",
out var object1);
/* When */
builder.Connections(connect =>
{
connect.Field(
owner: object1,
fieldName: "field1",
to: ScalarType.Int,
description: "Description",
resolve: null,
subscribe: null,
directives: new DirectiveInstance[]
{
/* directive */
},
args => args.Arg(
name: "arg1",
type: ScalarType.Boolean,
defaultValue: true,
description: "Description")
);
});
/* Then */
var isDefined = false;
builder.Connections(connect => isDefined = connect.TryGetField(object1, "field1", out _));
Assert.True(isDefined);
}
private static void MergeComplexTypeFields(ISchema right, SchemaBuilder builder, ComplexType rightType)
{
if (builder.TryGetType <ComplexType>(rightType.Name, out var leftType))
{
var rightTypeFields = right.GetFields(rightType.Name);
foreach (var rightTypeField in rightTypeFields)
{
builder.Connections(connect =>
{
// if field already exists skip it
if (connect.TryGetField(leftType, rightTypeField.Key, out _))
{
return;
}
// include field
connect.Include(leftType, rightTypeField);
// include resolver
var resolver = right.GetResolver(rightType.Name, rightTypeField.Key);
if (resolver != null)
{
connect.GetOrAddResolver(leftType, rightTypeField.Key)
.Run(resolver);
}
// include subscriber
var subscriber = right.GetSubscriber(rightType.Name, rightTypeField.Key);
if (subscriber != null)
{
connect.GetOrAddSubscriber(leftType, rightTypeField.Key)
.Run(subscriber);
}
});
}
}
else
{
throw new SchemaBuilderException(
rightType.Name,
$"Cannot merge fields of {rightType}. Type is now known by builder. " +
$"Call MergeComplexType first.");
}
}
public async Task Part2_BindResolvers_Manual()
{
// Create builder and load sdl
var builder = new SchemaBuilder()
.Sdl(@"
type Query {
name: String
}
");
// Get query type
builder.GetQuery(out var query);
// Connections are used to defined fields and resolvers.
// Connections method can be called multiple times.
builder.Connections(connections =>
{
// Get or add resolver builder for Query.name field
var nameResolverBuilder = connections
.GetOrAddResolver(query, "name");
// "Run" allows us to define an end of the resolver
// chain. You can add "middlewares" using "Use".
nameResolverBuilder
.Run(context =>
{
// Create result using Test as the value
var result = Resolve.As("Test");
// Resolvers can be sync or async so
// ValueTask result is used to reduce
// allocations
return(new ValueTask <IResolverResult>(result));
});
});
// Build schema with the resolver
var schema = builder.Build();
// Get resolver for Query.name field
var nameResolver = schema.GetResolver(schema.Query.Name, "name");
// Execute the resolver. This is normally handled by the executor.
var nameValue = await nameResolver(null);
Assert.Equal("Test", nameValue.Value);
}
public static SchemaBuilder Create()
{
var builder = new SchemaBuilder();
var Episode = new EnumType("Episode", new EnumValues
{
["NEWHOPE"] = null,
["EMPIRE"] = null,
["JEDI"] = null
});
builder.Include(Episode);
var EpisodeList = new List(Episode);
builder.Interface("Character", out var Character,
"Character in the movie");
// use NamedTypeReference as proxy to bypass circular dependencies
var CharacterList = new List(Character);
builder.Connections(connect => connect
.Field(Character, "id", ScalarType.NonNullString)
.Field(Character, "name", ScalarType.NonNullString)
.Field(Character, "friends", CharacterList)
.Field(Character, "appearsIn", EpisodeList));
builder.Object("Human", out var Human,
"Human character",
new[] { Character })
.Connections(connect => connect
.Field(Human, "id", ScalarType.NonNullString)
.Field(Human, "name", ScalarType.NonNullString)
.Field(Human, "friends", CharacterList)
.Field(Human, "appearsIn", EpisodeList)
.Field(Human, "homePlanet", ScalarType.String));
builder.Query(out var Query)
.Connections(connect => connect
.Field(Query, "human", Human,
args: args => args.Arg("id", ScalarType.NonNullString, default, default))
public void Build_types()
{
/* Given */
var builder = new SchemaBuilder();
builder.Object("Object1", out var object1);
builder.Query(out var query);
builder.Connections(connect => connect
.Field(object1, "field1", ScalarType.Float)
.Field(query, "field1", object1));
/* When */
var sut = builder.Build();
/* Then */
var types = sut.QueryTypes <INamedType>();
Assert.Contains(types, t => t.Name == "Query");
Assert.Contains(types, t => t.Name == "Object1");
}
public void Create_Interface_field()
{
/* Given */
var builder = new SchemaBuilder();
builder.Interface(
name: "Interface1",
out var interface1);
/* When */
builder.Connections(connect =>
{
connect.Field(
owner: interface1,
fieldName: "field1",
to: ScalarType.Int,
description: "Description",
resolve: null,
subscribe: null,
directives: new DirectiveInstance[]
{
/* directive */
},
(Name: "arg1",
Type: ScalarType.Boolean,
DefaultValue: true,
Description: "Description")
);
});
/* Then */
var isDefined = false;
builder.Connections(connect => isDefined = connect.TryGetField(interface1, "field1", out _));
Assert.True(isDefined);
}
public void Create_InputObject_field_when_type_not_known()
{
/* Given */
var builder = new SchemaBuilder();
var input1 = new InputObjectType("Type");
/* When */
var exception = Assert.Throws <SchemaBuilderException>(() => builder.Connections(connect => connect
.InputField(
owner: input1,
fieldName: "field1",
to: ScalarType.NonNullBoolean,
defaultValue: true,
description: "Descriptipn",
directives: new DirectiveInstance[]
{
/* directive */
})
));
/* Then */
Assert.Equal("Type", exception.TypeName);
}
private static void MergeComplexType(ISchema right, SchemaBuilder builder, ComplexType rightType)
{
if (builder.TryGetType <ComplexType>(rightType.Name, out var leftType))
{
var rightTypeFields = right.GetFields(rightType.Name);
foreach (var rightTypeField in rightTypeFields)
{
builder.Connections(connect =>
{
if (connect.TryGetField(leftType, rightTypeField.Key, out _))
{
return;
}
connect.Include(leftType, new[] { rightTypeField });
var resolver = right.GetResolver(rightType.Name, rightTypeField.Key);
if (resolver != null)
{
connect.GetOrAddResolver(leftType, rightTypeField.Key)
.Run(resolver);
}
var subscriber = right.GetSubscriber(rightType.Name, rightTypeField.Key);
if (subscriber != null)
{
connect.GetOrAddSubscriber(leftType, rightTypeField.Key)
.Run(subscriber);
}
});
}
}
else
{
builder
.Include(rightType)
.Connections(connect =>
{
var fields = right.GetFields(rightType.Name).ToList();
connect.Include(rightType, fields);
foreach (var rightTypeField in fields)
{
var resolver = right.GetResolver(rightType.Name, rightTypeField.Key);
if (resolver != null)
{
connect.GetOrAddResolver(rightType, rightTypeField.Key)
.Run(resolver);
}
var subscriber = right.GetSubscriber(rightType.Name, rightTypeField.Key);
if (subscriber != null)
{
connect.GetOrAddSubscriber(rightType, rightTypeField.Key)
.Run(subscriber);
}
}
});
}
}
public static ISchema MakeRemoteExecutable(
SchemaBuilder builder,
ExecutionResultLink link,
Func <ExecutionResultLink, Resolver> createResolver = null,
Func <ExecutionResultLink, Subscriber> createSubscriber = null)
{
if (createResolver == null)
{
createResolver = DefaultCreateRemoteResolver;
}
if (createSubscriber == null)
{
createSubscriber = DefaultCreateRemoteSubscriber;
}
// add remote resolver for query
if (builder.TryGetType <ObjectType>("Query", out var queryType))
{
builder.Connections(connections =>
{
var fields = connections.VisitFields(queryType);
foreach (var field in fields)
{
var resolver = connections.GetOrAddResolver(queryType, field.Key);
resolver.Run(createResolver(link));
}
});
}
if (builder.TryGetType <ObjectType>("Mutation", out var mutationType))
{
builder.Connections(connections =>
{
var fields = connections.VisitFields(mutationType);
foreach (var field in fields)
{
var resolver = connections.GetOrAddResolver(mutationType, field.Key);
resolver.Run(createResolver(link));
}
});
}
if (builder.TryGetType <ObjectType>("Subscription", out var subscriptionType))
{
builder.Connections(connections =>
{
var fields = connections.VisitFields(subscriptionType);
foreach (var field in fields)
{
if (!connections.TryGetSubscriber(subscriptionType, field.Key, out _))
{
var subscriber = connections.GetOrAddSubscriber(subscriptionType, field.Key);
subscriber.Run(createSubscriber(link));
}
}
});
}
foreach (var objectType in builder.VisitTypes <ObjectType>())
{
builder.Connections(connections =>
{
foreach (var field in connections.VisitFields(objectType))
{
if (!connections.TrGetResolver(objectType, field.Key, out _))
{
var resolver = connections.GetOrAddResolver(objectType, field.Key);
resolver.Run(DefaultDictionaryResolver());
}
}
});
}
return(builder.Build());
}
public static SchemaBuilder ApplyDirectives(
this SchemaBuilder builder,
IReadOnlyDictionary <string, CreateDirectiveVisitor> directiveFactories)
{
if (directiveFactories == null)
{
throw new ArgumentNullException(nameof(directiveFactories));
}
foreach (var(directiveName, visitor) in directiveFactories.Select(d => (d.Key, d.Value(builder))))
{
foreach (var objectType in builder.GetTypes <ObjectType>())
{
builder.Connections(connections =>
{
var fields = connections.GetFields(objectType)
.Where(field => field.Value.HasDirective(directiveName))
.ToList();
foreach (var field in fields)
{
var directive = field.Value.GetDirective(directiveName);
if (visitor.FieldDefinition == null)
{
continue;
}
var resolver = connections.GetOrAddResolver(objectType, field.Key)?.Build();
var subscriber = connections.GetOrAddSubscriber(objectType, field.Key)?.Build();
var fieldDefinition = new DirectiveFieldVisitorContext(
field.Key,
field.Value,
resolver,
subscriber);
var maybeSameField = visitor.FieldDefinition(directive, fieldDefinition);
// field not modified
if (maybeSameField == fieldDefinition)
{
continue;
}
// field removed
if (maybeSameField == null)
{
connections.Remove(objectType, field.Key);
continue;
}
// changed so remove and add
connections.Remove(objectType, field.Key);
connections.Include(objectType, new[]
{
new KeyValuePair <string, IField>(maybeSameField.Name, maybeSameField.Field)
});
connections.Include(objectType, maybeSameField.Name,
new ResolverBuilder(maybeSameField.Resolver));
connections.Include(objectType, maybeSameField.Name,
new SubscriberBuilder(maybeSameField.Subscriber));
}
});
}
}
return(builder);
}
