graphql_schema #

An implementation of GraphQL's type system in Dart. Supports any platform where Dart runs.

Usage #

It's easy to define a schema with the helper functions:

final GraphQLSchema todoSchema = new GraphQLSchema(
    query: objectType('Todo', [
  field('text', type: graphQLString.nonNullable()),
  field('created_at', type: graphQLDate)
]));

All GraphQL types are generic, in order to leverage Dart's strong typing support.

Serialization #

GraphQL types can serialize and deserialize input data. The exact implementation of this depends on the type.

var iso8601String = graphQLDate.serialize(new DateTime.now());
var date = graphQLDate.deserialize(iso8601String);
print(date.millisecondsSinceEpoch);

Validation #

GraphQL types can validate input data.

var validation = myType.validate('@root', {...});

if (validation.successful) {
  doSomething(validation.value);
} else {
  print(validation.errors);
}

Helpers #

• graphQLSchema - Create a GraphQLSchema
• objectType - Create a GraphQLObjectType with fields
• field - Create a GraphQLField with a type/argument/resolver
• listType - Create a GraphQLListType with the provided innerType

Types #

All of the GraphQL scalar types are built in, as well as a Date type:

• graphQLString
• graphQLId
• graphQLBoolean
• graphQLInt
• graphQLFloat
• graphQLDate

Non-Nullable Types #

You can easily make a type non-nullable by calling its nonNullable method.

List Types #

Support for list types is also included. Use the listType helper for convenience.

/// A non-nullable list of non-nullable integers
listType(graphQLInt.nonNullable()).nonNullable();