18 lines
777 B
Dart
18 lines
777 B
Dart
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part of graphql_schema.src.schema;
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class GraphQLUnionType<Value, Serialized> extends GraphQLType<Value, Serialized>
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with
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_NonNullableMixin<Value, Serialized> {
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final List<GraphQLType<Value, Serialized>> possibleTypes;
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final String description;
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GraphQLUnionType(this.possibleTypes, {this.description}) {
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assert(possibleTypes.every((
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t) => t is GraphQLUnionType), 'The member types of a Union type must all be Object base types; Scalar, Interface and Union types may not be member types of a Union. Similarly, wrapping types may not be member types of a Union');
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assert(possibleTypes
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.isNotEmpty, 'A Union type must define one or more member types');
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}
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@override
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String get name => possibleTypes.map((t) => t.name).join(' | ')
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}
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