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buildClientSchema: build enum type value maps lazily #4424

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buildClientSchema: build enum type value maps lazily #4424

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27 changes: 15 additions & 12 deletions src/type/definition.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1522,7 +1522,7 @@ export class GraphQLEnumType /* <T> */ implements GraphQLSchemaElement {

private _values:
| ReadonlyArray<GraphQLEnumValue /* <T> */>
| (() => GraphQLEnumValueConfigMap);
| (() => ReadonlyArray<GraphQLEnumValue>) /* <T> */;

private _valueLookup: ReadonlyMap<any /* T */, GraphQLEnumValue> | null;
private _nameLookup: ObjMap<GraphQLEnumValue> | null;
Expand All @@ -1534,13 +1534,7 @@ export class GraphQLEnumType /* <T> */ implements GraphQLSchemaElement {
this.astNode = config.astNode;
this.extensionASTNodes = config.extensionASTNodes ?? [];

this._values =
typeof config.values === 'function'
? config.values
: Object.entries(config.values).map(
([valueName, valueConfig]) =>
new GraphQLEnumValue(this, valueName, valueConfig),
);
this._values = defineEnumValues.bind(undefined, this, config.values);
this._valueLookup = null;
this._nameLookup = null;
}
Expand All @@ -1551,10 +1545,7 @@ export class GraphQLEnumType /* <T> */ implements GraphQLSchemaElement {

getValues(): ReadonlyArray<GraphQLEnumValue /* <T> */> {
if (typeof this._values === 'function') {
this._values = Object.entries(this._values()).map(
([valueName, valueConfig]) =>
new GraphQLEnumValue(this, valueName, valueConfig),
);
this._values = this._values();
}
return this._values;
}
Expand Down Expand Up @@ -1684,6 +1675,18 @@ export class GraphQLEnumType /* <T> */ implements GraphQLSchemaElement {
}
}

function defineEnumValues(
parentEnum: GraphQLEnumType,
values: ThunkObjMap<GraphQLEnumValueConfig /* <T> */>,
): ReadonlyArray<GraphQLEnumValue> {
const valueMap = resolveObjMapThunk(values);

return Object.entries(valueMap).map(
([valueName, valueConfig]) =>
new GraphQLEnumValue(parentEnum, valueName, valueConfig),
);
}

function didYouMeanEnumValue(
enumType: GraphQLEnumType,
unknownValueStr: string,
Expand Down
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