private executeField(
object: StoreObject,
typename: string | void,
field: FieldNode,
execContext: ExecContext,
): ExecResult {
const { variableValues: variables, contextValue } = execContext;
const fieldName = field.name.value;
const args = argumentsObjectFromField(field, variables);
const info: ExecInfo = {
resultKey: resultKeyNameFromField(field),
directives: getDirectiveInfoFromField(field, variables),
};
const readStoreResult = readStoreResolver(
object,
typename,
fieldName,
args,
contextValue,
info,
);
if (Array.isArray(readStoreResult.result)) {
return this.combineExecResults(
readStoreResult,
this.executeSubSelectedArray(
field,
readStoreResult.result,
execContext,
),
);
}
// Handle all scalar types here
if (!field.selectionSet) {
assertSelectionSetForIdValue(field, readStoreResult.result);
if (this.freezeResults && process.env.NODE_ENV !== 'production') {
maybeDeepFreeze(readStoreResult);
}
return readStoreResult;
}
// From here down, the field has a selection set, which means it's trying to
// query a GraphQLObjectType
if (readStoreResult.result == null) {
// Basically any field in a GraphQL response can be null, or missing
return readStoreResult;
}
// Returned value is an object, and the query has a sub-selection. Recurse.
return this.combineExecResults(
readStoreResult,
this.executeSelectionSet({
selectionSet: field.selectionSet,
rootValue: readStoreResult.result,
execContext,
}),
);
}
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