schema: make `fields` and `clauses` exact (#843)

Summary:
This affords more flexibility to clients, because an exact value can be
used in place of an inexact value, but not vice versa.

Test Plan:
Running `yarn flow` suffices.

wchargin-branch: schema-exact-type-fields
This commit is contained in:
William Chargin 2018-09-17 12:07:52 -07:00 committed by GitHub
parent 1ad2cc0958
commit f966ce300f
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1 changed files with 3 additions and 3 deletions

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@ -33,8 +33,8 @@ export type ObjectId = string;
// are not.
export type Schema = {+[Typename]: NodeType};
export type NodeType =
| {|+type: "OBJECT", +fields: {+[Fieldname]: FieldType}|}
| {|+type: "UNION", +clauses: {+[Typename]: true}|};
| {|+type: "OBJECT", +fields: {|+[Fieldname]: FieldType|}|}
| {|+type: "UNION", +clauses: {|+[Typename]: true|}|};
export type FieldType =
| {|+type: "ID"|}
| {|+type: "PRIMITIVE"|}
@ -101,7 +101,7 @@ export function object(fields: {[Fieldname]: FieldType}): NodeType {
}
export function union(clauses: $ReadOnlyArray<Typename>): NodeType {
const clausesMap = {};
const clausesMap: {|[Typename]: true|} = ({}: any);
for (const clause of clauses) {
if (clausesMap[clause] != null) {
throw new Error(`duplicate union clause: "${clause}"`);