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feat(parser): fix DynamoDBStreamChangeRecordSchema.dynamodb type #4817

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Merged
sdangol merged 2 commits into from
Nov 25, 2025
+42 −30
Merged

feat(parser): fix DynamoDBStreamChangeRecordSchema.dynamodb type #4817

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ec6cf2e
Suffix all schemas with `Schema` in dynamodb.ts
benthorner Nov 25, 2025
31be3da
Fix DynamoDBStreamChangeRecordSchema.dynamodb type
benthorner Nov 25, 2025
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72 changes: 42 additions & 30 deletions packages/parser/src/schemas/dynamodb.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ import type { KinesisEnvelope } from '../envelopes/kinesis.js';
import type { DynamoDBMarshalled } from '../helpers/dynamodb.js';
import type { DynamoDBStreamEvent } from '../types/schema.js';

const DynamoDBStreamChangeRecordBase = z.object({
const DynamoDBStreamChangeRecordBaseSchema = z.object({
ApproximateCreationDateTime: z.number().optional(),
Keys: z.record(z.string(), z.record(z.string(), z.any())),
NewImage: z.record(z.string(), z.any()).optional(),
Expand All @@ -19,19 +19,28 @@ const DynamoDBStreamChangeRecordBase = z.object({
]),
});

const DynamoDBStreamToKinesisChangeRecord = DynamoDBStreamChangeRecordBase.omit(
{
type DynamoDBStreamChangeRecordBase = z.infer<
typeof DynamoDBStreamChangeRecordBaseSchema
>;

const DynamoDBStreamToKinesisChangeRecordSchema =
DynamoDBStreamChangeRecordBaseSchema.omit({
SequenceNumber: true,
StreamViewType: true,
}
);
});

type DynamoDBStreamToKinesisChangeRecord = z.infer<
typeof DynamoDBStreamToKinesisChangeRecordSchema
>;

const unmarshallDynamoDBTransform = (
object:
| z.infer<typeof DynamoDBStreamChangeRecordBase>
| z.infer<typeof DynamoDBStreamToKinesisChangeRecord>,
const unmarshallDynamoDBTransform = <
T extends
| DynamoDBStreamChangeRecordBase
| DynamoDBStreamToKinesisChangeRecord,
>(
object: T,
ctx: z.RefinementCtx
) => {
): T => {
const result = { ...object };

const unmarshallAttributeValue = (
Expand Down Expand Up @@ -73,24 +82,27 @@ const unmarshallDynamoDBTransform = (
return result;
};

const DynamoDBStreamChangeRecord = DynamoDBStreamChangeRecordBase.transform(
unmarshallDynamoDBTransform
);
const DynamoDBStreamChangeRecordSchema =
DynamoDBStreamChangeRecordBaseSchema.transform(
unmarshallDynamoDBTransform<
DynamoDBStreamChangeRecordBase | DynamoDBStreamToKinesisChangeRecord
>
);

const UserIdentity = z.object({
const UserIdentitySchema = z.object({
type: z.enum(['Service']),
principalId: z.literal('dynamodb.amazonaws.com'),
});

const DynamoDBStreamRecord = z.object({
const DynamoDBStreamRecordSchema = z.object({
eventID: z.string(),
eventName: z.enum(['INSERT', 'MODIFY', 'REMOVE']),
eventVersion: z.string(),
eventSource: z.literal('aws:dynamodb'),
awsRegion: z.string(),
eventSourceARN: z.string(),
dynamodb: DynamoDBStreamChangeRecord,
userIdentity: UserIdentity.optional(),
dynamodb: DynamoDBStreamChangeRecordSchema,
userIdentity: UserIdentitySchema.optional(),
});

/**
Expand Down Expand Up @@ -135,12 +147,12 @@ const DynamoDBStreamRecord = z.object({
* type CustomEvent = z.infer<typeof CustomSchema>;
* ```
*/
const DynamoDBStreamToKinesisRecord = DynamoDBStreamRecord.extend({
const DynamoDBStreamToKinesisRecordSchema = DynamoDBStreamRecordSchema.extend({
recordFormat: z.literal('application/json'),
tableName: z.string(),
userIdentity: UserIdentity.nullish(),
dynamodb: DynamoDBStreamToKinesisChangeRecord.transform(
unmarshallDynamoDBTransform
userIdentity: UserIdentitySchema.nullish(),
dynamodb: DynamoDBStreamToKinesisChangeRecordSchema.transform(
unmarshallDynamoDBTransform<DynamoDBStreamToKinesisChangeRecord>
),
}).omit({
eventVersion: true,
Expand Down Expand Up @@ -256,8 +268,8 @@ const DynamoDBStreamToKinesisRecord = DynamoDBStreamRecord.extend({
* @see {@link DynamoDBStreamEvent | DynamoDBStreamEvent}
* @see {@link https://docs.aws.amazon.com/lambda/latest/dg/with-ddb.html}
*/
const DynamoDBStreamSchema = z.object({
Records: z.array(DynamoDBStreamRecord).nonempty(),
const DynamoDBStreamSchemaSchema = z.object({
Records: z.array(DynamoDBStreamRecordSchema).nonempty(),
window: z
.object({
start: z.iso.datetime(),
Expand All @@ -272,11 +284,11 @@ const DynamoDBStreamSchema = z.object({
});

export {
DynamoDBStreamToKinesisRecord,
DynamoDBStreamToKinesisChangeRecord,
DynamoDBStreamSchema,
DynamoDBStreamRecord,
DynamoDBStreamChangeRecord,
DynamoDBStreamChangeRecordBase,
UserIdentity,
DynamoDBStreamToKinesisRecordSchema as DynamoDBStreamToKinesisRecord,
DynamoDBStreamToKinesisChangeRecordSchema as DynamoDBStreamToKinesisChangeRecord,
DynamoDBStreamSchemaSchema as DynamoDBStreamSchema,
DynamoDBStreamRecordSchema as DynamoDBStreamRecord,
DynamoDBStreamChangeRecordSchema as DynamoDBStreamChangeRecord,
DynamoDBStreamChangeRecordBaseSchema as DynamoDBStreamChangeRecordBase,
UserIdentitySchema as UserIdentity,
};
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