fix: support expression attrbitube names in projection expressions. (#27

)
sam-goodwin · Apr 13, 2022 · 8c3c220 · 8c3c220
1 parent 2ca185f
commit 8c3c220
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diff --git a/src/query.ts b/src/query.ts
@@ -22,6 +22,7 @@ export type QueryInput<
 > &
   ExpressionAttributeNames<KeyConditionExpression> &
   ExpressionAttributeNames<FilterExpression> &
+  ExpressionAttributeNames<ProjectionExpression> &
   ExpressionAttributeValues<KeyConditionExpression, Format> &
   ExpressionAttributeValues<FilterExpression, Format> & {
     KeyConditionExpression?: KeyConditionExpression;

diff --git a/test/v2-document.test.ts b/test/v2-document.test.ts
@@ -40,6 +40,24 @@ export async function foo(userId: string) {
     })
     .promise();
 
+  // using only projection
+  await table
+    .query({
+      TableName: "TableName",
+      AttributesToGet: ["attr"],
+      KeyConditionExpression: "key = :val",
+      FilterExpression: "key2 = :val2",
+      ProjectionExpression: "#key1",
+      ExpressionAttributeNames: {
+        "#key1": "",
+      },
+      ExpressionAttributeValues: {
+        ":val": "val",
+        ":val2": true,
+      },
+    })
+    .promise();
+
   if (response.Items) {
     response.Items[0].attr;
   }