Cannot call toArray() on QueryIterator using #azure/cosmos NPM - node.js

Question

I'm querying a local emulated Cosmos DB instance using the JS #azure/cosmos package. I'm using version 3.1.1 (according to the package-lock.json) and I cannot call the toArray() function on the items for a container.
let databaseID = "database";
let collectionID = "collection";
const endpoint = "https://localhost:8081";
const key = "C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==";
const client = new CosmosClient({
endpoint,
key,
agent: new https.Agent({
rejectUnauthorized: false
})
});
let database = await client.databases.createIfNotExists({ id: databaseID });
let container = await database.containers.createIfNotExists({id: collectionID});
let items = container.items;
let readItems = items.readAll(); // crash
I get this crash:
UnhandledPromiseRejectionWarning: TypeError: container.items.readAll(...).toArray is not a function
The samples say I should be able to do this but I can't see the toArray() function in the official documentation. Interestingly toArray()is mentioned in the documentdb documentation. Maybe this function hasn't be re-implemented, or am I doing something wrong?

Answer 1

toArray() listed in the official github source code clearly,so i think it is supported.
const { result: results } = await container.items.query(querySpec).toArray();
if (results.length == 0) {
throw "No items found matching";
} else if (results.length > 1) {
throw "More than 1 item found matching";
}
I would suggest you putting the readAll() in the async function and use with await.(Follow this thread:Cosmos DB Query Works in Data Explorer But Not Node.js)
My sample code:
const cosmos = require('#azure/cosmos');
const CosmosClient = cosmos.CosmosClient;
const endpoint = "https://***.documents.azure.com:443/"; // Add your endpoint
const key = "***"; // Add the masterkey of the endpoint
const client = new CosmosClient({
endpoint,
key
});
const databaseId = "db";
const containerId = "coll";
async function run() {
const { container, database } = await init();
const querySpec = {
query: "SELECT r.id,r._ts FROM root r"
};
const queryOptions = {
maxItemCount : -1
}
const { result: results } = await container.items.query(querySpec).toArray();
if (results.length == 0) {
throw "No items found matching";
} else if (results.length > 1) {
throw "More than 1 item found matching";
}
}
async function init() {
const { database } = await client.databases.createIfNotExists({ id: databaseId });
const { container } = await database.containers.createIfNotExists({ id: containerId });
return { database, container };
}
run().catch(err => {
console.error(err);
});
Update Answer:
I have to say sorry that i'm mislead by the MS official document.If i navigate to Query Documents github source code by the link in the MS document:
I could found such sample code :
However, that's the master branch! Not the latest 3.1.1 version! If i switch the version at the same above page,it shows 404:https://github.com/Azure/azure-cosmos-js/blob/v3.1.1/samples/ItemManagement/app.js
More evidence, some comments:
So i believe that the #azure/cosmos V3 has been updated many things(such as toArray() method has been dropped),meanwhile the official link has not been updated.
Now,as you mentioned in your question,you could use fetchAll() to get the array of results:
const { resources: items } = await container.items.query(querySpec).fetchAll();
console.log(items)
Output:
If any more concern,please let me know.