Fetch Items from NoSQL Table

Catalyst enables you to fetch items from a NoSQL table by identifying them with their primary keys. For instance, you can use just the partition key or a combination of the partition key and sort key to fetch the item. You can also optionally filter the attributes to be fetched by specifying the required attributes.

The example below illustrates fetching an item identified by its partition key fruit and the sort key location using fetch_item(). Specific attributes such as properties and taste are filtered to be fetched using required_objects.

# Fetch properties of a NoSQLItem identified with the partition key and sort key
res = table.fetch_item({
   "keys": [
    {
     "fruit": {
      "S": "apple"
     },
     "location: {
      "S": "USA"
     }
    }
  ],
# Specify the attributes to be fetched
   'required_objects': ["properties", "taste"] 
 })
print(res)