Amazon DynamoDB how to read populated Database in Golang? - amazon-web-services

Question

I have populated a local DynamoDB instance with some values from this JSON
[
{
"Id": 1,
"Type": "fruit",
"Name": "bananas",
"Price": 0.25
},
{
"Id": 2,
"Type": "fruit",
"Name": "apples",
"Price": 0.50
},
{
"Id": 3,
"Type": "fruit",
"Name": "avocados",
"Price": 1.25
},
{
"Id": 4,
"Type": "vegetable",
"Name": "carrots",
"Price": 1.00
} ]
And want to read, say all the items in this database. I believe Querying the database can do this, but in for my query input code I have
func main() {
type Product struct {
Id int `json:"Id"`
Type string `json:"Type"`
Name string `json:"Name"`
Price float64 `json:"Price"`
}
config := &aws.Config{
Region: aws.String("us-west-2"),
Endpoint: aws.String("http://localhost:8000"),
}
sess := session.Must(session.NewSession(config))
svc := dynamodb.New(sess)
input := &dynamodb.QueryInput{
TableName: aws.String("Products"),
KeyConditions: map[string]*dynamodb.Condition{
"Id": {
ComparisonOperator: aws.String("EQ"),
AttributeValueList: []*dynamodb.AttributeValue{
{
N: aws.String("1"),
},
},
},
},
}
result, err := svc.Query(input)
if err != nil {
fmt.Println(err.Error())
return
}
var products []Product
err = dynamodbattribute.UnmarshalListOfMaps(result.Items, &products)
// print the response data
for _, m := range products {
fmt.Printf("Product: '%s' (%f)\n", m.Name, m.Price)
}
}
so far and it only outputs bananas as the since the query is trying to match id = 1 (Id is my hash primary key).
I tried to modify the keycondition to something like this instead
"Id": {
ComparisonOperator: aws.String("BETWEEN"),
AttributeValueList: []*dynamodb.AttributeValue{
{
N: aws.String("0"),
},
{
N: aws.String("5"),
},
},
},
in an attempt to read every item but it says "ValidationException: Query key condition not supported". Am I doing the query statement incorrectly? Or is there some better way of listing items in dynamoDB? (Like if I wanted to list everything with "Type" == "fruit" for example, then output the first 3 items in the database.