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example_aws-dynamodb_update-item-set.go
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example_aws-dynamodb_update-item-set.go
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package main
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/dynamodb"
"github.com/aws/aws-sdk-go/service/dynamodb/expression"
"github.com/btnguyen2k/prom"
"math/rand"
"time"
)
func main() {
rand.Seed(time.Now().UnixNano())
adc := createAwsDynamodbConnect("ap-southeast-1")
defer adc.Close()
item := map[string]*dynamodb.AttributeValue{
"username": {S: aws.String("user-update")},
"email": {S: aws.String("user-update@test.com")},
"an": {
NS: []*string{aws.String("1"), aws.String("2"), aws.String("3")},
},
"as": {
SS: []*string{aws.String("1"), aws.String("2"), aws.String("3")},
},
"m": {M: map[string]*dynamodb.AttributeValue{}},
"a": {L: []*dynamodb.AttributeValue{}},
}
keyFilter := map[string]interface{}{"username": "user-update"}
key := make(map[string]*dynamodb.AttributeValue)
for k, v := range keyFilter {
key[k] = prom.AwsDynamodbToAttributeValue(v)
}
{
fmt.Println("-== Add Values to Item Attributes ==-")
fmt.Printf(" Inserting item: %s\n", toJsonDynamodb(item))
_, err := adc.PutItemRaw(nil, "test1", item, nil)
if err != nil {
fmt.Printf(" Error: %e\n", err)
}
attrsAndValues := map[string]interface{}{"an": 8, "as": []string{"9", "10"}}
condition := expression.Name("username").Equal(expression.Value("user-update"))
dbresult, err := adc.AddValuesToSet(nil, "test1", keyFilter, &condition, attrsAndValues)
fmt.Printf(" Adding values to attributes: %v - %e\n", dbresult, err)
dbitem, err := adc.GetItem(nil, "test1", keyFilter)
if err != nil {
fmt.Printf(" Error getting item: %e\n", err)
} else {
fmt.Printf(" Item after update: %s\n", toJsonDynamodb(dbitem))
}
fmt.Println(awsDynamodbSep)
}
{
fmt.Println("-== Delete Values from Item Attributes ==-")
fmt.Printf(" Inserting item: %s\n", toJsonDynamodb(item))
_, err := adc.PutItemRaw(nil, "test1", item, nil)
if err != nil {
fmt.Printf(" Error: %e\n", err)
}
attrsAndValues := map[string]interface{}{"an": []int{1, 2}, "as": []string{"3"}}
condition := expression.Name("username").Equal(expression.Value("user-update"))
dbresult, err := adc.DeleteValuesFromAttributes(nil, "test1", keyFilter, &condition, attrsAndValues)
fmt.Printf(" Deleting values from attributes: %v - %e\n", dbresult, err)
dbitem, err := adc.GetItem(nil, "test1", keyFilter)
if err != nil {
fmt.Printf(" Error getting item: %e\n", err)
} else {
fmt.Printf(" Item after update: %s\n", toJsonDynamodb(dbitem))
}
fmt.Println(awsDynamodbSep)
}
}