/
api_op_UpdateItem.go
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/
api_op_UpdateItem.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package dynamodb
import (
"context"
"fmt"
awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/aws-sdk-go-v2/service/dynamodb/types"
internalEndpointDiscovery "github.com/aws/aws-sdk-go-v2/service/internal/endpoint-discovery"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// Edits an existing item's attributes, or adds a new item to the table if it does
// not already exist. You can put, delete, or add attribute values. You can also
// perform a conditional update on an existing item (insert a new attribute
// name-value pair if it doesn't exist, or replace an existing name-value pair if
// it has certain expected attribute values). You can also return the item's
// attribute values in the same UpdateItem operation using the ReturnValues
// parameter.
func (c *Client) UpdateItem(ctx context.Context, params *UpdateItemInput, optFns ...func(*Options)) (*UpdateItemOutput, error) {
if params == nil {
params = &UpdateItemInput{}
}
result, metadata, err := c.invokeOperation(ctx, "UpdateItem", params, optFns, c.addOperationUpdateItemMiddlewares)
if err != nil {
return nil, err
}
out := result.(*UpdateItemOutput)
out.ResultMetadata = metadata
return out, nil
}
// Represents the input of an UpdateItem operation.
type UpdateItemInput struct {
// The primary key of the item to be updated. Each element consists of an
// attribute name and a value for that attribute. For the primary key, you must
// provide all of the attributes. For example, with a simple primary key, you only
// need to provide a value for the partition key. For a composite primary key, you
// must provide values for both the partition key and the sort key.
//
// This member is required.
Key map[string]types.AttributeValue
// The name of the table containing the item to update. You can also provide the
// Amazon Resource Name (ARN) of the table in this parameter.
//
// This member is required.
TableName *string
// This is a legacy parameter. Use UpdateExpression instead. For more information,
// see AttributeUpdates (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.AttributeUpdates.html)
// in the Amazon DynamoDB Developer Guide.
AttributeUpdates map[string]types.AttributeValueUpdate
// A condition that must be satisfied in order for a conditional update to
// succeed. An expression can contain any of the following:
// - Functions: attribute_exists | attribute_not_exists | attribute_type |
// contains | begins_with | size These function names are case-sensitive.
// - Comparison operators: = | <> | < | > | <= | >= | BETWEEN | IN
// - Logical operators: AND | OR | NOT
// For more information about condition expressions, see Specifying Conditions (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
// in the Amazon DynamoDB Developer Guide.
ConditionExpression *string
// This is a legacy parameter. Use ConditionExpression instead. For more
// information, see ConditionalOperator (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.ConditionalOperator.html)
// in the Amazon DynamoDB Developer Guide.
ConditionalOperator types.ConditionalOperator
// This is a legacy parameter. Use ConditionExpression instead. For more
// information, see Expected (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/LegacyConditionalParameters.Expected.html)
// in the Amazon DynamoDB Developer Guide.
Expected map[string]types.ExpectedAttributeValue
// One or more substitution tokens for attribute names in an expression. The
// following are some use cases for using ExpressionAttributeNames :
// - To access an attribute whose name conflicts with a DynamoDB reserved word.
// - To create a placeholder for repeating occurrences of an attribute name in
// an expression.
// - To prevent special characters in an attribute name from being
// misinterpreted in an expression.
// Use the # character in an expression to dereference an attribute name. For
// example, consider the following attribute name:
// - Percentile
// The name of this attribute conflicts with a reserved word, so it cannot be used
// directly in an expression. (For the complete list of reserved words, see
// Reserved Words (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ReservedWords.html)
// in the Amazon DynamoDB Developer Guide.) To work around this, you could specify
// the following for ExpressionAttributeNames :
// - {"#P":"Percentile"}
// You could then use this substitution in an expression, as in this example:
// - #P = :val
// Tokens that begin with the : character are expression attribute values, which
// are placeholders for the actual value at runtime. For more information about
// expression attribute names, see Specifying Item Attributes (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.AccessingItemAttributes.html)
// in the Amazon DynamoDB Developer Guide.
ExpressionAttributeNames map[string]string
// One or more values that can be substituted in an expression. Use the : (colon)
// character in an expression to dereference an attribute value. For example,
// suppose that you wanted to check whether the value of the ProductStatus
// attribute was one of the following: Available | Backordered | Discontinued You
// would first need to specify ExpressionAttributeValues as follows: {
// ":avail":{"S":"Available"}, ":back":{"S":"Backordered"},
// ":disc":{"S":"Discontinued"} } You could then use these values in an expression,
// such as this: ProductStatus IN (:avail, :back, :disc) For more information on
// expression attribute values, see Condition Expressions (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.SpecifyingConditions.html)
// in the Amazon DynamoDB Developer Guide.
ExpressionAttributeValues map[string]types.AttributeValue
// Determines the level of detail about either provisioned or on-demand throughput
// consumption that is returned in the response:
// - INDEXES - The response includes the aggregate ConsumedCapacity for the
// operation, together with ConsumedCapacity for each table and secondary index
// that was accessed. Note that some operations, such as GetItem and BatchGetItem
// , do not access any indexes at all. In these cases, specifying INDEXES will
// only return ConsumedCapacity information for table(s).
// - TOTAL - The response includes only the aggregate ConsumedCapacity for the
// operation.
// - NONE - No ConsumedCapacity details are included in the response.
ReturnConsumedCapacity types.ReturnConsumedCapacity
// Determines whether item collection metrics are returned. If set to SIZE , the
// response includes statistics about item collections, if any, that were modified
// during the operation are returned in the response. If set to NONE (the
// default), no statistics are returned.
ReturnItemCollectionMetrics types.ReturnItemCollectionMetrics
// Use ReturnValues if you want to get the item attributes as they appear before
// or after they are successfully updated. For UpdateItem , the valid values are:
// - NONE - If ReturnValues is not specified, or if its value is NONE , then
// nothing is returned. (This setting is the default for ReturnValues .)
// - ALL_OLD - Returns all of the attributes of the item, as they appeared before
// the UpdateItem operation.
// - UPDATED_OLD - Returns only the updated attributes, as they appeared before
// the UpdateItem operation.
// - ALL_NEW - Returns all of the attributes of the item, as they appear after
// the UpdateItem operation.
// - UPDATED_NEW - Returns only the updated attributes, as they appear after the
// UpdateItem operation.
// There is no additional cost associated with requesting a return value aside
// from the small network and processing overhead of receiving a larger response.
// No read capacity units are consumed. The values returned are strongly
// consistent.
ReturnValues types.ReturnValue
// An optional parameter that returns the item attributes for an UpdateItem
// operation that failed a condition check. There is no additional cost associated
// with requesting a return value aside from the small network and processing
// overhead of receiving a larger response. No read capacity units are consumed.
ReturnValuesOnConditionCheckFailure types.ReturnValuesOnConditionCheckFailure
// An expression that defines one or more attributes to be updated, the action to
// be performed on them, and new values for them. The following action values are
// available for UpdateExpression .
// - SET - Adds one or more attributes and values to an item. If any of these
// attributes already exist, they are replaced by the new values. You can also use
// SET to add or subtract from an attribute that is of type Number. For example:
// SET myNum = myNum + :val SET supports the following functions:
// - if_not_exists (path, operand) - if the item does not contain an attribute at
// the specified path, then if_not_exists evaluates to operand; otherwise, it
// evaluates to path. You can use this function to avoid overwriting an attribute
// that may already be present in the item.
// - list_append (operand, operand) - evaluates to a list with a new element
// added to it. You can append the new element to the start or the end of the list
// by reversing the order of the operands. These function names are
// case-sensitive.
// - REMOVE - Removes one or more attributes from an item.
// - ADD - Adds the specified value to the item, if the attribute does not
// already exist. If the attribute does exist, then the behavior of ADD depends
// on the data type of the attribute:
// - If the existing attribute is a number, and if Value is also a number, then
// Value is mathematically added to the existing attribute. If Value is a
// negative number, then it is subtracted from the existing attribute. If you use
// ADD to increment or decrement a number value for an item that doesn't exist
// before the update, DynamoDB uses 0 as the initial value. Similarly, if you use
// ADD for an existing item to increment or decrement an attribute value that
// doesn't exist before the update, DynamoDB uses 0 as the initial value. For
// example, suppose that the item you want to update doesn't have an attribute
// named itemcount , but you decide to ADD the number 3 to this attribute anyway.
// DynamoDB will create the itemcount attribute, set its initial value to 0 , and
// finally add 3 to it. The result will be a new itemcount attribute in the item,
// with a value of 3 .
// - If the existing data type is a set and if Value is also a set, then Value is
// added to the existing set. For example, if the attribute value is the set
// [1,2] , and the ADD action specified [3] , then the final attribute value is
// [1,2,3] . An error occurs if an ADD action is specified for a set attribute
// and the attribute type specified does not match the existing set type. Both sets
// must have the same primitive data type. For example, if the existing data type
// is a set of strings, the Value must also be a set of strings. The ADD action
// only supports Number and set data types. In addition, ADD can only be used on
// top-level attributes, not nested attributes.
// - DELETE - Deletes an element from a set. If a set of values is specified,
// then those values are subtracted from the old set. For example, if the attribute
// value was the set [a,b,c] and the DELETE action specifies [a,c] , then the
// final attribute value is [b] . Specifying an empty set is an error. The DELETE
// action only supports set data types. In addition, DELETE can only be used on
// top-level attributes, not nested attributes.
// You can have many actions in a single expression, such as the following: SET
// a=:value1, b=:value2 DELETE :value3, :value4, :value5 For more information on
// update expressions, see Modifying Items and Attributes (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.Modifying.html)
// in the Amazon DynamoDB Developer Guide.
UpdateExpression *string
noSmithyDocumentSerde
}
// Represents the output of an UpdateItem operation.
type UpdateItemOutput struct {
// A map of attribute values as they appear before or after the UpdateItem
// operation, as determined by the ReturnValues parameter. The Attributes map is
// only present if the update was successful and ReturnValues was specified as
// something other than NONE in the request. Each element represents one attribute.
Attributes map[string]types.AttributeValue
// The capacity units consumed by the UpdateItem operation. The data returned
// includes the total provisioned throughput consumed, along with statistics for
// the table and any indexes involved in the operation. ConsumedCapacity is only
// returned if the ReturnConsumedCapacity parameter was specified. For more
// information, see Provisioned Throughput (https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ProvisionedThroughput.html#ItemSizeCalculations.Reads)
// in the Amazon DynamoDB Developer Guide.
ConsumedCapacity *types.ConsumedCapacity
// Information about item collections, if any, that were affected by the UpdateItem
// operation. ItemCollectionMetrics is only returned if the
// ReturnItemCollectionMetrics parameter was specified. If the table does not have
// any local secondary indexes, this information is not returned in the response.
// Each ItemCollectionMetrics element consists of:
// - ItemCollectionKey - The partition key value of the item collection. This is
// the same as the partition key value of the item itself.
// - SizeEstimateRangeGB - An estimate of item collection size, in gigabytes.
// This value is a two-element array containing a lower bound and an upper bound
// for the estimate. The estimate includes the size of all the items in the table,
// plus the size of all attributes projected into all of the local secondary
// indexes on that table. Use this estimate to measure whether a local secondary
// index is approaching its size limit. The estimate is subject to change over
// time; therefore, do not rely on the precision or accuracy of the estimate.
ItemCollectionMetrics *types.ItemCollectionMetrics
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationUpdateItemMiddlewares(stack *middleware.Stack, options Options) (err error) {
if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
return err
}
err = stack.Serialize.Add(&awsAwsjson10_serializeOpUpdateItem{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsAwsjson10_deserializeOpUpdateItem{}, middleware.After)
if err != nil {
return err
}
if err := addProtocolFinalizerMiddlewares(stack, options, "UpdateItem"); err != nil {
return fmt.Errorf("add protocol finalizers: %v", err)
}
if err = addlegacyEndpointContextSetter(stack, options); err != nil {
return err
}
if err = addSetLoggerMiddleware(stack, options); err != nil {
return err
}
if err = addClientRequestID(stack); err != nil {
return err
}
if err = addComputeContentLength(stack); err != nil {
return err
}
if err = addResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = addComputePayloadSHA256(stack); err != nil {
return err
}
if err = addRetry(stack, options); err != nil {
return err
}
if err = addRawResponseToMetadata(stack); err != nil {
return err
}
if err = addRecordResponseTiming(stack); err != nil {
return err
}
if err = addClientUserAgent(stack, options); err != nil {
return err
}
if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = addOpUpdateItemDiscoverEndpointMiddleware(stack, options, c); err != nil {
return err
}
if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
return err
}
if err = addOpUpdateItemValidationMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opUpdateItem(options.Region), middleware.Before); err != nil {
return err
}
if err = addRecursionDetection(stack); err != nil {
return err
}
if err = addRequestIDRetrieverMiddleware(stack); err != nil {
return err
}
if err = addResponseErrorMiddleware(stack); err != nil {
return err
}
if err = addValidateResponseChecksum(stack, options); err != nil {
return err
}
if err = addAcceptEncodingGzip(stack, options); err != nil {
return err
}
if err = addRequestResponseLogging(stack, options); err != nil {
return err
}
if err = addDisableHTTPSMiddleware(stack, options); err != nil {
return err
}
return nil
}
func addOpUpdateItemDiscoverEndpointMiddleware(stack *middleware.Stack, o Options, c *Client) error {
return stack.Finalize.Insert(&internalEndpointDiscovery.DiscoverEndpoint{
Options: []func(*internalEndpointDiscovery.DiscoverEndpointOptions){
func(opt *internalEndpointDiscovery.DiscoverEndpointOptions) {
opt.DisableHTTPS = o.EndpointOptions.DisableHTTPS
opt.Logger = o.Logger
},
},
DiscoverOperation: c.fetchOpUpdateItemDiscoverEndpoint,
EndpointDiscoveryEnableState: o.EndpointDiscovery.EnableEndpointDiscovery,
EndpointDiscoveryRequired: false,
Region: o.Region,
}, "ResolveEndpointV2", middleware.After)
}
func (c *Client) fetchOpUpdateItemDiscoverEndpoint(ctx context.Context, region string, optFns ...func(*internalEndpointDiscovery.DiscoverEndpointOptions)) (internalEndpointDiscovery.WeightedAddress, error) {
input := getOperationInput(ctx)
in, ok := input.(*UpdateItemInput)
if !ok {
return internalEndpointDiscovery.WeightedAddress{}, fmt.Errorf("unknown input type %T", input)
}
_ = in
identifierMap := make(map[string]string, 0)
identifierMap["sdk#Region"] = region
key := fmt.Sprintf("DynamoDB.%v", identifierMap)
if v, ok := c.endpointCache.Get(key); ok {
return v, nil
}
discoveryOperationInput := &DescribeEndpointsInput{}
opt := internalEndpointDiscovery.DiscoverEndpointOptions{}
for _, fn := range optFns {
fn(&opt)
}
go c.handleEndpointDiscoveryFromService(ctx, discoveryOperationInput, region, key, opt)
return internalEndpointDiscovery.WeightedAddress{}, nil
}
func newServiceMetadataMiddleware_opUpdateItem(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
OperationName: "UpdateItem",
}
}