Struct aws_sdk_dynamodb::operation::get_item::builders::GetItemFluentBuilder
source · pub struct GetItemFluentBuilder { /* private fields */ }
Expand description
Fluent builder constructing a request to GetItem
.
The GetItem
operation returns a set of attributes for the item with the given primary key. If there is no matching item, GetItem
does not return any data and there will be no Item
element in the response.
GetItem
provides an eventually consistent read by default. If your application requires a strongly consistent read, set ConsistentRead
to true
. Although a strongly consistent read might take more time than an eventually consistent read, it always returns the last updated value.
Implementations§
source§impl GetItemFluentBuilder
impl GetItemFluentBuilder
sourcepub fn as_input(&self) -> &GetItemInputBuilder
pub fn as_input(&self) -> &GetItemInputBuilder
Access the GetItem as a reference.
sourcepub async fn send(
self,
) -> Result<GetItemOutput, SdkError<GetItemError, HttpResponse>>
pub async fn send( self, ) -> Result<GetItemOutput, SdkError<GetItemError, HttpResponse>>
Sends the request and returns the response.
If an error occurs, an SdkError
will be returned with additional details that
can be matched against.
By default, any retryable failures will be retried twice. Retry behavior is configurable with the RetryConfig, which can be set when configuring the client.
sourcepub fn customize(
self,
) -> CustomizableOperation<GetItemOutput, GetItemError, Self>
pub fn customize( self, ) -> CustomizableOperation<GetItemOutput, GetItemError, Self>
Consumes this builder, creating a customizable operation that can be modified before being sent.
sourcepub fn table_name(self, input: impl Into<String>) -> Self
pub fn table_name(self, input: impl Into<String>) -> Self
The name of the table containing the requested item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.
sourcepub fn set_table_name(self, input: Option<String>) -> Self
pub fn set_table_name(self, input: Option<String>) -> Self
The name of the table containing the requested item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.
sourcepub fn get_table_name(&self) -> &Option<String>
pub fn get_table_name(&self) -> &Option<String>
The name of the table containing the requested item. You can also provide the Amazon Resource Name (ARN) of the table in this parameter.
sourcepub fn key(self, k: impl Into<String>, v: AttributeValue) -> Self
pub fn key(self, k: impl Into<String>, v: AttributeValue) -> Self
Adds a key-value pair to Key
.
To override the contents of this collection use set_key
.
A map of attribute names to AttributeValue
objects, representing the primary key of the item to retrieve.
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.
sourcepub fn set_key(self, input: Option<HashMap<String, AttributeValue>>) -> Self
pub fn set_key(self, input: Option<HashMap<String, AttributeValue>>) -> Self
A map of attribute names to AttributeValue
objects, representing the primary key of the item to retrieve.
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.
sourcepub fn get_key(&self) -> &Option<HashMap<String, AttributeValue>>
pub fn get_key(&self) -> &Option<HashMap<String, AttributeValue>>
A map of attribute names to AttributeValue
objects, representing the primary key of the item to retrieve.
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.
sourcepub fn attributes_to_get(self, input: impl Into<String>) -> Self
pub fn attributes_to_get(self, input: impl Into<String>) -> Self
Appends an item to AttributesToGet
.
To override the contents of this collection use set_attributes_to_get
.
This is a legacy parameter. Use ProjectionExpression
instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
sourcepub fn set_attributes_to_get(self, input: Option<Vec<String>>) -> Self
pub fn set_attributes_to_get(self, input: Option<Vec<String>>) -> Self
This is a legacy parameter. Use ProjectionExpression
instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
sourcepub fn get_attributes_to_get(&self) -> &Option<Vec<String>>
pub fn get_attributes_to_get(&self) -> &Option<Vec<String>>
This is a legacy parameter. Use ProjectionExpression
instead. For more information, see AttributesToGet in the Amazon DynamoDB Developer Guide.
sourcepub fn consistent_read(self, input: bool) -> Self
pub fn consistent_read(self, input: bool) -> Self
Determines the read consistency model: If set to true
, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
sourcepub fn set_consistent_read(self, input: Option<bool>) -> Self
pub fn set_consistent_read(self, input: Option<bool>) -> Self
Determines the read consistency model: If set to true
, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
sourcepub fn get_consistent_read(&self) -> &Option<bool>
pub fn get_consistent_read(&self) -> &Option<bool>
Determines the read consistency model: If set to true
, then the operation uses strongly consistent reads; otherwise, the operation uses eventually consistent reads.
sourcepub fn return_consumed_capacity(self, input: ReturnConsumedCapacity) -> Self
pub fn return_consumed_capacity(self, input: ReturnConsumedCapacity) -> Self
Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:
-
INDEXES
- The response includes the aggregateConsumedCapacity
for the operation, together withConsumedCapacity
for each table and secondary index that was accessed.Note that some operations, such as
GetItem
andBatchGetItem
, do not access any indexes at all. In these cases, specifyingINDEXES
will only returnConsumedCapacity
information for table(s). -
TOTAL
- The response includes only the aggregateConsumedCapacity
for the operation. -
NONE
- NoConsumedCapacity
details are included in the response.
sourcepub fn set_return_consumed_capacity(
self,
input: Option<ReturnConsumedCapacity>,
) -> Self
pub fn set_return_consumed_capacity( self, input: Option<ReturnConsumedCapacity>, ) -> Self
Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:
-
INDEXES
- The response includes the aggregateConsumedCapacity
for the operation, together withConsumedCapacity
for each table and secondary index that was accessed.Note that some operations, such as
GetItem
andBatchGetItem
, do not access any indexes at all. In these cases, specifyingINDEXES
will only returnConsumedCapacity
information for table(s). -
TOTAL
- The response includes only the aggregateConsumedCapacity
for the operation. -
NONE
- NoConsumedCapacity
details are included in the response.
sourcepub fn get_return_consumed_capacity(&self) -> &Option<ReturnConsumedCapacity>
pub fn get_return_consumed_capacity(&self) -> &Option<ReturnConsumedCapacity>
Determines the level of detail about either provisioned or on-demand throughput consumption that is returned in the response:
-
INDEXES
- The response includes the aggregateConsumedCapacity
for the operation, together withConsumedCapacity
for each table and secondary index that was accessed.Note that some operations, such as
GetItem
andBatchGetItem
, do not access any indexes at all. In these cases, specifyingINDEXES
will only returnConsumedCapacity
information for table(s). -
TOTAL
- The response includes only the aggregateConsumedCapacity
for the operation. -
NONE
- NoConsumedCapacity
details are included in the response.
sourcepub fn projection_expression(self, input: impl Into<String>) -> Self
pub fn projection_expression(self, input: impl Into<String>) -> Self
A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
If no attribute names are specified, then all attributes are returned. If any of the requested attributes are not found, they do not appear in the result.
For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn set_projection_expression(self, input: Option<String>) -> Self
pub fn set_projection_expression(self, input: Option<String>) -> Self
A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
If no attribute names are specified, then all attributes are returned. If any of the requested attributes are not found, they do not appear in the result.
For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn get_projection_expression(&self) -> &Option<String>
pub fn get_projection_expression(&self) -> &Option<String>
A string that identifies one or more attributes to retrieve from the table. These attributes can include scalars, sets, or elements of a JSON document. The attributes in the expression must be separated by commas.
If no attribute names are specified, then all attributes are returned. If any of the requested attributes are not found, they do not appear in the result.
For more information, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn expression_attribute_names(
self,
k: impl Into<String>,
v: impl Into<String>,
) -> Self
pub fn expression_attribute_names( self, k: impl Into<String>, v: impl Into<String>, ) -> Self
Adds a key-value pair to ExpressionAttributeNames
.
To override the contents of this collection use set_expression_attribute_names
.
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 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 on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn set_expression_attribute_names(
self,
input: Option<HashMap<String, String>>,
) -> Self
pub fn set_expression_attribute_names( self, input: Option<HashMap<String, String>>, ) -> Self
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 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 on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
sourcepub fn get_expression_attribute_names(&self) -> &Option<HashMap<String, String>>
pub fn get_expression_attribute_names(&self) -> &Option<HashMap<String, String>>
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 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 on expression attribute names, see Specifying Item Attributes in the Amazon DynamoDB Developer Guide.
Trait Implementations§
source§impl Clone for GetItemFluentBuilder
impl Clone for GetItemFluentBuilder
source§fn clone(&self) -> GetItemFluentBuilder
fn clone(&self) -> GetItemFluentBuilder
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreAuto Trait Implementations§
impl Freeze for GetItemFluentBuilder
impl !RefUnwindSafe for GetItemFluentBuilder
impl Send for GetItemFluentBuilder
impl Sync for GetItemFluentBuilder
impl Unpin for GetItemFluentBuilder
impl !UnwindSafe for GetItemFluentBuilder
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