Struct aws_sdk_dynamodb::types::Projection

#[non_exhaustive]
pub struct Projection {
    pub projection_type: Option<ProjectionType>,
    pub non_key_attributes: Option<Vec<String>>,
}

Represents attributes that are copied (projected) from the table into an index. These are in addition to the primary key attributes and index key attributes, which are automatically projected.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

projection_type: Option<ProjectionType>

The set of attributes that are projected into the index:

• KEYS_ONLY - Only the index and primary keys are projected into the index.

• INCLUDE - In addition to the attributes described in KEYS_ONLY, the secondary index will include other non-key attributes that you specify.

• ALL - All of the table attributes are projected into the index.

When using the DynamoDB console, ALL is selected by default.

non_key_attributes: Option<Vec<String>>

Represents the non-key attribute names which will be projected into the index.

For local secondary indexes, the total count of NonKeyAttributes summed across all of the local secondary indexes, must not exceed 100. If you project the same attribute into two different indexes, this counts as two distinct attributes when determining the total.

Implementations

impl Projection

pub fn projection_type(&self) -> Option<&ProjectionType>

The set of attributes that are projected into the index:

• KEYS_ONLY - Only the index and primary keys are projected into the index.

• INCLUDE - In addition to the attributes described in KEYS_ONLY, the secondary index will include other non-key attributes that you specify.

• ALL - All of the table attributes are projected into the index.

When using the DynamoDB console, ALL is selected by default.

pub fn non_key_attributes(&self) -> &[String]

Represents the non-key attribute names which will be projected into the index.

For local secondary indexes, the total count of NonKeyAttributes summed across all of the local secondary indexes, must not exceed 100. If you project the same attribute into two different indexes, this counts as two distinct attributes when determining the total.

If no value was sent for this field, a default will be set. If you want to determine if no value was sent, use .non_key_attributes.is_none().

impl Projection

pub fn builder() -> ProjectionBuilder

Creates a new builder-style object to manufacture Projection.

Trait Implementations

impl Clone for Projection

fn clone(&self) -> Projection

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Projection

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for Projection

fn eq(&self, other: &Projection) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Projection