meteor.Expression
See theExpression companion object
case class Expression(expression: String, attributeNames: Map[String, String], attributeValues: Map[String, AttributeValue])
Abstraction over DynamoDB expressions, this can be key condition expression, update expression, projection expression etc.. https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/Expressions.html.
It is recommended to avoid DynamoDB's reserved words in expression string by providing expression as raw String with attribute names and values as placeholders only. Attribute names and values can then be replaced separately via attributeNames and attributeValues maps.
Example:
import meteor.Expression
import meteor.syntax._
Expression(
"#b = :my_bool and #i > :my_int",
Map("#b" -> "my_bool_attribute_name", "#i" -> "my_int_attribute_name"),
Map(
":my_bool" -> true.asAttributeValue,
":my_int" -> 0.asAttributeValue
)
)
Value parameters
- attributeNames
-
a map of attribute name placeholders in the raw String above to the actual attribute names in the table
- attributeValues
-
a map of attribute value placeholders in the raw String above to the actual attribute values
- expression
-
expression as raw String
Attributes
- Companion
- object
- Graph
-
- Supertypes
-
trait Serializabletrait Producttrait Equalsclass Objecttrait Matchableclass Any
Members list
In this article