Copyright	(c) 2013-2021 Brendan Hay
License	Mozilla Public License, v. 2.0.
Maintainer	Brendan Hay <brendan.g.hay+amazonka@gmail.com>
Stability	auto-generated
Portability	non-portable (GHC extensions)
Safe Haskell	None

Amazonka.SDB.Types.UpdateCondition

Description

Synopsis

data UpdateCondition = UpdateCondition' {
- exists :: Maybe Bool
- value :: Maybe Text
- name :: Maybe Text
}
newUpdateCondition :: UpdateCondition
updateCondition_exists :: Lens' UpdateCondition (Maybe Bool)
updateCondition_value :: Lens' UpdateCondition (Maybe Text)
updateCondition_name :: Lens' UpdateCondition (Maybe Text)

Documentation

data UpdateCondition Source #

Specifies the conditions under which data should be updated. If an update condition is specified for a request, the data will only be updated if the condition is satisfied. For example, if an attribute with a specific name and value exists, or if a specific attribute doesn't exist.

See: newUpdateCondition smart constructor.

Constructors

UpdateCondition'

Fields

exists :: Maybe Bool
A value specifying whether or not the specified attribute must exist with the specified value in order for the update condition to be satisfied. Specify true if the attribute must exist for the update condition to be satisfied. Specify false if the attribute should not exist in order for the update condition to be satisfied.
value :: Maybe Text
The value of an attribute. This value can only be specified when the Exists parameter is equal to true.
name :: Maybe Text
The name of the attribute involved in the condition.

Instances

Instances details

Eq UpdateCondition Source #
Instance details Defined in Amazonka.SDB.Types.UpdateCondition Methods (==) :: UpdateCondition -> UpdateCondition -> Bool # (/=) :: UpdateCondition -> UpdateCondition -> Bool #
Read UpdateCondition Source #
Instance details Defined in Amazonka.SDB.Types.UpdateCondition Methods readsPrec :: Int -> ReadS UpdateCondition # readList :: ReadS [UpdateCondition] # readPrec :: ReadPrec UpdateCondition # readListPrec :: ReadPrec [UpdateCondition] #
Show UpdateCondition Source #
Instance details Defined in Amazonka.SDB.Types.UpdateCondition Methods showsPrec :: Int -> UpdateCondition -> ShowS # show :: UpdateCondition -> String # showList :: [UpdateCondition] -> ShowS #
Generic UpdateCondition Source #
Instance details Defined in Amazonka.SDB.Types.UpdateCondition Associated Types type Rep UpdateCondition :: Type -> Type # Methods from :: UpdateCondition -> Rep UpdateCondition x # to :: Rep UpdateCondition x -> UpdateCondition #
NFData UpdateCondition Source #
Instance details Defined in Amazonka.SDB.Types.UpdateCondition Methods rnf :: UpdateCondition -> () #
Hashable UpdateCondition Source #
Instance details Defined in Amazonka.SDB.Types.UpdateCondition Methods hashWithSalt :: Int -> UpdateCondition -> Int # hash :: UpdateCondition -> Int #
ToQuery UpdateCondition Source #
Instance details Defined in Amazonka.SDB.Types.UpdateCondition Methods toQuery :: UpdateCondition -> QueryString #
type Rep UpdateCondition Source #
Instance details Defined in Amazonka.SDB.Types.UpdateCondition type Rep UpdateCondition = D1 ('MetaData "UpdateCondition" "Amazonka.SDB.Types.UpdateCondition" "libZSservicesZSamazonka-sdbZSamazonka-sdb" 'False) (C1 ('MetaCons "UpdateCondition'" 'PrefixI 'True) (S1 ('MetaSel ('Just "exists") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe Bool)) :: (S1 ('MetaSel ('Just "value") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe Text)) :: S1 ('MetaSel ('Just "name") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedStrict) (Rec0 (Maybe Text)))))

newUpdateCondition :: UpdateCondition Source #

Create a value of UpdateCondition with all optional fields omitted.

Use generic-lens or optics to modify other optional fields.

The following record fields are available, with the corresponding lenses provided for backwards compatibility:

$sel:exists:UpdateCondition', updateCondition_exists - A value specifying whether or not the specified attribute must exist with the specified value in order for the update condition to be satisfied. Specify true if the attribute must exist for the update condition to be satisfied. Specify false if the attribute should not exist in order for the update condition to be satisfied.

$sel:value:UpdateCondition', updateCondition_value - The value of an attribute. This value can only be specified when the Exists parameter is equal to true.

$sel:name:UpdateCondition', updateCondition_name - The name of the attribute involved in the condition.

updateCondition_exists :: Lens' UpdateCondition (Maybe Bool) Source #

A value specifying whether or not the specified attribute must exist with the specified value in order for the update condition to be satisfied. Specify true if the attribute must exist for the update condition to be satisfied. Specify false if the attribute should not exist in order for the update condition to be satisfied.

updateCondition_value :: Lens' UpdateCondition (Maybe Text) Source #

The value of an attribute. This value can only be specified when the Exists parameter is equal to true.

updateCondition_name :: Lens' UpdateCondition (Maybe Text) Source #

The name of the attribute involved in the condition.