Data.Argonaut.Decode.Struct.Tolerant.Combinators

getField :: forall a. DecodeJson a => Object Json -> String -> Either String a

Attempt to get the value for a given key on an Object Json.

Use this accessor if the key and value must be present in your object. If the key and value are optional, use getFieldOptional' (.::?) instead.

Operator alias for Data.Argonaut.Decode.Struct.Tolerant.Combinators.getField (non-associative / precedence 7)

getFieldOptional :: forall a. DecodeJson a => Object Json -> String -> Either String (Maybe a)

Attempt to get the value for a given key on an Object Json.

The result will be Right Nothing if the key and value are not present, but will fail if the key is present but the value cannot be converted to the right type.

This function will treat null as a value and attempt to decode it into your desired type. If you would like to treat null values the same as absent values, use getFieldOptional' (.::?) instead.

Operator alias for Data.Argonaut.Decode.Struct.Tolerant.Combinators.getFieldOptional (non-associative / precedence 7)

getFieldOptional' :: forall a. DecodeJson a => Object Json -> String -> Either String (Maybe a)

Attempt to get the value for a given key on an Object Json.

The result will be Right Nothing if the key and value are not present, or if the key is present and the value is null.

Use this accessor if the key and value are optional in your object. If the key and value are mandatory, use getField (.::) instead.

Operator alias for Data.Argonaut.Decode.Struct.Tolerant.Combinators.getFieldOptional' (non-associative / precedence 7)