Hi is there a way to override the body lens serialisation se kotlinlang #http4k

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Title

v

Volkan Nezir

07/09/2019, 1:55 PM

Hi - is there a way to override the body lens serialisation setting to not write empty lists as nulls?

Nulls.AS_EMPTY

d

dave

07/09/2019, 1:56 PM

you can define your own Jackson object using the template here:

object Jackson : ConfigurableJackson(KotlinModule()
    .asConfigurable()
    .withStandardMappings()
    .done()
    .disableDefaultTyping()
    .configure(FAIL_ON_UNKNOWN_PROPERTIES, false)
    .configure(FAIL_ON_IGNORED_PROPERTIES, false)
    .configure(USE_BIG_DECIMAL_FOR_FLOATS, true)
    .configure(USE_BIG_INTEGER_FOR_INTS, true)
)

(the last lines there are the Jackson mapper config)

(assuming Jackson)

v

Volkan Nezir

07/09/2019, 2:01 PM

yes correct - thank you. so if I include this definition, is this automatically picked up by http4k?

d

dave

07/09/2019, 2:03 PM

no - when you define your own Jackson instance you will need to import everything from there instead of from our Jackson

object MyJackson : ConfigurableJackson(KotlinModule()
    .asConfigurable()
    .withStandardMappings()
    .done()
    .disableDefaultTyping()
    .configure(FAIL_ON_UNKNOWN_PROPERTIES, false)
    .configure(FAIL_ON_IGNORED_PROPERTIES, false)
    .configure(USE_BIG_DECIMAL_FOR_FLOATS, true)
    .configure(USE_BIG_INTEGER_FOR_INTS, true)
)

then

import org.bob.MyJackson.auto

v

Volkan Nezir

07/09/2019, 2:06 PM

oh I see ok - thanks!

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