This is a feature of the code that is processing the request

Question

This is a feature of the code that is processing the request body Assuming you are using json and Jackson you can do this by making the relevant field not nullable or by setting the relevant options in jackson

Elizabeth Thomas · Answer

My field is defined as not nullable but still in the OpenAPI Spec generated the component object comes back with `required` attribute as ` ` I tried setting ` JsonProperty required = true ` on the field as well but still no luck Would you have other thoughts

Elizabeth Thomas · Answer

< dave> or < James Richardson>

dave · Answer

The annotation won t affect the ooenapi

dave · Answer

If the dto is Kotlin and you re using Jackson it should just work

dave · Answer

the only way we can help beyond that is for you to create a Gist or similar which recreates the problem

James Richardson · Answer

Sorry I can t help with the openapi stuff I dont really use it

Elizabeth Thomas · Answer

< dave> Here is a slimmed down version of my issue using the example given in ```data class SumResult val sum Int val sumResponseBody = Body auto lt SumResult gt toLens fun main args Array lt String gt fun add value1 Int value2 Int HttpHandler = Response OK with sumResponseBody of SumResult value1 + value2 val filter Filter = ResponseFilters ReportHttpTransaction Clock systemUTC tx HttpTransaction gt println tx labels toString + took + tx duration val mySecurity = ApiKeySecurity required apiKey it == 42 val contract = contract renderer = OpenApi3 ApiInfo my great api v1 0 OpenApiJackson emptyList OpenApi3ApiRenderer OpenApiJackson descriptionPath = docs swagger json security = mySecurity routes += add of value1 of value2 meta summary = add description = Adds 2 numbers together returning OK sumResponseBody to SumResult 55 bindContract Method GET to add val handler = routes context bind filter then contract bind contract renderer = OpenApi3 ApiInfo my great super api v1 0 OpenApiJackson emptyList OpenApi3ApiRenderer OpenApiJackson ServerFilters Cors CorsPolicy UnsafeGlobalPermissive then handler asServer Jetty 8000 start ```

Elizabeth Thomas · Answer

When I run `localhost 8080 context docs swagger json` on my browser or curl command the output I get is this ``` openapi 3 0 0 info title my great api version v1 0 description tags paths context add value1 value2 get summary add description Adds 2 numbers together tags context parameters schema type integer in path name value1 required true description null schema type integer in path name value2 required true description null responses 200 description OK content application json example sum 55 schema $ref components schemas object 1725201476 security api key operationId getContextAdd value1 value2 deprecated false components schemas object 1725201476 type object required properties sum type integer example 55 securitySchemes api key type apiKey in query name apiKey ```

Elizabeth Thomas · Answer

If you notice under the `components schemas object 1725201476` `required` comes back as ` ` even though my data class `SumResult` has `sum` property as not nullable

Elizabeth Thomas · Answer

My object mappers are defined as below ```object ObjectMappers val snakeCaseMapper ObjectMapper get = createMapper fun createMapper namingStrategy PropertyNamingStrategy = PropertyNamingStrategy SNAKE CASE ObjectMapper = ObjectMapper findAndRegisterModules configure SerializationFeature WRITE DATES AS TIMESTAMPS false configure DeserializationFeature ADJUST DATES TO CONTEXT TIME ZONE false configure DeserializationFeature FAIL ON UNKNOWN PROPERTIES false configure DeserializationFeature READ UNKNOWN ENUM VALUES AS NULL true configure MapperFeature SORT PROPERTIES ALPHABETICALLY true configure SerializationFeature ORDER MAP ENTRIES BY KEYS true setPropertyNamingStrategy namingStrategy object OpenApiJackson ConfigurableJackson ObjectMappers snakeCaseMapper ```

Elizabeth Thomas · Answer

Am I missing anything here How can I get the `required` field to be filled with non nullable properties of my response object in my example

dave · Answer

you need the Kotlin module at least in order to pick up the nullability

dave · Answer

you should base your mapper from this ```object Jackson ConfigurableJackson KotlinModule asConfigurable withStandardMappings done deactivateDefaultTyping 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 ```

Elizabeth Thomas · Answer

Okay let me try with this

Elizabeth Thomas · Answer

I used the mapper from your snippet but still same response `required` comes back as ` ` in the component schema objects

dave · Answer

did you replace the Body auto import

Elizabeth Thomas · Answer

Yes But still same response

dave · Answer

you re using OpenApiJackson to render the output

dave · Answer

how is that defined

dave · Answer

it s that instance which will determine the null nonnull

dave · Answer

you should use the same Jackson for both things not doing so will lead to bad times and sad faces

Elizabeth Thomas · Answer

I am using the same jackson everywhere Here it is ```object Jackson ConfigurableJackson KotlinModule asConfigurable withStandardMappings done deactivateDefaultTyping configure DeserializationFeature FAIL ON UNKNOWN PROPERTIES false configure DeserializationFeature FAIL ON IGNORED PROPERTIES false configure DeserializationFeature USE BIG DECIMAL FOR FLOATS true configure DeserializationFeature USE BIG INTEGER FOR INTS true ```

Elizabeth Thomas · Answer

```package com test openapi import com test openapi Jackson auto import org http4k contract contract import org http4k contract div import org http4k contract meta import org http4k contract openapi ApiInfo import org http4k contract openapi v3 OpenApi3 import org http4k contract openapi v3 OpenApi3ApiRenderer import org http4k contract security ApiKeySecurity import org http4k core Body import org http4k core Filter import org http4k core HttpHandler import org http4k core HttpTransaction import org http4k core Method import org http4k core Response import org http4k core Status Companion OK import org http4k core then import org http4k core with import org http4k filter CorsPolicy import org http4k filter ResponseFilters import org http4k filter ServerFilters import org http4k lens Path import org http4k lens Query import import org http4k routing bind import org http4k routing routes import org http4k server Jetty import org http4k server asServer import java time Clock class App val greeting String get return Hello world data class SumResult val sum Int val sumResponseBody = Body auto lt SumResult gt toLens fun main args Array lt String gt fun add value1 Int value2 Int HttpHandler = Response OK with sumResponseBody of SumResult value1 + value2 val filter Filter = ResponseFilters ReportHttpTransaction Clock systemUTC tx HttpTransaction gt println tx labels toString + took + tx duration val mySecurity = ApiKeySecurity required apiKey it == 42 val contract = contract renderer = OpenApi3 ApiInfo my great api v1 0 Jackson emptyList OpenApi3ApiRenderer Jackson descriptionPath = docs swagger json security = mySecurity routes += add of value1 of value2 meta summary = add description = Adds 2 numbers together returning OK sumResponseBody to SumResult 55 bindContract Method GET to add val handler = routes context bind filter then contract bind contract renderer = OpenApi3 ApiInfo my great super api v1 0 Jackson emptyList OpenApi3ApiRenderer Jackson ServerFilters Cors CorsPolicy UnsafeGlobalPermissive then handler asServer Jetty 8000 start ```

dave · Answer

` renderer = OpenApi3 ApiInfo my great api v1 0 OpenApiJackson emptyList OpenApi3ApiRenderer OpenApiJackson `

Elizabeth Thomas · Answer

Even after changing the OpenApiJackson to Jackson everywhere still no `required` in the components schemas object

dave · Answer

unfortunately the tests don t agree slightly smiling face

dave · Answer

but will take a look

Elizabeth Thomas · Answer

Can I take a look at the test which asserts for the presence of `required` attribute in the component schemas

Elizabeth Thomas · Answer

This is my gist of code <https gist github com elizabetht 93f251f8b4bc1f783dd292931f361357>

dave · Answer

ooh that s interesting just checking something

dave · Answer

there are a load of tests this is one of the expected outputs <https github com http4k http4k blob 3bc44dfeb5f16d6a2b4ab8f5cc01e9b609f3e64a http4k contract src test resources org http4k contract openapi v3 AutoJsonToJsonSchemaTest renders 20schema 20for 20holder 20with 20generic 20list approved L128|https github com http4k http4k blob 3bc44dfeb5f16d6a2b4ab8f5cc01e9b609f3e64a htt enders 20schema 20for 20holder 20with 20generic 20list approved>

dave · Answer

but the object makeup looks odd

dave · Answer

` object 1725201476 ` indicates that the renderer thinks that the backing object is JSON and not a Kotlin object

dave · Answer

otherwise you d get names like ` customPrefix org http4k contract openapi v3 ArbObject2 `

dave · Answer

from the class instead of randomly generated

Elizabeth Thomas · Answer

Sure makes sense So how do we go about fixing it Anything wrong with what I am doing in my sample code

dave · Answer

I need to dig in a bit to see what is going on

dave · Answer

yeah the code is definitely working must be something with the example A fuller version of the passing schema full OA3 is here <https github com http4k http4k blob 3bc44dfeb5f16d6a2b4ab8f5cc01e9b609f3e64a http4k contract src test resources org http4k contract openapi v3 OpenApi3AutoTest renders 20as 20expected approved L1145|https github com http4k http4k blob 3bc44dfeb5f16d6a2b4ab8f5cc01e9b609f3e64a htt ct openapi v3 OpenApi3AutoTest renders 20as 20expected approved>

Elizabeth Thomas · Answer

Or is it the difference of Argo vs JSON modules

dave · Answer

argo won t do it

Elizabeth Thomas · Answer

The example uses Argo whereas I used JSON in my sample code

dave · Answer

you need JAckson for it to be fully working

Elizabeth Thomas · Answer

So when I removed the OpenApi3Renderer from the OpenApi3 call ie ```val contract = contract renderer = OpenApi3 ApiInfo my great api v1 0 Jackson emptyList OpenApi3ApiRenderer Jackson descriptionPath = docs swagger json security = mySecurity routes += add of value1 of value2 meta summary = add description = Adds 2 numbers together returning OK sumResponseBody to SumResult 55 bindContract Method GET to add ```

Elizabeth Thomas · Answer

I get the `required` properties

dave · Answer

ah yes it s that

dave · Answer

I was jsut coming to the same conclusion

dave · Answer

the example is a bit out of date by the looks of it

Elizabeth Thomas · Answer

why would it behave differently with OpenApi3ApiRenderer

Elizabeth Thomas · Answer

Is OpenApi3ApiRenderer not needed

dave · Answer

it s used for json libraries that don t do the automarshalling of the schema

dave · Answer

basically anything that isn t Jackson

dave · Answer

you want to call this method ```fun OpenApi3 apiInfo ApiInfo json Jackson = Jackson extensions List lt OpenApiExtension gt = emptyList = OpenApi3 apiInfo json extensions ApiRenderer Auto json AutoJsonToJsonSchema json ```

dave · Answer

and hence use this ApiRenderer Auto json AutoJsonToJsonSchema json

dave · Answer

I ll update the example

dave · Answer

sorry about the comfusion

Elizabeth Thomas · Answer

No problem looking forward to see the updated example

Elizabeth Thomas · Answer

Thanks < dave> for helping to figure this out

dave · Answer

No problem Thanks for bearing with us slightly smiling face

dave · Answer

the example is actually ok it was just a mistake to import the non auto renderer I ll try to add some docs to make sure others don t fall into the same trap slightly smiling face

Elizabeth Thomas · Answer

What do you mean by `non auto renderer`

dave · Answer

`OpenApi3ApiRenderer Jackson ` is the bog standard renderer which doesn t support required fields The one that does support it comes from `ApiRenderer Auto ` that s the default that is used in the example if you click through there are 2 ways to make an `OpenApi3 ` one in jacksonExt kt and one in the class itself

dave · Answer

you tripped up when you wanted to add the extensions slightly smiling face

Elizabeth Thomas · Answer

```HTTP ERROR 500 org http4k contract openapi v3 NoFieldFound Could not find sum value in SumResult sumValue=55 URI context docs swagger json STATUS 500 MESSAGE org http4k contract openapi v3 NoFieldFound Could not find sum value in SumResult sumValue=55 SERVLET org http4k servlet HttpHandlerServlet 438bad7c CAUSED BY org http4k contract openapi v3 NoFieldFound Could not find sum value in SumResult sumValue=55 Caused by org http4k contract openapi v3 NoFieldFound Could not find sum value in SumResult sumValue=55 at org http4k contract openapi v3 FieldRetrieval$Companion$compose$1 invoke FieldRetrieval kt 17 at org http4k contract openapi v3 FieldRetrieval$Companion$compose$1 invoke FieldRetrieval kt 10 at org http4k contract openapi v3 AutoJsonToJsonSchema toObjectSchema AutoJsonToJsonSchema kt 94 at org http4k contract openapi v3 AutoJsonToJsonSchema toObjectOrMapSchema AutoJsonToJsonSchema kt 78 at org http4k contract openapi v3 AutoJsonToJsonSchema toSchema AutoJsonToJsonSchema kt 35 at org http4k contract openapi v3 AutoJsonToJsonSchema toSchema AutoJsonToJsonSchema kt 25 at org http4k contract openapi ApiRenderer$Companion$Auto$fallbackSchema$1 toSchema ApiRenderer kt 30 at org http4k contract openapi ApiRenderer$Companion$Auto$1 toSchema ApiRenderer kt at org http4k contract openapi v3 OpenApi3 toSchemaContent OpenApi3 kt 202 at org http4k contract openapi v3 OpenApi3 collectSchemas OpenApi3 kt 140 at org http4k contract openapi v3 OpenApi3 responses OpenApi3 kt 132 at org http4k contract openapi v3 OpenApi3 apiPath OpenApi3 kt 106 at org http4k contract openapi v3 OpenApi3 asPath OpenApi3 kt 92 at org http4k contract openapi v3 OpenApi3 description OpenApi3 kt 68 at org http4k contract ContractRoutingHttpHandler$$special$$inlined$let$lambda$1 invoke ContractRoutingHttpHandler kt 66 at org http4k contract ContractRoutingHttpHandler$$special$$inlined$let$lambda$1 invoke ContractRoutingHttpHandler kt 26 at org http4k routing RouterMatch$MatchingHandler invoke Router kt 47 at org http4k routing RouterMatch$MatchingHandler invoke Router kt 46 at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt 11 at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt 11 at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt 11 at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt at org http4k filter ResponseFilters$ReportHttpTransaction$invoke$2$1 invoke ResponseFilters kt 48 at org http4k filter ResponseFilters$ReportHttpTransaction$invoke$2$1 invoke ResponseFilters kt 40 at org http4k filter ServerFilters$Cors$invoke$1$1 invoke ServerFilters kt 55 at org http4k filter ServerFilters$Cors$invoke$1$1 invoke ServerFilters kt 50 at org http4k contract ContractRoutingHttpHandler$identify$1$1$1 invoke ContractRoutingHttpHandler kt 105 at org http4k contract ContractRoutingHttpHandler$identify$1$1$1 invoke ContractRoutingHttpHandler kt 26 at org http4k core Http4kKt$then$2 invoke Http4k kt 15 at org http4k core Http4kKt$then$2 invoke Http4k kt at org http4k routing RouterMatch$MatchingHandler invoke Router kt 47 at org http4k routing RouterMatch$MatchingHandler invoke Router kt 46 at org http4k routing RouterBasedHttpHandler invoke RouterBasedHttpHandler kt 23 at org http4k routing RouterBasedHttpHandler invoke RouterBasedHttpHandler kt 13 at org http4k servlet Http4kServletAdapter handle Http4kServletAdapter kt 19 at org http4k servlet HttpHandlerServlet service HttpHandlerServlet kt 14 at javax servlet http HttpServlet service HttpServlet java 750 at org eclipse jetty servlet ServletHolder handle ServletHolder java 761 at org eclipse jetty servlet ServletHandler doHandle ServletHandler java 517 at org eclipse jetty server handler ScopedHandler nextHandle ScopedHandler java 226 at org eclipse jetty server session SessionHandler doHandle SessionHandler java 1576 at org eclipse jetty server handler ScopedHandler nextHandle ScopedHandler java 226 at org eclipse jetty server handler ContextHandler doHandle ContextHandler java 1358 at org eclipse jetty server handler ScopedHandler nextScope ScopedHandler java 181 at org eclipse jetty servlet ServletHandler doScope ServletHandler java 472 at org eclipse jetty server session SessionHandler doScope SessionHandler java 1549 at org eclipse jetty server handler ScopedHandler nextScope ScopedHandler java 179 at org eclipse jetty server handler ContextHandler doScope ContextHandler java 1282 at org eclipse jetty server handler ScopedHandler handle ScopedHandler java 134 at org eclipse jetty server handler HandlerWrapper handle HandlerWrapper java 127 at org eclipse jetty server Server handle Server java 567 at org eclipse jetty server HttpChannel lambda$handle$0 HttpChannel java 404 at org eclipse jetty server HttpChannel dispatch HttpChannel java 661 at org eclipse jetty server HttpChannel handle HttpChannel java 396 at org eclipse jetty server HttpConnection onFillable HttpConnection java 289 at org eclipse jetty io AbstractConnection$ReadCallback succeeded AbstractConnection java 324 at org eclipse jetty io FillInterest fillable FillInterest java 105 at org eclipse jetty io SocketChannelEndPoint$1 run SocketChannelEndPoint java 106 at org eclipse jetty util thread QueuedThreadPool runJob QueuedThreadPool java 790 at org eclipse jetty util thread QueuedThreadPool$Runner run QueuedThreadPool java 912 at java base java lang Thread run Thread java 834 ```

Elizabeth Thomas · Answer

Qq on removing the OpenApi3ApiRenderer my openapi spec breaks left right and center in my actual code slightly smiling face To ascertain this I modified the sample gist to this `data class SumResult val sumValue Int ` from `data class SumResult val sum Int ` I get the following error when I navigate to `<http localhost 8000 context docs swagger json>`

Elizabeth Thomas · Answer

Definitely something with Jackson wiring and its property naming strategy

Elizabeth Thomas · Answer

< dave> Is there any reason you know of why the `json` in `OpenApi3` call expects the Kotlin data class member variables to be in snake case

dave · Answer

expects can you elaborate

Elizabeth Thomas · Answer

So when I have my Jackson defined like this ```object Jackson ConfigurableJackson ObjectMapper registerModule KotlinModule setDefaultPropertyInclusion JsonInclude Include NON NULL configure SerializationFeature WRITE DATES AS TIMESTAMPS false configure DeserializationFeature ADJUST DATES TO CONTEXT TIME ZONE false configure DeserializationFeature FAIL ON UNKNOWN PROPERTIES false configure DeserializationFeature READ UNKNOWN ENUM VALUES AS NULL true configure MapperFeature SORT PROPERTIES ALPHABETICALLY true configure SerializationFeature ORDER MAP ENTRIES BY KEYS true setPropertyNamingStrategy PropertyNamingStrategies SNAKE CASE ```

Elizabeth Thomas · Answer

and my data class and corresponding lens defined like this ```data class SumResult val sumValue Int val sumResponseBody = Body auto lt SumResult gt toLens ```

Elizabeth Thomas · Answer

I run into an error when I get the openapi specs ```org http4k contract openapi v3 NoFieldFound Could not find sum value in SumResult sumValue=55 ```

dave · Answer

what s the stack on that

Elizabeth Thomas · Answer

`sum value` is what is being looked for not `sumValue` from my data class definition

Elizabeth Thomas · Answer

```org http4k contract openapi v3 NoFieldFound Could not find sum value in SumResult sumValue=55 at org http4k contract openapi v3 FieldRetrieval$Companion$compose$1 invoke FieldRetrieval kt 17 at org http4k contract openapi v3 FieldRetrieval$Companion$compose$1 invoke FieldRetrieval kt 10 at org http4k contract openapi v3 AutoJsonToJsonSchema toObjectSchema AutoJsonToJsonSchema kt 94 at org http4k contract openapi v3 AutoJsonToJsonSchema toObjectOrMapSchema AutoJsonToJsonSchema kt 78 at org http4k contract openapi v3 AutoJsonToJsonSchema toSchema AutoJsonToJsonSchema kt 35 at org http4k contract openapi v3 AutoJsonToJsonSchema toSchema AutoJsonToJsonSchema kt 25 at org http4k contract openapi ApiRenderer$Companion$Auto$fallbackSchema$1 toSchema ApiRenderer kt 30 at org http4k contract openapi ApiRenderer$Companion$Auto$1 toSchema ApiRenderer kt at org http4k contract openapi v3 OpenApi3 toSchemaContent OpenApi3 kt 202 at org http4k contract openapi v3 OpenApi3 collectSchemas OpenApi3 kt 140 at org http4k contract openapi v3 OpenApi3 responses OpenApi3 kt 132 at org http4k contract openapi v3 OpenApi3 apiPath OpenApi3 kt 106 at org http4k contract openapi v3 OpenApi3 asPath OpenApi3 kt 92 at org http4k contract openapi v3 OpenApi3 description OpenApi3 kt 68 at org http4k contract ContractRoutingHttpHandler$$special$$inlined$let$lambda$1 invoke ContractRoutingHttpHandler kt 66 at org http4k contract ContractRoutingHttpHandler$$special$$inlined$let$lambda$1 invoke ContractRoutingHttpHandler kt 26 at org http4k routing RouterMatch$MatchingHandler invoke Router kt 47 at org http4k routing RouterMatch$MatchingHandler invoke Router kt 46 at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt 11 at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt 11 at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt 11 at org http4k core Http4kKt$NoOp$1$1 invoke Http4k kt at org http4k filter ResponseFilters$ReportHttpTransaction$invoke$2$1 invoke ResponseFilters kt 48 at org http4k filter ResponseFilters$ReportHttpTransaction$invoke$2$1 invoke ResponseFilters kt 40 at org http4k filter ServerFilters$Cors$invoke$1$1 invoke ServerFilters kt 55 at org http4k filter ServerFilters$Cors$invoke$1$1 invoke ServerFilters kt 50 at org http4k contract ContractRoutingHttpHandler$identify$1$1$1 invoke ContractRoutingHttpHandler kt 105 at org http4k contract ContractRoutingHttpHandler$identify$1$1$1 invoke ContractRoutingHttpHandler kt 26 at org http4k core Http4kKt$then$2 invoke Http4k kt 15 at org http4k core Http4kKt$then$2 invoke Http4k kt at org http4k routing RouterMatch$MatchingHandler invoke Router kt 47 at org http4k routing RouterMatch$MatchingHandler invoke Router kt 46 at org http4k routing RouterBasedHttpHandler invoke RouterBasedHttpHandler kt 23 at org http4k routing RouterBasedHttpHandler invoke RouterBasedHttpHandler kt 13 at org http4k servlet Http4kServletAdapter handle Http4kServletAdapter kt 19 at org http4k servlet HttpHandlerServlet service HttpHandlerServlet kt 14 at javax servlet http HttpServlet service HttpServlet java 750 at org eclipse jetty servlet ServletHolder handle ServletHolder java 761 at org eclipse jetty servlet ServletHandler doHandle ServletHandler java 517 at org eclipse jetty server handler ScopedHandler nextHandle ScopedHandler java 226 at org eclipse jetty server session SessionHandler doHandle SessionHandler java 1576 at org eclipse jetty server handler ScopedHandler nextHandle ScopedHandler java 226 at org eclipse jetty server handler ContextHandler doHandle ContextHandler java 1358 at org eclipse jetty server handler ScopedHandler nextScope ScopedHandler java 181 at org eclipse jetty servlet ServletHandler doScope ServletHandler java 472 at org eclipse jetty server session SessionHandler doScope SessionHandler java 1549 at org eclipse jetty server handler ScopedHandler nextScope ScopedHandler java 179 at org eclipse jetty server handler ContextHandler doScope ContextHandler java 1282 at org eclipse jetty server handler ScopedHandler handle ScopedHandler java 134 at org eclipse jetty server handler HandlerWrapper handle HandlerWrapper java 127 at org eclipse jetty server Server handle Server java 567 at org eclipse jetty server HttpChannel lambda$handle$0 HttpChannel java 404 at org eclipse jetty server HttpChannel dispatch HttpChannel java 661 at org eclipse jetty server HttpChannel handle HttpChannel java 396 at org eclipse jetty server HttpConnection onFillable HttpConnection java 289 at org eclipse jetty io AbstractConnection$ReadCallback succeeded AbstractConnection java 324 at org eclipse jetty io FillInterest fillable FillInterest java 105 at org eclipse jetty io SocketChannelEndPoint$1 run SocketChannelEndPoint java 106 at org eclipse jetty util thread QueuedThreadPool runJob QueuedThreadPool java 790 at org eclipse jetty util thread QueuedThreadPool$Runner run QueuedThreadPool java 912 at java base java lang Thread run Thread java 834 ```

dave · Answer

There is a renamingStrategy configued in SimpleLookup you might have luck in using that instead

dave · Answer

but to make your life easier I really would suggest trying to stick to camelCase naming

Elizabeth Thomas · Answer

When I make my Jackson to have `PropertyNamingStrategy` as `LOWER CAMEL CASE` instead of `SNAKE CASE` the openApi spec generates correctly

dave · Answer

yeah there is a concept called FieldRetrieval which attempts to lookup the field on the object when creating the metadata which is needed for all the required etc The SimpleLookup is one of these objects

Elizabeth Thomas · Answer

My understanding of Jackson is very limited so please bare with me If I set the naming strategy to be camelCase would it alter the way my JSON files are being read Because in my actual project the actual JSON files come with attributes in snake case and data classes are defined with camelCase

dave · Answer

yeah then you probably want to setup a custom SimpleLookup when creating your renderer or use the Jackson property annotations to convert them

Elizabeth Thomas · Answer

Is there an example of how to use the OpenApi3ApiRenderer if I am understanding you correctly with custom SimpleLookup

dave · Answer

no

dave · Answer

yo ll have to play with it

Elizabeth Thomas · Answer

But from our earlier conversation you suggested to not use the OpenApi3Renderer correct which doesn t generate the `required` meta data on the component schemas

dave · Answer

you don t need to use the OpenApi3Renderer

dave · Answer

```fun OpenApi3 apiInfo ApiInfo json Jackson = Jackson extensions List lt OpenApiExtension gt = emptyList = OpenApi3 apiInfo json extensions ApiRenderer Auto json AutoJsonToJsonSchema json fun AutoJsonToJsonSchema json Jackson = AutoJsonToJsonSchema json FieldRetrieval compose SimpleLookup metadataRetrievalStrategy = JacksonFieldMetadataRetrievalStrategy FieldRetrieval compose JacksonJsonPropertyAnnotated JacksonJsonNamingAnnotated json ```

dave · Answer

The bit you need is to either 1 replace JacksonFieldMetadataRetrievalStrategy in the above

dave · Answer

2 use Jackson annoatations on the fields of your model

Elizabeth Thomas · Answer

ah okay I will play with it and see

Elizabeth Thomas · Answer

Thanks

Elizabeth Thomas · Answer

I got confused with `renderer` and `OpenApi3Renderer` Is there a way to use `OpenApi3` from jacksonExt kt instead of a similar function from OpenApi3 kt

dave · Answer

just use this method and it will automatically pick it up ```OpenApi3 apiInfo json extensions ApiRenderer Auto json AutoJsonToJsonSchema json ```