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Solved my problem by adding secondary converter.
I used this library https://github.com/jamesdeperio/...
Full documentation here:https://jamesdeperio.github.io/retr...
So my retrofit builder now looks like this:
@Provides
@Singleton
fun provideRetrofit(application: Application, client: OkHttpClient, moshi: Moshi) = Retrofit.Builder()
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.addConverterFactory(MoshiConverterFactory.create(moshi))
.addConverterFactory(SerializationFormatFactory.Builder().setJSONConverterFactory(MoshiConverterFactory.create(moshi).withNullSerialization()).build())
.client(client)
.baseUrl(application.getString(R.string.api_base))
.build()
And then in the services api interface all I have to do is add annotation @JSONFormat and then this post request will include nulled parameter values into my post request
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It all makes sense now...
Question regarding android. I am having a problem with retrofit (I am using moshi converter factory) and hope that you can help.
Basically I have a screen with 3 checkboxes. User is able to select any of these checkboxes, and also user is allowed to select none of them.
When user doesn't select any checkboxes and click complete button, I send a PATCH request to backend with a model which contains 3 null values.
Problem here is that PATCH request which is being sent doesn't include any properties which have been nulled.
I spent some time researching why retrofit/moshi doesn't serialize nulled properties and I found a fix.
So I have this line
.addConverterFactory(MoshiConverterFactory.create(moshi))
Which I replaced with
.addConverterFactory(MoshiConverterFactory.create(moshi).withNullSerialization())
Now nulls are serialized and I am able to send a PATCH request model with nulled values. However now I'm facing another problem. Across my app I'm using only one retrofit client and I don't want to serialize nulls for all requests. Also I don't want to create another retrofit client.
How can I fix this problem? As far as I've researched it seems that I need to add an adapter with toJson() and fromJson() methods and then somehow enable nullSerialization only for that adapter. However I don't completely understand that solution and not even sure how to handle it.
question
android