Hi guys, I was wondering if there exist something ...
# androidm
Mohammed Alaa
11/20/2019, 7:01 PMHi guys, I was wondering if there exist something for JSON parsing that work with Retrofit in android like Codable Protocol in ios Swift that allow dynamic json parsing ,or I should create my own JSON converter for every type?
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Casey Brooks
11/20/2019, 7:06 PMThere’s a Retrofit converter adapter for kotlinx.serialization https://github.com/JakeWharton/retrofit2-kotlinx-serialization-converter
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Mohammed Alaa
11/20/2019, 7:11 PMThanks, will try it
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Anastasia Finogenova
11/20/2019, 10:16 PMGson and it has a converter factory for retrofit
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Cody Engel
11/21/2019, 1:31 AMMoshi has been nice, you forget there’s even JSON serialization happening
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varun
11/21/2019, 4:50 AMI also prefer Moshi over Gson because Moshi gives an exception when you try to parse null/absent values into fields that are non-nullable.
Gson silently sets those non-nullable fields to null via reflection and then you get an exception where you won't expect it.
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Mohammed Alaa
11/21/2019, 7:38 AMYes I had tried Converter factory but this will reqire me to know all the keys which valus are changing , lets say for example I have a key which return sometimes JsonArray and other times return JsonObject in the same API Call ,so I need to know this key
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varun
11/21/2019, 9:25 AM@Mohammed Alaa Can you post samples of the type of responses you are expecting?
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Mohammed Alaa
11/21/2019, 9:42 AM@varun of course
https://pastebin.com/ee6UiA9E
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Cody Engel
11/21/2019, 1:23 PMOh gotcha. So as other countries are added you’ll get a new key and value but the root object would stay the same?
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Mohammed Alaa
11/21/2019, 2:33 PM@Cody Engel yes
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Anastasia Finogenova
11/21/2019, 2:35 PMI had the same issue that the same key could be either an array or an object and successfully fixed it with Gson
Anastasia Finogenova
11/21/2019, 2:35 PMAlso if you are using kotlin and null is set to non-nullable value the app will crash
Anastasia Finogenova
11/21/2019, 2:36 PMAnastasia Finogenova
11/21/2019, 2:36 PMPretty common case it seems 🤷
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Mohammed Alaa
11/21/2019, 2:37 PM@Anastasia Finogenova Thanks, this is very interesting
Mohammed Alaa
11/21/2019, 2:40 PM@Anastasia Finogenova👍 Solution with Generic are good for me so I can't know how many keys will need this
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Cody Engel
11/21/2019, 2:50 PMThis shouldn’t be a common use case but yeah it happens. Moshi lets you write custom converters as well.
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Anastasia Finogenova
11/21/2019, 2:52 PMCommon in a way it doesn't surprise me at all😅
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Mohammed Alaa
11/21/2019, 2:52 PM@Cody Engel yes it isn't a common use case but it happened with me 😃
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Anastasia Finogenova
11/21/2019, 2:54 PMHappened to me too and appearantly if the answer on stackoverflow has 74 upvotes at least to other 74 people 😆
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Mohammed Alaa
11/21/2019, 2:56 PMYes, You count only who up-vote so whats about others who doesn't vote and happened with them 😉
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Anastasia Finogenova
11/21/2019, 3:01 PMExactly, some bad backend designers out there 🤷
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Cody Engel
11/21/2019, 3:07 PMFor sure, don’t want to say it doesn’t happen regularly with various APIs, just saying that it shouldn’t because an array and map aren’t the same type 😂
Cody Engel
11/21/2019, 3:08 PMBut with Moshi you can create custom adapters with the
@FromJson3 Views