How to add multiple of the same/array parameter using Retrofit?

Question

I have an instance where I need to pass multiple of the same named parameters to a server (array of data).

Changing it is not a possibility.

http://test.com?test[]=1&test[]=2&test[]=3

How do I accomplish this with RetroFit? I see that you can pass a map of values, but that doesn't help as the keys are all identical.

Any help would be great... really hoping there's a clean way/workaround or else I'm going to need to use another api lib and do a project refactor.

Are you using retrofit 1.4.+? It looks like arrays were added to a field, but I haven't tried this yet. * New: @Field now accepts List or arrays for multiple values. * New: @Query and @EncodedQuery now accept List or arrays for multiple values. — daentech
– daentech, Commented Feb 19, 2014 at 21:33
You are correct. Found that a few hours ago. If you make that an answer I'll mark it as the solution. — loeschg
– loeschg, Commented Feb 19, 2014 at 23:59
I wouldn't call it bizarre. Both html checkbox and select multiple controls will encode the form like this. — CaptRespect
– CaptRespect, Commented May 22, 2014 at 15:02

daentech · Accepted Answer · 2014-02-20 00:01:56Z

19

Retrofit as of 1.4.0 added the ability to send an array or List as a @Field or @Query parameter.

New: @Query and @EncodedQuery now accept List or arrays for multiple values.
New: @Field now accepts List or arrays for multiple values.

answered Feb 20, 2014 at 0:01

daentech

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3 Comments

The relevant lines in source can be found here: github.com/square/retrofit/pull/377/…

Any idea how a similar problem with Part parameter in Multipart can be tackled?

How do they get encoded I wonder? I will look at the pull request mentioned above.

Mostafa Abdellateef · Accepted Answer · 2015-11-11 11:49:45Z

6

I am using retrofit:1.9.0, one way of doing http://test.com?test[]=1&test[]=2&test[]=3 is like this

void test(@Query("test[]") ArrayList<String> values);

answered Nov 11, 2015 at 11:49

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