Serialize Query-Parameter in Retrofit

Question

Imagine the following request:

@POST(\"/recipes/create\")
void createRecipe(@Query(\"recipe\") Recipe recipe, Callback callback);

Answer 1

I don't think it supports this right now in some nice way. Check this answer by one of the authors: https://github.com/square/retrofit/issues/291

The suggested method from that answer is to create a custom type that overrides the toString() method, because Retrofit internally uses String.valueOf(value) to convert query or path parameters to strings.

So, you could have something like this:

class Recipe {
  public int id;
  public String title;

  @Override
  public String toString() {
    // You can use a GSON serialization here if you want
    // This is not a robust implementation
    return Integer.toString(id) + "-" + title;
  }
}