On Tuesday, April 28, 2020 at 10:52:56 AM UTC+2, Chris Burkert wrote: > > Dear all, > > my application users shall be able to provide multiple json documents > (files and urls) which I'd like to marshall into one structure. > Additionally these json documents may have different versions. I know how > to marshal a document into a version specific struct if I know the format > version before (for simplicity of this example I don't handle errors): > https://play.golang.org/p/ixVI5CzPqFP > > What I would like (in the example the village field was renamed to cities > ) is a struct of type ModelV2 with all four values merged in Cities. > > Is there a best practice for a backwards compatible behavior which: > > - identifies the json format version of each document > - skips that document if it is higher than the supported format > version in my application > - merges supported format versions into ONE struct > > Of course I have to implement the semantics on my own but how can I > approach the topic? > > You can first unmarshal a struct containing only the Version field. As an example: https://play.golang.org/p/1oDzdWlTCfC <https://play.golang.org/p/6G9ooLneADX>
Manlio > thanks > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/274e489d-afdb-4ec9-a5b3-26440364c489%40googlegroups.com.
