Have you solved this? On Monday, December 17, 2012 at 9:03:50 AM UTC+7, Boris wrote: > > On Sun, Dec 16, 2012 at 5:45 PM, Dustin Sallings <dsal...@gmail.com > <javascript:>> wrote: > >> Boris <boris....@gmail.com <javascript:>> writes: >> >> > I have JSON web API that accepts fields URL parameter, like this: >> > >> > GET /something/?fields=a,b,c >> > >> > This is common pattern in web APIs to send partial objects instead of >> > full objects. Suppose struct has fields a,b,c,...z, I don't want to >> > fetch all fields from database, marshall, send, unmarshall, etc. I >> > know I can add tag to struct fields to suppress them in JSON, but that >> > is done at compile-time. Is there a way to do this at run-time, or >> > should I write custom marshaller for this? >> >> You need to implement a custom MarshalJSON for your object that >> considers some internal fields you configure to specify which parameters >> are emitted. >> >> > Interesting, so http://golang.org/pkg/encoding/json/#Marshaler is the way > to override default marshaling. I guess I will implement some helper > function so I don't re-implement this for every single struct type I use, > and have an internal field in the item, which I set to indicate which > fields to include. If anyone has anything else to add, like an example > implementation or tips for efficiency, I will appreciate. > > Thanks > Boris >
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