assign form values to struct in Golang

Question

I am working on a API-Rest in Golang. I'm using Gorm so I have the structs that represent the database tables. In Create I receive a Form with the values, but right now am having a doubt of how can I assign inmediatly all the values to the structure, because I have a table with 5 hundred fields and I cannot make assignments one by one, I was doint in this way:

json.NewDecoder(req.Body).Decode(&myobject)

But there I had to receive a Json, and the client side is sending me a Form. So, how can I assign that values in a clean and readable way?

The cleanest way is to probably forgo decoding the request body, and just put the values directly into a struct. — william.taylor.09
– william.taylor.09, Commented May 18, 2017 at 15:47
Answered, but, I have to ask... how in the world did you end up with a table with 500 columns? — Adrian
– Adrian, Commented May 18, 2017 at 16:12
Check out the binding library, which is designed to solve this problem — nothingmuch
– nothingmuch, Commented May 18, 2017 at 16:44
@Adrian Hi Adrian, I didn't made that design. Indeed I was surprised when I saw it, but it responds to a standar stablished in the company on which I am working, is strange but it's ok — Sredny M Casanova
– Sredny M Casanova, Commented May 18, 2017 at 19:35

Adrian · Accepted Answer · 2017-05-18 16:12:05Z

11

There is no built-in way of unmarshalling a multipart/form-data body into a struct. However, Go does automatically parse form data into a map[string][]string in Request.Form, which you could convert to a map[string]string with a simple loop. Then you could transfer that to a struct yourself using reflection, or you could use a library like mapstructure or gorilla/schema.

answered May 18, 2017 at 16:12

Adrian

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