How to have development struct and production struct in Golang with same members but different JSON tags?

php Editor Apple In Golang development, we often encounter situations where we need to use the same members in the development structure and production structure, but need different JSON tags. In this case, we need to find a flexible solution so that we can easily switch between different tabs while writing code. This article will introduce how to implement this requirement in Golang to make the development process more efficient and flexible.

Question content

First time asking! I'm trying to separate development and production using the same structure.

I'm using airtable which sends the records as json with the fld tags we use when unmarshalling.

type airtablerecord struct {
    name   *string  `json:"fldaaaa,omitempty"`
}

I have 2 separate airtables:

1. For development
2. for production

They are the same, it's just that due to the way airtable works, the fields are given different fld tags

Pictures of my airtable venue

Now to separate the development environment from the production environment, I have to uncomment the correct members based on the airtable I'm pointing to.

type airtablerecord struct {
    // development
    name   *string  `json:"fldaaaa,omitempty"`

    // production
    //name   *string  `json:"fldbbbb,omitempty"`
}

I keep this type in it's own model.go file for use by other packages.

I have investigated:

• There are multiple json tags in one line, golang will not do this

type airtablerecord struct {
    // development or production
    name   *string  `json:"fldaaaa,fldbbbb,omitempty"`
}

• Separating my files using build tags, maybe this works but I'm doing it wrong

File 1:

// +build dev
type airtablerecord struct {
    // development
    name   *string  `json:"fldaaaa,omitempty"`
}

File 2:

type AirtableRecord struct {
    // Production
    Name   *string  `json:"fldBBBB,omitempty"`
}

• Have looked into using re-tagging but the examples they gave don't look like what I'm looking for
  • Retag link: https://pkg.go.dev/github.com/sevlyar/[email protected]

I want to dynamically change the label of this member based on whether I'm running in development mode or production mode.

Any and all help would be greatly appreciated!

Workaround

If you receive a redeclared compilation error using build flags in this block, specify an unmarked flag on the prod file , to avoid this situation.

Development files

// +build dev
type airtablerecord struct {
    // development
    name   *string  `json:"fldaaaa,omitempty"`
}

Product Documents

// +build !dev
type airtablerecord struct {
    // development
    name   *string  `json:"fldaaaa,omitempty"`
}

Construct

# for dev
go build -tags=dev -o devrel
# for prod
go build -tags=prod -o prodrel  
or no tags for prod

The build tag format has also changed since 1.17, so in your case it would be,

//go:build dev

But should also be used with the old one.

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