populate struct fields in Go by looping over data from another function-CodePudding

I have a couple handlers in a web app (Fiber framework) where one handler retrieves data from an external API and the other handler takes a subset of this data and performs some business logic (ie sends a report, etc).

Both handlers are in the same package. In handler2.go I am able to dereference the data from handler1.go and I want to use specific values from that data to populate the struct fields in handler2.go. The dereferenced data from handler1.go is itself an array of structs that I can loop over.

In handler2.go , I have a struct:

type Report struct {
  contact  string
  date     string
  resource string
}

// get data from handler1.go function and use it to populate the Report struct
// each "report" is a struct, so need to create a list of structs
func getReportData() {
   reportData := GetReport() // call function in handler1.go
   for _, report := range *reportData {
   fmt.Println(report.Date)
}

So instead of simply printing the data (the print statement is just to show that I have access to the data I need) I want to populate the Report struct with specifc items from the data that I can can access using the loop and the report.<KEY> syntax.

How can I create a list of structs (using the Report struct) populated with the data I can get via this for loop?

For an MVP , I can simply format this list of structs (in json) and display an endpoint in the web app. I am just struggling with how to construct this data properly.

CodePudding user response：

To answer the direct question, if we assume that the values returned by GetReport() have Date, Contact, and Resource fields, then you could write:

type Report struct {
  contact  string
  date     string
  resource string
}

// Return a list (well, slice) of Reports
func getReportData() (reports []Report) {
  reportData := GetReport()
  for _, report := range reportData {
    myReport := Report{
      contact:  report.Contact,
      date:     report.Date,
      resource: report.Resource,
    }

    reports = append(reports, myReport)
  }

  return
}