Parsing JSON response from Google Maps - json

Question

I needed to create a proxy-server to connect to the google maps webservicees, and I found a tutorial that does about 95% of what I need. The tutorial uses golang, I'm almost completely new to golang, and if I follow it exactly, it works fine. But the moment I try to change something from the tutorial, I'm obviously messing something up, lol.
The issue that I need right now is that the tutorial only parses 2 variables from the google-maps response, the latitude and longitude. For the rest of my app I ALSO need the place Id.
I'm receiving the response from google-maps, not a problem. If I parse it as
type placeResults struct {
Results []struct {
Geometry struct {
Location struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
} `json:"location"`
} `json:"geometry"`
} `json:"results"`
}
It works fine and gives me the latitude and longitude, no worries.
But if I instead try,
type placeResults struct {
Results []struct {
Geometry struct {
Location struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
} `json:"location"`
} `json:"geometry"`
id struct {
Id string `json:"id"`
}
} `json:"results"`
}
It tells me:
json: cannot unmarshal string into Go struct field .Id of type struct { Id string "json:\"id\"" }
Now the id variable isn't part of the geometry, but is a generic part of the response, so I figured this would be the correct syntax. Obviously I am wrong. But what IS the correct syntax to include this?

Answer 1

Google place API response looks like,
"geometry" : {
"location" : {
"lat" : -33.866651,
"lng" : 151.195827
},
"viewport" : {
"northeast" : {
"lat" : -33.8653881697085,
"lng" : 151.1969739802915
},
"southwest" : {
"lat" : -33.86808613029149,
"lng" : 151.1942760197085
}
}
},
"icon" : "https://maps.gstatic.com/mapfiles/place_api/icons/generic_business-71.png",
"id" : "4f89212bf76dde31f092cfc14d7506555d85b5c7",
So you need to declare id field as string, not struct. You need to change placeResult structure.
type modifiedPlaceResult struct {
Geometry struct {
Location struct {
Lat float64 `json:"lat"`
Lng float64 `json:"lng"`
} `json:"location"`
} `json:"geometry"`
Id string `json:"id"`
}
try use modifiedPlaceResult struct for Unmarshaling data, everything would be ok.
I attached the example from Go playground: https://play.golang.org/p/Q4rM-jluoFe