I am building a stock quote web app by using Go and Yahoo API.
The question is how to switch between array and single struct without writing another struct. I am not sure how to explain it in words. Here is the example:
Get one symbol quote from Yahoo API looks like this:
{"query":{"count":1,"created":"2016-05-11T02:12:33Z","lang":"en-US","results":{"quote":{"Change":"+0.21","DaysLow":"9.32","DaysHigh":"9.68","Name":"Alcoa Inc. Common Stock","Open":"9.56","PreviousClose":"9.46","Symbol":"aa","Volume":"22266533","PercentChange":"+2.22%"}}}}
Get multiple quotes from Yahoo API:
{"query":{"count":2,"created":"2016-05-11T02:17:48Z","lang":"en-us","results":{"quote":[{"Change":"+0.21","DaysLow":"9.32","DaysHigh":"9.68","Name":"Alcoa Inc. Common Stock","Open":"9.56","PreviousClose":"9.46","Symbol":"aa","Volume":"22266533","PercentChange":"+2.22%"},{"Change":"+0.63","DaysLow":"92.11","DaysHigh":"93.57","Name":"Apple Inc.","Open":"93.35","PreviousClose":"92.79","Symbol":"aapl","Volume":"33686836","PercentChange":"+0.68%"}]}}}
The difference is the quote becomes an array []
.
How to handle it when using json.Unmarshal(quoteResultRawJSON, &queryResult)
?
I have struct look like:
type QueryResult struct {
Id bson.ObjectId `bson:"_id,omitempty"`
Query Query `json:"query"`
}
type Query struct {
Count int `json:"count"`
Created string `json:"created"`
Lang string `json:"lang"`
Results Quote `json:"results"`
}
type Quote struct {
Quote StockQuote `json:"quote"` //Here is the difference. Do I need to re-write the whole struct in order to handle []
}
type StockQuote struct {
Change string `json:"change"`
PercentChange string `json:"percentChange"`
DaysLow string `json:"daysLow"`
DaysHigh string `json:"daysHigh"`
Open string `json:"open"`
PreviousClose string `json:"previousClose"`
Symbol string `json:"symbol"`
Name string `json:"name"`
Volume string `json:"volume"`
}
Do I have to write another struct to handle array?