Updating createMovieHandler accepting data.Runtime for the Runtime field. Updating internal/data/runtime.go with the json.Unmarshaler interface to transform our client's runtime string field '%d mins' into a Runtime type format.

cmd/api/movies.go

@@ -11,10 +11,10 @@ import (
 func (app *application) createMovieHandler(w http.ResponseWriter, r *http.Request) {
 	// Declare an anonymous struct to hold the information that we expect to be in the HTTP request body (note that the field names and types in the struct are a subset of the Movie struct that we created earlier). This struct will be our *target decode destination*.
 	var input struct {
-		Title   string   `json:"title"`
-		Year    int32    `json:"year"`
-		Runtime int32    `json:"runtime"`
-		Genres  []string `json:"genres"`
+		Title   string       `json:"title"`
+		Year    int32        `json:"year"`
+		Runtime data.Runtime `json:"runtime"`
+		Genres  []string     `json:"genres"`
 	}
 
 	// Use the new readJSON() helper to decode the request body into the input struct. If this returns an error, we send the client the error message along with a 400 Bad Request status code, just like before.