Updating internal/data/movies.go to Get a movie from the database. Updating cmd/api/movies.go showMovieHandler method to fetch a movie from a request (using the MovieModel's Get method).

cmd/api/movies.go

@@ -1,11 +1,11 @@
 package main
 
 import (
+	"errors"
 	"fmt"
 	"greenlight.craftr.fr/internal/data"
 	"greenlight.craftr.fr/internal/validator"
 	"net/http"
-	"time"
 )
 
 // "POST /v1/movies" endpoint.
@@ -70,24 +70,20 @@ func (app *application) showMovieHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	/*
-		Create a new instance of the Movie struct containing the ID we
-		extracted from the URL and some dummy data. Also notice that we
-		deliberately haven't set a value for the Year field.
-	*/
-	movie := data.Movie{
-		ID:        id,
-		CreatedAt: time.Now(),
-		Title:     "Casablanca",
-		Runtime:   102,
-		Genres:    []string{"drama", "romance", "war"},
-		Version:   1,
+	// Call the Get() method to fetch the data for a specific movie. We also need to use the errors.Is() function to check if it returns a data.ErrRecordNotFound error in which case we send a 404 Not Found response to the client.
+	movie, err := app.models.Movies.Get(id)
+	if err != nil {
+		switch {
+		case errors.Is(err, data.ErrRecordNotFound):
+			app.notFoundResponse(w, r)
+		default:
+			app.serverErrorResponse(w, r, err)
+		}
+		return
 	}
 
-	// Encode the struct to JSON and send it as the HTTP response.
 	err = app.writeJSON(w, http.StatusOK, envelope{"movie": movie}, nil)
 	if err != nil {
-		// Use the new serverErrorResponse() helper
 		app.serverErrorResponse(w, r, err)
 	}
 }