Creating GetAll MovieModel method to retrieve all movies. Updating the listMovieHandler to use the new GetAll MovieModel's method.

internal/data/movies.go

@@ -191,3 +191,60 @@ func (m MovieModel) Delete(id int64) error {
 
 	return nil
 }
+
+// GetAll : Returns a slice of movies. Although we're not using them right now, we've set this up to accept the various filter parameters as arguments
+func (m MovieModel) GetAll(title string, genres []string, filters Filters) ([]*Movie, error) {
+	// Construct the SQL query to retrieve all movie records.
+	query := `
+		SELECT id, created_at, title, year, runtime, genres, version
+		FROM movies
+		ORDER BY id`
+
+	// Create a context with a 3-second timeout
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
+	defer cancel()
+
+	// Use QueryContext() to execute the query. This returns a sql.Rows resultset containing the result
+	rows, err := m.DB.QueryContext(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+
+	// Importantly, defer a call to rows.Close() to ensure the resultset is closed before GetAll() returns
+	defer rows.Close()
+
+	// Initialize an empty slice to hold the movie data.
+	movies := []*Movie{}
+
+	// Use rows.Next to iterate through the rows in the resultset.
+	for rows.Next() {
+		// Initialize an empty Movie struct to hold the data for an individual movie.
+		var movie Movie
+
+		// Scan the values from the row into the Movie struct. Again, note that we're using the pq.Array() adapter on the genres field here.
+		err := rows.Scan(
+			&movie.ID,
+			&movie.CreatedAt,
+			&movie.Title,
+			&movie.Year,
+			&movie.Runtime,
+			pq.Array(&movie.Genres),
+			&movie.Version,
+		)
+		if err != nil {
+			return nil, err
+		}
+
+		// Add the Movie struct to the slice.
+		movies = append(movies, &movie)
+	}
+
+	// When the rows.Next() loop has finished, call rows.Err() to retrieve any error that was encountered during the iteration.
+	if err = rows.Err(); err != nil {
+		return nil, err
+	}
+
+	// If everything went OK, then return the slice of movies
+	return movies, nil
+
+}