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API Development in Go Using MongoDB

Update a Movie

Explore how to build a secured update endpoint in your Go API to modify movie records stored in MongoDB. Learn to implement PUT requests with admin-level authentication, pass movie identifiers and update parameters, and verify the changes in the database for robust API development.

We'll cover the following...

Setting up the controller

If we want to change a specific detail in a movie, we need to create an update endpoint. This endpoint will accept the movie_id of the movie that we want to update as well as the parameters to be changed. It will be a secured route, and only administrators can change the context of movies.

// Update a movie

func UpdateMovie() gin.HandlerFunc {

	return func(c *gin.Context) {

		ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)

		movieId := c.Param("movie_id")

		var movie models.Movie

		defer cancel()

		objId, _ := primitive.ObjectIDFromHex(movieId)



		if err := c.BindJSON(&movie); err != nil {

			c.JSON(http.StatusBadRequest, gin.H{

				"Status":  http.StatusBadRequest,

				"Message": "error",

				"Data":    map[string]interface{}{"data": err.Error()}})

			return

		}



		if validationError := validate.Struct(&movie); validationError != nil {

			c.JSON(http.StatusBadRequest, gin.H{

				"Status":  http.StatusBadRequest,

				"Message": "error",

				"Data":    map[string]interface{}{"data": validationError.Error()}})

			return

		}



		update := bson.M{

			"name":      movie.Name,

			"topic":     movie.Topic,

			"genre_id":  movie.Genre_id,

			"movie_url": movie.Movie_URL}

		filterByID := bson.M{"_id": bson.M{"$eq": objId}}

		result, err := movieCollection.UpdateOne(ctx, filterByID, bson.M{"$set": update})

		if err != nil {

			c.JSON(http.StatusInternalServerError, gin.H{

				"Status":  http.StatusInternalServerError,

				"Message": "error",

				"Data":    map[string]interface{}{"data": err.Error()}})

			return

		}



		var updatedMovie models.Movie

		if result.MatchedCount == 1 {

			err := movieCollection.FindOne(ctx, filterByID).Decode(&updatedMovie)

			if err != nil {

				c.JSON(http.StatusInternalServerError, gin.H{

					"Status":  http.StatusInternalServerError,

					"Message": "error",

					"Data":    map[string]interface{}{"data": err.Error()}})

				return

			}

		}



		c.JSON(http.StatusOK, gin.H{

			"Status":  http.StatusOK,

			"Message": "movie updated successfully!",

			"Data":    updatedMovie})

	}

}
The movieController.go file

Setting up the route

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