shortid | Short id generator Url-friendly Non-predictable Cluster-compatible

I am trying to create a User with a profile picture. I am using multer, I have no idea how to use multer I just followed the documentation, But when I try to create a user with a profile picture it shows me an error TypeError: Cannot read property 'filename' of undefined. I am using MongoDB, express.js as a backend.

Here is my code

models (user.js)

I am receiving a payload via API Gateway to my Lambda function.

I understand that Mongoose provides a straight-forward, schema-based solution to model your application data. It includes built-in type casting, validation, query building, business so here is my code.

I have the following schema on my model:

I try to create category to eCommerce project then it throws an error Postman - throws an error

These are source codes

location: ecommerce-backend\index.js

what i'm trying to do is to signup my user using simple form ,but suddenly i get this error also it seems that data (promise argument ) is undefined , Unhandled Runtime Error TypeError: Cannot read property 'message' of undefined

(forgive my terminology)

frontend

I'm trying to run this function but it's returning undefined.

I'm new to Javascript and I'm trying to learn express and create an application that will allow users to create new recipes, browse existing recipes, and view recipes.

I've got my server running by typing recipeserver.js in the cmd bar and then typing localhost:3000 in my address bar on google chrome. So far it loads the index.html homepage and from there, I am able to click on a link titled "Create a Recipe" which leads me to the create.html page that looks like this:

create.html page

Initially, there will be only three recipes on the server, which are included in the database object within the recipeserver.js code I've included below. The create.html page allows a user to enter recipe information. When the Save Recipe button is clicked, the addrecipe.js file is supposed to send the recipe data to the server using a POST request to the resource /recipes

Within the server code, all recipes will be stored in a single object called database. The keys of this object will be unique IDs and the values will be the recipes associated with those IDs. I'm stuck on a task where I'm supposed to add a route within the server code to handle POST requests to the /recipes resource. The handler for this route should:

1. Extract the recipe object included in the POST request body
2. Generate a unique ID for the new recipe (Etc. a basic integer that increases every time a recipe is added.)
3. Add a new entry into the recipes object with the key being the unique ID and the value being the recipe object.

When testing my code by adding a few recipes to my server, I should be able to just log the contents of the recipes object to see that it is storing the correct data, like in the picture below (this picture isn't mine):

load recipe in cmd

So as shown in the first picture of my screen, I filled in the contents of the recipe I want to add in create.html. When I click on the "Save Recipe" button however, instead of loading the contents of the recipe into my cmd window, I get the error:

I'm working on a MERN app, pretty much done, all I have left to do is deploy it. The app works perfectly when I run it locally, but I deploy to Heroku, I get the following error in the browser console:

I have an array with two products in it. (later, the list will be more complete, for the moment it's to test the autocomplete that I did like this) I would like to display the list of the names of these two products in an autocomplete input made with the 'react-native-dropdown-autocomplete' package. I wanted to initialize name in the state, my concern is that when I ask to display this.state.name it returns me undefined since the two names of the two products are different in the array.