Moralis Course Help Thread

[ramsir011]

How to connect moralis with Ganache. i am trying hard but it does not work

[Chris_Bailey]

You need to spin up a local dev chain server, then you can follow the instructions under the “View Details” section.

Here’s a video that may also help:
https://www.youtube.com/watch?v=aRRS394is1U

[ramsir011]

we can not find those option in updated moralis. There is no more option to connect to ganache

[ramsir011]

thi
i am trying to connect with ganache but i could not see any option as shown in video.
what can i do?

[thecil]

Hey @ramsir011, hope you are well.

Here you have tutorials for it: https://docs.moralis.io/moralis-server/web3/setting-up-ganache

Hope it helps

Carlos Z

[Chris_Bailey]

Can you confirm that this server you are sharing is a ‘Local Dev Chain’ server? It would normally say Ganache. Because the options you are showing suggests it’s either Testnet or Mainnet server.

[ramsir011]

Thank you so much. now i got it

[m33lucky]

in the lesson for 201 , an emulator is used, which one was it ? where do I download it from and how to install emulator?
thanks

[ramsir011]

const serverUrl = “https://mg7bo35bvnr0.usemoralis.com:2053/server”;

const appId = “xltfxOMya7zPYfh6d4jzeYBeM1qAhLq2SuW0ObpA”;

Moralis.start({ serverUrl, appId });

const TOKEN_CONTRACT_ADDRESS = “0x9bC9d174270872E6401ede67C0A8A6B0A959722c”;

init = async () => {

hideElement(userInfo);

hideElement(createItemForm);

Window.web3 = await Moralis.enableWeb3();

Window.tokenContract = new web3.eth.Contract(contracttokenAbi, TOKEN_CONTRACT_ADDRESS);

initUser();

};
im getting this error main.js:13 Uncaught (in promise) TypeError: Cannot read properties of undefined (reading ‘Contract’)

This is my contract file;
// SPDX-License-Identifier: GPL-3.0

pragma solidity ^0.8.10;

import “@openzeppelin/contracts/token/ERC721/ERC721.sol”;

import “@openzeppelin/contracts/utils/Counters.sol”;

contract nftToken is ERC721 {

using Counters for Counters.Counter;

Counters.Counter private _tokenIds;

constructor () ERC721('nftToken', 'RS'){}

struct Item{

 uint256 id;

 address creator;

 string uri;

}

mapping(uint256 => Item) public Items;

function createItem(string memory uri) public returns(uint256){

 _tokenIds.increment();

 uint256 newItemId = _tokenIds.current();

 _safeMint(msg.sender, newItemId);

 Items[newItemId] = Item(newItemId, msg.sender, uri);

 return newItemId;

}

function tokenURI(uint256 tokenId) public view override returns (string memory) {

    require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

     

      return Items[tokenId].uri;

   

}

}
What i am getting wrong

[ramsir011]

Window.tokenContract = web3.eth.Contract(tokenContractAbi, TOKEN_CONTRACT_ADDRESS);
Uncaught (in promise) TypeError: Cannot read properties of undefined (reading ‘Contract’)
I m getting this error

[TheFabled]

Im having an issue when is comes to updating info on the server. I made an votedCoins object as part of the user object. It is an array of objects that has an ID and Timestamp. I am able to find the right object in the array doing something like this:

const isFound = user.attributes.votedCoins?.find( item => item.id === props.coin.binanceSmartChain )

But now Im not sure how to update just that one objects new timestamp. If i use user.add() or user.addUnique it just pushes another object into the array.

this is how I was trying to add it.

let d = new Date()
            user.fetch().then(user => {
                user.addUnique("votedCoins",
                {
                    id: props.coin.binanceSmartChain,
                    votingTime: d
                });
                user.save();
            });

[jswift24]

Having some trouble with the course at step 402, 403. Would appreciate your help:

1. git clone https://github.com/MoralisWeb3/course-resources.git doesn’t really download the full repo. I get an empty folder instead. git status says everything is deleted:
   D:\Documents\course-resources>git status
   On branch main
   Your branch is up to date with ‘origin/main’.

Changes to be committed:
(use “git restore --staged …” to unstage)
deleted: “201/Icon\r”
deleted: 201/wallet.html
deleted: “202/Icon\r”
deleted: 202/acl-index.html
deleted: “301/Icon\r”
deleted: 301/bootstrap-5.1.3-examples.zip
deleted: “301/bootstrap-5.1.3-examples/Icon\r”
deleted: “301/bootstrap-5.1.3-examples/bootstrap-5.1.3-examples/Icon\r”
deleted: “301/bootstrap-5.1.3-examples/bootstrap-5.1.3-examples/album-rtl/Icon\r”
etc…

2. One of the folders is named “402 & 403” which breaks VSCode/LiveServer on Windows. The folder can’t have a space. Pls change it to something like “402_403”

3. The AppID/ServerURL settings are kind of a mess. Sometimes they are placeholders, sometimes they are left over from the author’s settings. And they are set in multiple places. Should be a single file/location. Would help to have an error message in the UI (or console) if you forgot to set them.

4. Looks like there’s a bug in /402_403/dashboard.html. I get this in the console when I load the page:
   Uncaught (in promise) ReferenceError: listAvailableTokens is not defined
   at main.js:61
   at main.js:67
   (anonymous) @ main.js:61
   (anonymous) @ main.js:67

Thanks,
Alon

[thecil]

@m33lucky

which one was it ? where do I download it from and how to install emulator?

Name: Live Preview
Id: ms-vscode.live-server
Description: Hosts a local server in your workspace for you to preview your webpages on.
Version: 0.2.11
Publisher: Microsoft
VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=ms-vscode.live-server

I guess you ask for that one, the live previewer of the website using a webserver, i use that one while programming using Visual Code. Hope it helps

Carlos Z

[thecil]

Hey @ramsir011, hope you are well.

Please provide the code in the following way so we can help you review it properly

FAQ - How to post code in the forum

Thanks to @thecil for this guide How to post readable code in the forum You can use the “Preformatted Text” button to encapsulate any kind of code you want to show in your post. The demonstration, below, shows you how, and what the formatted code will look like: function formatText() { let words = "I'm a preformatted text button. Please use me wisely!"; } [image] [preformatted text]

Carlos Z

[imanidavis.id]

Hi! What are the plugins used for?

[justkaz]

Hi, there are two courses under the “Moralis” tab: Defi 101 and JavaScript for Beginners.
Is there a full Moralis course that I can’t access?

[thecil]

Hey @imanidavis.id, hope you are good.

You can read all about it here: https://docs.moralis.io/moralis-server/plugins

Carlos Z

[thecil]

Indeed sir, we do have a fresh new JavaScript course which include the moralis sdk on the project you will made on the course

Carlos Z

[justkaz]

Thanks mate. Yes, I see it’s a new course with a new instructor: Zsolt Nagy

[Ayman]

Hi Ivan,

I just want to know if there is a prerequisite to starting this course.
I’ve been watching some of these videos but been getting stuck in a lot of areas that involve Visual Studio. Is there a way to learn something else before jumping into this right away? or should I just keep trying new ways to set up VS.

Thank you