Skip to content

Instantly share code, notes, and snippets.

@wissalHaji
Created November 15, 2020 19:05
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save wissalHaji/94c8a5f356cb6f8da02702cc58584bd9 to your computer and use it in GitHub Desktop.
Save wissalHaji/94c8a5f356cb6f8da02702cc58584bd9 to your computer and use it in GitHub Desktop.
simple crud with solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
contract Crud {
struct User {
uint256 id;
string name;
}
User[] public users;
uint256 public nextId = 1;
function add(string memory name) public {
User memory user = User({id : nextId, name : name});
users.push(user);
nextId++;
}
function read(uint256 id) public view returns(string memory){
uint256 i = find(id);
return users[i].name;
}
function update(uint256 id, string memory newName) public {
uint256 i = find(id);
users[i].name = newName;
}
function destroy(uint256 id) public {
uint256 i = find(id);
delete users[i];
}
function find(uint256 id) private view returns(uint256){
for(uint256 i = 0; i< users.length; i++) {
if(users[i].id == id)
return i;
}
revert("User not found");
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment