Should I create separate contract copy for every post or just one contract to deal with all posts?

Question

My Ethereum app consists of creating a post like on Facebook and people can like/comment on it. Should I create separate contract copy for every post or just one contract to deal with all posts?

Answer 1

You should store them all in one contract; there's no reason to create an arbitrary amount of contracts.

In Solidity, you can use a dynamically sized array to store all the posts. A simple example would be a contract like this:

pragma solidity ^0.4.17;

contract Facebook
{
    struct Post
    {
        address sender;
        string text;
    }
    Post[] public posts;
    function createPost(string text) public
    {
        posts.push(Post(msg.sender, text));
    }
}