First just have a look at my easy code so that I can explain by giving references.
// SPDX-License-Identifier: MIT
pragma solidity >=0.4.22 <0.9.0;
contract GeoSpatialData{
struct GeoData{
uint id;
address owner_address;
string data_name;
string data_year;
string data_description;
string data_img_url;
string data_url;
string data_category;
string data_published_date;
}
GeoData[] public geoData;
// write function
function createData(string memory _data_name,address _owner_address,string _data_year,string _data_description,string _data_image_url,string _data_url,string _data_published_date ) public{
}
// read all data function
function readData() public{
}
// read single data function
function readSingle() public{
}
}
Now I have a struct of GeoData as you can see. What I want is to create an object of this so definitely I am going to need the parameters while passing them in the create data. I am getting the error that Data location must be "memory" or "calldata" for parameter in function, but none was given.
I learned the way to create objects from this course. Here is the link of the github whose code inspired me to write code like this.
I also have one more question: Is storing all the data in an array a good idea? Can't I store as class objects? Does solidity support these programming concepts?
