axios-react | HTTP client component for React based on Axios | HTTP Client library

I wonder if someone could help me. I have read many StackOverflow's answers around this and other great articles like this one and I couldn't implement an answer yet.

I have got a simple blog app in React. I have a form to submit the data and I have separate post and posts component as well. I can actually send data to my firebase database. I also get the response in GET method but I cannot show the response as I need it to be. I need an array of posts which each post has a title and content so that I can send its data to my Post component. But I always get an error like( map cannot be used on the response) and I actually cannot get an array out of my database. I even wonder if I am sending data in the right format. Please check my code below and help me out. Thanks.

Testing out and building a WordPress theme in React I've typically seen the URL hard coded in a componentDidMount like:

New to React - I want to make a GET request to my Rails backend via Axios, to bring in what will be static data (just a table with a search function by users) of a list of organizations.

Currently, I got it working the way I would like while passing in an array of organizations I made by hand, as props to my WholeApp class. Now, I want to call on the API endpoint to achieve the same effect, but with the real data.

However, when I set state to the list of organizations via the Axios call, I think it tries to render the component before the call is complete, and I get an undefined error in my OrgTable class (which builds the table).

I think I am missing something obvious, but haven't been able to find it. I am pretty sure it is not a syntax error like this or that I am not binding correctly without ES6 sytnax.

Here is where I make the Axios call: