06 - Get one item

In this module, we'll write a GET request that grabs a single item from the database for a specific user.

CODE

Add the following method to the 03-auth-test.js file:

/***************************************
 * GET ITEM BY USER
*************************************/
function getOneByUser() {
    let postIdNumber = document.getElementById("getNumber").value; //1

    const fetch_url = `http://localhost:3000/authtest/${postIdNumber}` //2
    const accessToken = localStorage.getItem('SessionToken')

    const response = fetch(fetch_url, {
        method: 'GET',
        headers: {
            'Content-Type': 'application/json',
            'Authorization': accessToken
        }
    })
        .then(response => {
            return response.json();
        })
        .then(function (response) {
            console.log(response); 
            var myItem = document.getElementById('getItemValue'); //3
            myItem.innerHTML = response.authtestdata; //4
        })
}

Analysis

1. We get the postIdNumber provided in the getNumber field. Because we are making an authenticated request, this id has to exist in the database, as well as match the user.id from the database for the user that you are using currently logged in as.

2. We pass the postIdNumber into the url with a template literal.

3. We target an element called getItemValue. It's a label tag.

4. We set the value of the label to the value of response.authtestdata. This means that the data will be populated in the label when the DOM loads.

Test

1. Go ahead and run the app.

2. Click the Get Single Item button after putting in the id from the previous module.

3. You should see the following:

   
4. Notice that we have pulled the single item from the server. In this case, the item has the id of 10.

5. Not only did we print to the console, we added the data pulled from the server to the DOM in the <label> element on step 11 (GET Single Item).