DELETE (DELETE/DELETE)

Somewhere on a page you must submit the id to forward to the API. One way is to add a path to a button

<button onclick="api3del('tsk/del')">Call Javascript</button>

The AJAX Request accepts dynamic call (+path) and writes back to the HTML page target (id="data")

function api3get(path) {
var url = "https://api3.go4webdev.org/"+path;
var xhr = new XMLHttpRequest();
xhr.open("GET", url);
xhr.setRequestHeader("Accept", "application/json");
xhr.onload = function() {
if (xhr.readyState === 4) {
document.getElementById("data").innerHTML = this.responseText
}
};
xhr.send();
}

Instead of storing each Query in the API, the query is stored in a database (almost similar to the Postgresql view function) fetched for each request. This means easier to maintain and more generic API (fewer endpoints)

The query is fetced with an id "tsk_all" from the REST call https://api3.go4webdev.org/tsk/all

func Getquery(path string) string {
// get query from lookup db
var query string
err := db.QueryRow("SELECT sql_query FROM sqls WHERE sql_id=$1", path).Scan(&query)
if err != nil {
path = ""
}
fmt.Println(query)
return query
}

The lookup Query look like this with a parameter $1.

DELETE FROM tsk WHERE tsk_id = $1

The DELETE endpoint in the Go API does not return any data.

package main

import (
"net/http"
)

func Delete(w http.ResponseWriter, r *http.Request) {
scope, action, val := getpath(r)
switch action {
case "del":
query := Getquery(scope + "_" + action)
delete(query, val)
}
}

// delete record
func delete(query string, val string) {
db.MustExec(query, val)
}