knex.js Error message insert into postgreSQL

Question

Knex.js Error message when trying to insert into postgreSQL

const express = require("express");
const app = express();
const cors = require("cors");
const knex = require("./db/db");

 //middlewares
 app.use(cors());
 app.use(express.json());
 //routes
 //creating a task

 app.post("/task", async (req, res) => {
 const { name } = req.body;
 const newtask = await knex
  .raw("insert into todo (name) values ($1)", [name])
  .then(() => {
   knex
    .select()
    .from("todo")
    .then(() => {
      res.send(newtask.row);
     });
   });
 });

throw new Error( Expected ${expectedBindings} bindings, saw ${index} ); ^

Error: Expected 1 bindings, saw 0

Answer 1

You almost got it right. Replace your $1 with just a question mark (?) and knex will allow it.

Also - the way you are combining await and.then doesnt make sense to me. To clarify what I would do:

const newTask = await knex.raw(‘INSERT INTO todo (name) VALUES (?);’, [name]);
const allTasks = await knex.from(‘todo’).select();
res.send(allTasks);

Another simplified way to do this with nicer knex syntax:

const newTask = await knex(‘todo’).insert({ name });
const allTasks = await knex(‘todo’).select();
res.send(allTasks);

Note that the response object doesnt contain rows unless it is a raw query. Lastly, maybe check that name actually exists after trying to destructure it - people will try sending the weirdest things online:)

Good luck!