wasp/web/docs/tutorials/todo-app/updating-tasks.md

title
Updating tasks

import useBaseUrl from '@docusaurus/useBaseUrl';

Todo app isn't done if you can't mark a task as done!

For that, we will need to do two things:

1. Implement Wasp action that updates the task.
2. Modify our React code so it calls that action.

Action

Wasp declaration

We declare Wasp action:

// ...

action updateTask {
  fn: import { updateTask } from "@ext/actions.js",
  entities: [Task]
}

JS implementation

We define JS implementation of Wasp action in ext/actions.js:

// ...

export const updateTask = async (args, context) => {
  return context.entities.Task.update({
    where: { id: args.taskId },
    data: {
      isDone: args.data.isDone
    }
  })
}

React logic

And we update the React component:

// ...
import updateTask from '@wasp/actions/updateTask'

// ...

const Task = (props) => {
  const handleIsDoneChange = async (event) => {
    try {
      await updateTask({
        taskId: props.task.id,
        data: { isDone: event.target.checked }
      })
    } catch (error) {
      window.alert('Error while updating task: ' + error.message)
    }
  }

  return (
    <div>
      <input
        type='checkbox' id={props.task.id}
        checked={props.task.isDone}
        onChange={handleIsDoneChange}
      />
      {props.task.description}
    </div>
  )
}
// ...

Awesome! We can now tick this task as done ;).