async-log | Async tracing capabilities for the log crate | Reactive Programming library
kandi X-RAY | async-log Summary
kandi X-RAY | async-log Summary
When building a synchronous application, log messages can be relied on to always happen in sequence. But unfortunately synchronous applications are rarely capable of utilizating system resources to their full potential.
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QUESTION
Okay so I am following a tutorial, and I'm a beginner. This is my first experience with Redux.
This is the error I've been getting when it should be displaying the home screen of my webpage.
Actions must be plain objects. Instead, the actual type was: 'string'. You may need to add middleware to your store setup to handle dispatching other values, such as 'redux-thunk' to handle dispatching functions. See https://redux.js.org/tutorials/fundamentals/part-4-store#middleware and https://redux.js.org/tutorials/fundamentals/part-6-async-logic#using-the-redux-thunk-middleware for examples.
I have been searching everywhere but it looks to me like I applied thunk correctly. I'm hoping someone more experienced will be able to spot my mistake. Thank you.
HomeScreen.js
...ANSWER
Answered 2022-Jan-23 at 18:28PRODUCT_LIST_REQUEST
appears to be a string. You cannot dispatch a string by itself - only action objects. Actions are always objects that have a type
field inside, like {type: 'counter/incremented'}
.
That said, you should be using our official Redux Toolkit package to write your Redux code. Redux Toolkit will simplify all of the Redux store setup and reducer logic you've shown.
QUESTION
my error message:
"Error: Actions must be plain objects. Instead, the actual type was: 'undefined'. You may need to add middleware to your store setup to handle dispatching other values, such as 'redux-thunk' to handle dispatching functions. See https://redux.js.org/tutorials/fundamentals/part-4-store#middleware and https://redux.js.org/tutorials/fundamentals/part-6-async-logic#using-the-redux-thunk-middleware for examples."
I found many answers to this error, but none helped me.
I have store in my react app, with some parts. the last part, make the error.
I'm really confused, following all the answers, how should I create the store.
my index.js file:
...ANSWER
Answered 2021-Nov-11 at 10:08If (students === undefined || students.all.length === 0)
is not true
, that method does not return anything.
But you dispatch(get(students, teacherId))
somewhere, so essentially you dispatch(undefined)
Make it always return something:
QUESTION
TL;DR: Is there some well-known solution out there using React/Redux for being able to offer a snappy and immediately responsive UI, while keeping an API/database up to date with changes that can gracefully handle failed API requests?
I'm looking to implement an application with a "card view" using https://github.com/atlassian/react-beautiful-dnd where a user can drag and drop cards to create groups. As a user creates, modifies, or breaks up groups, I'd like to make sure the API is kept up to date with the user's actions.
HOWEVER, I don't want to have to wait for an API response to set the state before updating the UI.
I've searched far and wide, but keep coming upon things such as https://redux.js.org/tutorials/fundamentals/part-6-async-logic which suggests that the response from the API should update the state.
For example:
...ANSWER
Answered 2021-Jan-19 at 14:27The key phrase here is "optimistic updates", which is a general pattern for updating the "local" state on the client immediately with a given change under the assumption that any API request will succeed. This pattern can be implemented regardless of what actual tool you're using to manage state on the client side.
It's up to you to define and implement what appropriate changes would be if the network request fails.
QUESTION
I'm following the Redux Essentials tutorial and I've run into a problem in part 5, Async Logic and Data Fetching. I'm using TypeScript even though TypeScript is not used in the tutorial because I'm trying to learn both Redux and TypeScript at once.
In the section Checking Thunk Results in Components, I'm getting a type error when calling Redux's unwrapResult
function that I have not been able to figure out.
Here's the error:
...ANSWER
Answered 2020-Aug-30 at 08:26I figured it out. It's necessary to specify the "dispatch" type when calling useDispatch
from react-redux. This is described in Usage With TypeScript: Getting the Dispatch
Type.
In the end, I added these extra types to the file where my Redux store is being created:
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