What is the error when switching the year?

Question

React

Going through this great tutorial https://www.gitbook.com/book/maxfarseer/redux-cour... I
encountered the following annoying error when switching the year
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and when passing the setYear function through a prop to the page component I catch the following
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actually the code itself
https://codesandbox.io/s/7znywy46lj
ask for help

Answer 1

https://codesandbox.io/s/mopx1nzpkj
you have a bunch of little errors
1 you didn't enable connect and therefore the component doesn't know about the setYear function
2 you display the year as {year} but as soon as you click on 1 of the year buttons you go to the reducer put not a number, but an object
return { ...state, year: action.payload }, it will return you {year:2017} and in the component you need to access it like this {year.year}
at this moment const { year, photos} = this.props you will receive your data in the component. Print them to the console and then it will become a little clearer what your errors are