TypeError：无法读取未定义 React 的属性“forEach”

Question

I am trying to fetch data from MDB database to display movies. Initially I have implemented a click event to call data and no errors were found. Until this happened!

And this is code:

this.performSearch()
    }
    performSearch() {
        console.log("Perform search using moviedb")
        const urlString = "https://api.themoviedb.org/3/search/movie?query=avengers&api_key=1b5adf76a72a13bad99b8fc0c68cb085"
        $.ajax({urlString,
            success: (searchResults) => {
            console.log("Fetched data successfully")
                // console.log(searchResults)
                const results = searchResults.results

                var movieRows = []

                results.forEach((movie) => {
                  console.log(movie.title)

                });
                  const movie = <MovieRow movie={movie}/>
                  movieRows.push(movie)

                this.setState({rows: movieRows})   

Answer 1

You have no results. To protect against this you can change

const results = searchResults.results

to

const results = searchResults.results ? searchResults.results : []