我在盖茨比(Gatsby)应用程序中收到此错误,该错误为Author拉出位置数据。该错误显示author.social的map()点为空
TypeError: Cannot read property 'map' of null
我已经尝试提供默认值,但是它似乎不起作用
这是默认代码:
authors: ({ node: author }) => {
return {
...author,
social: author.social.map(s => ({ url: s })),
};
},
这是我的改变:
authors: ({ node: author }) => {
return {
...author,
social: author.social.map(s => {
if (s === null) {
return ({ url: 'https://www.mywebsite.com' });
} else {
return ({ url: s });
}
})
,
};
},
任何帮助都将非常有帮助,
谢谢
答案 0 :(得分:1)
这就是为什么我会这样做:
authors: ({ node: author }) => {
// This to inspect what there is inside the variable
console.log(author);
// And something like this to avoid the error:
if(author.social && author.social.length > 0){
// code here
}
});