我要求api提取数据,我用邮递员对其进行测试,而laravel将其正确地作为数组发送,但是我想将我的数组变成[ ob :观察者],我无法感谢@Stockafisso,从中提取数组已解决,但
编辑:现在我的问题是,programming_languages数组只能在getLanguages()方法内部访问,而在其他任何地方
data(){
return{
answer: '',
maxWrong: '',
programming_languages : []
}
},
methods:{
getLanguages(){
axios.get('/api/toController').then((response)=> {
this.programming_languages = JSON.parse(JSON.stringify(response.data)); //works fine
this.answer = this.programming_languages[Math.floor(Math.random() * this.programming_languages.length)].name; //works fine
this.maxWrong = this.answer.length;// works fine here, i dont want to initiaize answer variable in this method
});
},
randWord(){
this.answer = this.programming_languages[Math.floor(Math.random() * this.programming_languages.length)].name;// it is not working here
//Error in created hook: "TypeError: Cannot read property 'name' of undefined"
this.maxWrong = this.answer.length;// doesn't work here
}
},
created(){
this.getLanguages();
this.randWord();
}
我该怎么办? 谢谢
答案 0 :(得分:0)
最可能的错误是在这里:
this.programming_languages.push(JSON.parse(JSON.stringify(response.data)));
您要在声明的programming_languages
内插入Laravel返回的数组,同时应重写或合并它。
为了更好地解释,请举一个小例子:
考虑这一点:
let arr1 = [];
let arr2 = [1,2,3];
如果您进行arr1.push(arr2)
,则您的arr1将是[[1,2,3]]
,而您希望将其设为[1,2,3]
。
回到您的问题,要解决此问题,您有两种方法:
a)
.then((response)=> {
this.programming_languages = JSON.parse(JSON.stringify(response.data));
b)
.then((response)=> {
let swapArray = [...this.programming_languages];
this.programming_languages = swapArray.concat(JSON.parse(JSON.stringify(response.data)));
如果这不能解决错误, 可能是问题出在Laravel返回的数组中。如果没有数字键或未排序的键,则JS将用Ob“填充”缺少的空格。观察者试图保留钥匙。
答案 1 :(得分:0)
谢谢大家,终于我设法解决了
首先,我从vue的[ob:Observer]中提取数组
this.programming_languages = JSON.parse(JSON.stringify(response.data));
特别感谢@stockafisso
其二是我无法从axios方法中获得此programming_languages数组,这是由于异步调用的性质而发生的,请参阅此信息链接
How do I return the response from an asynchronous call?
我设法通过异步和等待的方式解决了它
methods: {
async getPosts(){
await axios.get('/api/hangman').then(response => {
this.programming_languages = JSON.parse(JSON.stringify(response.data));
}).catch(error => console.log(error));
},
randWord(){
this.answer = this.programming_languages[Math.floor(Math.random() * this.programming_languages.length)].name;
this.maxWrong = this.answer.length;
},
},
created(){
this.getPosts().then(() => this.randWord());
}