[英]How do I dynamically add objects to an object's property?
我正在构建调查表,问题可以有多个答案,我需要构建一系列问题和答案,例如:
{
question: 'question',
answer: {id: 1, answers: 'answer 1'},
{id: 2, answer: 'answer 2'}
}
我需要显示用户选择的问题和答案的摘要。
例如:问题:您住过以下哪个州? 答案:阿拉巴马州,阿拉斯加,新泽西州,罗德岛州。
结果对象可能是:
{
question: 'Which of these states have you lived in?',
answer: {id: 1, answer: 'Alaska'},
{id: 3, answer: 'Rhode Island'}
}
如何仅在问题只出现一次的情况下动态添加答案?
我试过了:
var questionAnswerObject = [];
angular.forEach(answersObject, function(value, key){
questionAnswerObject.push({
question: question.question,
answer: value.answer
});
});
但是,它当然两次显示了这个问题。
您缺少的一些重要信息:您需要answers
成为包含所有答案的数组(或对象)。 您不能以尝试的方式将多个对象分配给一个值-它们需要以某种方式包装。
因此,例如,您的答案对象可能看起来像这样:
var answerObject = {
question: 'My Question',
answers: [
{id: 1, answer: 'first answer'},
{id: 2, answer: 'second answer'}
]
}
或者,您可以像这样通过问题ID的映射来作为answers
:
var answerObject = {
question: 'My Question',
answers: {
1: 'first answer',
2: 'second answer'
}
}
要在第一个示例中添加答案,只需执行以下操作:
answerObject.answers.push( {id: 3, answer: 'new answer'} );
要在第二个示例中添加答案,只需执行以下操作:
answerObject.answers[3] = 'new answer';
我对您的想法是您的最终目标,就像这个问题和一系列答案
var arrayObjQuestions = [{
question: 'question',
answer: [{id: 1, answers: 'answer 1'},
{id: 2, answer: 'answer 2'}]
},...];
因此,如果循环抛出问题,并添加答案,如下所示
arrayObjQuestions[0].answer.push({id:1, answer: "answer 1"});
arrayObjQuestions[0].answer.push({id:2, answer: "answer 2"});
arrayObjQuestions[0].answer.push({id:3, answer: "answer 3"});
实现此目的的最佳方法是:
var questionAnswerObject = {};
var answers = [];
answers.push({id:1, answer: 'Alaska'});
answers.push({id:3, answer: 'Rhode Island'});
questionAnswerObject["question"] = 'Which of these states have you lived in?';
questionAnswerObject["answer"] = answers ;
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