Creating an interactive questionnaire

Looking for insights on the following situation:

I'm working with a survey structure that consists of questions and answers:

questions: Question[];
answer: Answer[];

Where Question is defined as:

export class Question {
    idQuestion: string;
    question: string;
}

export class Answer {
    idAnswer: string;
    answer: string;
    idQuestion: string;
    type: string; // inputbox - select - etc
}

Currently, I am able to display questions and answers separately like this:

<ul *ngFor="let question of questions;">
    <li>
        <a id="{{question.idQuestion}}">{{question.question}}</a>
    </li>
</ul>
<ul *ngFor="let answer of answers;">
    <li>
        <a id="{{answer.idAnswer}}">{{answer.answer}}</a>
    </li>
</ul>

However, I would like to render them in the format of:

question1: answer;
question2: answer;
question3: select;

How can I address this issue? Is there a specific pattern in Angular2 that can help with this? I want to avoid hardcoding the html by looping through the questions in the ts file to find the appropriate answers.

Answer №1

Here are two options that come to mind:

Map

You could map the question and answer together in TypeScript and then display them using a single loop:

let questionsAndAnswers =
    questions.map(question => {question:question, answer: answers.find((answer) => answer.idQuestion === question.idQuestion)})

This will give you an array of tuples containing the answer and question. In HTML, you can then do something like this:

<ul *ngFor="let questionTuble of questionsAndAnswers ;">
    <li>
        <a id="{{question.idQuestion}}">{{questionTuble.question.question}}:{{questionTuble.answer.answer}}</a>
    </li>
</ul>

Change model

Another solution that I would consider is:

Modify your question model to include the answer and remove the questionId from the answer. This, in my opinion, would enhance readability in the HTML:

<ul *ngFor="let question of questions;">
    <li>
        <a id="{{question.idQuestion}}">{{question.question}}:{{question.answer.answer}}</a>
    </li>
</ul>

Additionally, I would suggest renaming the 'question' property of question to 'text' or something similar to further improve readability.

(Please note, these suggestions have not been tested, so there may be some syntax errors)

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