samedi 23 septembre 2017

mapping join results as an array under related rows

In laravel am using eloquent to get data from the database.

I have two tables 'questions' and 'options' Am using the eloquent method to join 'options' to 'questions'

$questions = Question::join('options', 'options.question_id', 'questions.id');

return QuestionResource($questions);

This does return an expected collection of data, where the same question appear multiple times in the collection and each is joined with different options where the 'options.question_id' and 'question.id' are the same.

[
    {
        id: 1,
        text: "Africa is a...?",
        // joined option
        question_id: 1,
        value: "city",
        answer: false
    },
    {
        id: 1,
        text: "Africa is a...?",
        // joined option
        question_id: 1,
        value: "planet",
        answer: false
    },
    {
        id: 1,
        text: "Africa is a...?",
        // joined option
        question_id: 1,
        value: "continent",
        answer: true
    },
    {
        id: 2,
        text: "Albert Heinstein was a...?",
        // joined option
        question_id: 2,
        value: "comedian",
        answer: false
    },
    {
        id: 2,
        text: "Albert Heinstein was a...?",
        // joined option
        question_id: 1,
        value: "genius scientist",
        answer: true
    }
]

I want all options be nested under a key within the related question. Like

[
    {
        id: 1,
        text: "Africa is a...?",
        // joined options
        options: [
            {value: "city", answer: false},
            {value: "planet", answer: false},
            {value: "continent", answer: true}
        ]
    },
    {
        id: 2,
        text: "Albert Heinstein was a...?",
        // joined options
        options: [
            {value: "comedian", answer: false},
            {value: "genius scientist", answer: true}
        ]
    }
]

Can I achieve this with laravel's eloquent or I'll have to apply an extra logic.



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