我想參考定義為模式的子檔案。這是示例：
考試模型.js：
const answerSchema = new mongoose.Schema({
text: String,
isCorrect: Boolean,
});
const questionSchema = new mongoose.Schema({
text: String,
answers: [answerSchema],
});
const examSchema = new mongoose.Schema({
title: String,
questions: [questionSchema],
})
const ExamModel = mongoose.model("Exam", examSchema);
//...export the schemas and ExamModel...
已解決的Exam.model.js：
const solvedExamSchema = new mongoose.Schema({
exam: {
type: mongoose.Schema.Types.ObjectId,
ref: "Exam",
}
answers: [{
question: {
type: mongoose.Schema.Types.ObjectId,
ref: //What do I put here? "question" is not a model, it's only a sub-document schema
}
answer: {
type: mongoose.Schema.Types.ObjectId,
ref: //Same problem
}
}],
});
所以很明顯，我想參考問題和答案，它們只是作為模式的子檔案而不是模型。我怎樣才能參考它們？謝謝。
uj5u.com熱心網友回復：
您應該宣告相應的Answer和Question Schema參考那些：
const answerSchema = new mongoose.Schema({
text: String,
isCorrect: Boolean,
});
const questionSchema = new mongoose.Schema({
text: String,
answers: [answerSchema],
});
const examSchema = new mongoose.Schema({
title: String,
questions: [questionSchema],
})
const AnswerModel = mongoose.model("Answer", examSchema);
const QuestionModel = mongoose.model("Question", examSchema);
const ExamModel = mongoose.model("Exam", examSchema);
...
const solvedExamSchema = new mongoose.Schema({
exam: {
type: mongoose.Schema.Types.ObjectId,
ref: "Exam",
}
answers: [{
question: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Question'
}
answer: {
type: mongoose.Schema.Types.ObjectId,
ref: 'Answer'
}
}],
});
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