Question

在postjs post route中我将mongoose模型对象保存到一个数组中，现在我想将该数组保存到mongodb，为了做到这一点，我需要调用array.save（）方法，这是方法中构建的mongoose。为此，我需要将此数组转换为本例中 Form 的Mongoose模型类型。请告诉我们如何应用此转换，还是需要其他解决方案？ Mongoose架构是：

var mongoose = require('mongoose');
var Schema = mongoose.Schema;    

var formSchema = new Schema({    
    controlType: {type: String, required: true},   
    label: {type: String, required: true},
    required: {type: Boolean}, 
    placeholder: {type: String},   
    options: [String],    //to store options for select or radio input
} ,  {collection: 'inputForm'});

module.exports = mongoose.model('Form', formSchema);

NodeJS发布路线：

router.post('/userform', function (req, res, next) {

    var form = [];    
    for (var key in req.body) {
        if (req.body.hasOwnProperty(key)) {
            var formObj = new Form({
                controlType: req.body[key].controlType,
                label: req.body[key].label,
                required: req.body[key].required,
                placeholder: req.body[key].placeholder,
                options: req.body[key].options
            });                        
        }
        form.push(formObj);        
    }
    console.log('type of form 0528');
    console.log(typeof(form));

    form.save(function(err, result) { // here is the issue, this line is not working because form is not type of mongoose model
        if (err) {
            return res.status(500).json({
                title: 'An error occurred in form api 0528',
                error: err
            });
        }
        res.status(201).json({
            message: 'Form created',
            obj: result
        });
    });    
});

module.exports = router;

Answer 1

Model.create 可以使用一组对象来创建多个文档。

因此，您可以构建一个对象数组而不是模型实例，然后将该数组传递给 Form.create ：

var formArr = []

for (var key in req.body) {

  if (req.body.hasOwnProperty(key)) {

    var formObj = {
      controlType: req.body[key].controlType,
      label: req.body[key].label,
      required: req.body[key].required,
      placeholder: req.body[key].placeholder,
      options: req.body[key].options
    }

    formArr.push(formObj)

  }

}

Form.create(formArr, function(err, results) {

  ...

})

<小时/>

如果要在单个文档中保存对象数组，请尝试使用嵌套模式：

var controlSchema = new Schema({    
  controlType: {type: String, required: true},   
  label: {type: String, required: true},
  required: {type: Boolean}, 
  placeholder: {type: String},   
  options: [String]
}, {collection: 'inputForm'})

var formSchema = new Schema({    
  controls: [controlSchema]
})

module.exports = mongoose.model('Form', formSchema)

...然后将数组保存为新文档中的控件字段，如下所示：

var controlsArr = []

for (var key in req.body) {

  if (req.body.hasOwnProperty(key)) {

    var controlObj = {
      controlType: req.body[key].controlType,
      label: req.body[key].label,
      required: req.body[key].required,
      placeholder: req.body[key].placeholder,
      options: req.body[key].options
    }

    controlsArr.push(controlObj)

  }

}

var form = new Form({
  controls: controlsArr
})

form.save(function(err, result) {

  ...

})

将数组的类型转换为Mongoose Model

1 个答案: