Question

我想将一个文档从一个集合嵌入到另一个集合中，这里是一个 UoM 到 Products 。

Template.NewProduct.helpers({
  ...
  uoms: function() {
    return UoM.find();
  },
  ...
});

Template.NewProduct.events({
  //Submit and Add to Database
  'submit form': function(event, template) {
    event.preventDefault();
    selectedUoM = UoM.findOne({
      _id: event.target.uomid.value
    });
    var doc = {
      name: event.target.name.value,
      category: event.target.category.value,
      suppliers: selectedSup,
      uomid: event.target.uomid.value,
    };
    Products.insert(doc, function(error, result) {
      ...
    });
  },
});

========= Collections ===========
import SimpleSchema  from 'simpl-schema';

Products = new Mongo.Collection("products");
Products.attachSchema(new SimpleSchema({
  name: {
    type: String,
    label: "Product Name",
    max: 200
  },
  suppliers: {
    type: Array,
    label: "Suppliers",
  },
  'suppliers.$' : {type: String},

  category: {
    type: String,
    label: "Category"
  },
  // Unit: unit , 50kg bag, 25kg bag, 22.5kg barrel etc...
  uomid: { //This one is working with UoM._id
    type: String,
    label: "Unit of Measurement",
  },
  uom_data: { //Need to populate this one with _id, name, unit, unitname from UoM collection
    type: Array,
    optional: true
  },

<template name="NewProduct">
  ...
    <label for="uomid">Unit of Measurement</label>
    <select class="sel2js" name="uomid">
      {{#each uoms}}
        {{> uomprod}}
      {{/each}}
    </select>
    <button type="submit" class="btn" id="submitNewProduct" value="Submit">Submit</button>
    
  
<template name="uomprod">
  <option value="{{_id}}">{{name}} - {{unit}} {{unitname}}</option>
</template>


<script type="text/javascript">
  $(document).ready(function() {
        $(".sel2js").select2();
      };
</script>

Answer 1

非常简单，因为您已经找到了UoM文档，您的selectedUoM变量将包含一个简单的js对象，该对象可以直接分配给其他集合中的密钥。

selectedUoM = UoM.findOne(event.target.uomid.value);
var doc = {
  name: event.target.name.value,
  category: event.target.category.value,
  suppliers: selectedSup,
  uomid: event.target.uomid.value,
  uomdata: selectedUoM
};
Products.insert(doc,...

请注意，自uomid === selectedUoM._id起，您的模型中的冗余很少。您可以轻松地完全删除uomid密钥。

您还需要更改产品架构，以支持uomdata的对象，而不是数组！ - 您只是插入单个文档，而不是数组。为避免必须指定子结构，您还必须使用blackbox: true。

  uom_data: { //Need to populate this one with _id, name, unit, unitname from UoM collection
    type: Object,
    optional: true,
    blackbox: true
  },

Mongo / Meteor：从其他MongoDB Collection中插入数据

1 个答案: