我只想有一个versioneditems
MongoDB 中的集合,但我需要注册VersionedItem
模型和ItemPatch
模型,因为我需要创建ItemPatch
es 填充 aVersionedItem
.
不会有单独的ItemPatch
文档(它们嵌入在VersionedItem
)。除了在 MongoDB 中创建了一个额外的集合之外,下面的代码是有效的:
src/models/versionedItemFactory.js
const VersionedItemSchema = require('../schemas/VersionedItem');
module.exports = (db) => {
var VersionedItemModel = db.model('VersionedItem', VersionedItemSchema);
return VersionedItemModel;
};
src/models/itemPatchFactory.js
const ItemPatchSchema = require('../schemas/ItemPatch');
module.exports = (db) => {
var ItemPatchModel = db.model('ItemPatch', ItemPatchSchema);
return ItemPatchModel;
};
src/schemas/util/asPatch.js
var mongoose = require('mongoose');
module.exports = function _asPatch(schema) {
return new mongoose.Schema({
createdAt: { type: Date, default: Date.now },
jsonPatch: {
op: { type: String, default: 'add' },
path: { type: String, default: '' },
value: { type: schema }
}
});
};
src/schemas/Item.js
var mongoose = require('mongoose');
module.exports = new mongoose.Schema({
title: { type: String, index: true },
content: { type: String },
type: { type: String, default: 'txt' }
}, { _id: false });
src/schemas/ItemPatch.js
var asPatch = require('./util/asPatch');
var ItemSchema = require('./Item');
module.exports = asPatch(ItemSchema);
src/schemas/VersionedItem.js
var mongoose = require('mongoose');
var ItemPatchSchema = require('./ItemPatch');
module.exports = new mongoose.Schema({
createdAt: { type: Date, default: Date.now },
patches: [
{
createdAt: { type: Date, default: Date.now },
jsonPatch: { type: ItemPatchSchema }
}
]
});
然后像这样注册:
db.once('open', function() {
require('./models/itemPatchFactory')(db);
require('./models/versionedItemFactory')(db);
});
我需要注册ItemPatch
模型通过itemPatchFactory
因为我希望能够像这样填充版本化项目:
var itemPatch = new db.models.ItemPatch({
jsonPatch: {
op: 'add',
path: '',
value: {
title: 'This is a title',
content: 'This is content',
type: 'txt'
}
}
});
var itemPatch2 = new db.models.ItemPatch({
jsonPatch: {
value: {
title: 'This is a title 2',
content: 'This is content 2'
}
}
});
var versionedSomething = new db.models.VersionedItem();
versionedSomething.patches.push(itemPatch);
versionedSomething.patches.push(itemPatch2);
versionedSomething.save(function (err, result) {
if (err) throw err;
console.log('result:', result);
});
这成功创建了包含 2 个补丁的版本化项目,但是(空)itempatches
集合是在 MongoDB 中创建的,我想避免这种情况。